// check profile line; if line == 0, this was generated from a command line option
// return 1 if the command is to be added to the linked list of profile commands
// return 0 if the command was already executed inside the function
int profile_check_line(char *ptr, int lineno, const char *fname) {
EUID_ASSERT();
// check ignore list
int i;
for (i = 0; i < MAX_PROFILE_IGNORE; i++) {
if (cfg.profile_ignore[i] == NULL)
break;
if (strncmp(ptr, cfg.profile_ignore[i], strlen(cfg.profile_ignore[i])) == 0)
return 0; // ignore line
}
if (strncmp(ptr, "ignore ", 7) == 0) {
char *str = strdup(ptr + 7);
if (*str == '\0') {
fprintf(stderr, "Error: invalid ignore option\n");
exit(1);
}
// find an empty entry in profile_ignore array
int j;
for (j = 0; j < MAX_PROFILE_IGNORE; j++) {
if (cfg.profile_ignore[j] == NULL)
break;
}
if (j >= MAX_PROFILE_IGNORE) {
fprintf(stderr, "Error: maximum %d --ignore options are permitted\n", MAX_PROFILE_IGNORE);
exit(1);
}
// ... and configure it
else
cfg.profile_ignore[j] = str;
return 0;
}
// mkdir
if (strncmp(ptr, "mkdir ", 6) == 0) {
fs_mkdir(ptr + 6);
return 1; // process mkdir again while applying blacklists
}
// mkfile
if (strncmp(ptr, "mkfile ", 7) == 0) {
fs_mkfile(ptr + 7);
return 1; // process mkfile again while applying blacklists
}
// sandbox name
else if (strncmp(ptr, "name ", 5) == 0) {
cfg.name = ptr + 5;
if (strlen(cfg.name) == 0) {
fprintf(stderr, "Error: invalid sandbox name\n");
exit(1);
}
return 0;
}
else if (strcmp(ptr, "ipc-namespace") == 0) {
arg_ipc = 1;
return 0;
}
// seccomp, caps, private, user namespace
else if (strcmp(ptr, "noroot") == 0) {
#if HAVE_USERNS
if (checkcfg(CFG_USERNS))
check_user_namespace();
else
warning_feature_disabled("noroot");
#endif
return 0;
}
else if (strcmp(ptr, "nonewprivs") == 0) {
arg_nonewprivs = 1;
return 0;
}
else if (strcmp(ptr, "seccomp") == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP))
arg_seccomp = 1;
else
warning_feature_disabled("seccomp");
#endif
return 0;
}
else if (strcmp(ptr, "caps") == 0) {
arg_caps_default_filter = 1;
return 0;
}
else if (strcmp(ptr, "caps.drop all") == 0) {
arg_caps_drop_all = 1;
return 0;
}
else if (strcmp(ptr, "shell none") == 0) {
arg_shell_none = 1;
return 0;
}
else if (strcmp(ptr, "tracelog") == 0) {
arg_tracelog = 1;
return 0;
}
else if (strcmp(ptr, "private") == 0) {
arg_private = 1;
return 0;
}
if (strncmp(ptr, "private-home ", 13) == 0) {
#ifdef HAVE_PRIVATE_HOME
if (checkcfg(CFG_PRIVATE_HOME)) {
if (cfg.home_private_keep) {
if ( asprintf(&cfg.home_private_keep, "%s,%s", cfg.home_private_keep, ptr + 13) < 0 )
errExit("asprintf");
} else
cfg.home_private_keep = ptr + 13;
arg_private = 1;
}
else
warning_feature_disabled("private-home");
#endif
return 0;
}
else if (strcmp(ptr, "allusers") == 0) {
arg_allusers = 1;
return 0;
}
else if (strcmp(ptr, "private-dev") == 0) {
arg_private_dev = 1;
return 0;
}
else if (strcmp(ptr, "private-tmp") == 0) {
arg_private_tmp = 1;
return 0;
}
else if (strcmp(ptr, "nogroups") == 0) {
arg_nogroups = 1;
return 0;
}
else if (strcmp(ptr, "nosound") == 0) {
arg_nosound = 1;
return 0;
}
else if (strcmp(ptr, "novideo") == 0) {
arg_novideo = 1;
return 0;
}
else if (strcmp(ptr, "no3d") == 0) {
arg_no3d = 1;
return 0;
}
else if (strcmp(ptr, "allow-private-blacklist") == 0) {
arg_allow_private_blacklist = 1;
return 0;
}
else if (strcmp(ptr, "netfilter") == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK))
arg_netfilter = 1;
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "netfilter ", 10) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
arg_netfilter = 1;
arg_netfilter_file = strdup(ptr + 10);
if (!arg_netfilter_file)
errExit("strdup");
check_netfilter_file(arg_netfilter_file);
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "netfilter6 ", 11) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
arg_netfilter6 = 1;
arg_netfilter6_file = strdup(ptr + 11);
if (!arg_netfilter6_file)
errExit("strdup");
check_netfilter_file(arg_netfilter6_file);
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strcmp(ptr, "net none") == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
arg_nonetwork = 1;
cfg.bridge0.configured = 0;
cfg.bridge1.configured = 0;
cfg.bridge2.configured = 0;
cfg.bridge3.configured = 0;
cfg.interface0.configured = 0;
cfg.interface1.configured = 0;
cfg.interface2.configured = 0;
cfg.interface3.configured = 0;
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "net ", 4) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
#ifdef HAVE_NETWORK_RESTRICTED
// compile time restricted networking
if (getuid() != 0) {
fprintf(stderr, "Error: only \"net none\" is allowed to non-root users\n");
exit(1);
}
#endif
// run time restricted networking
if (checkcfg(CFG_RESTRICTED_NETWORK) && getuid() != 0) {
fprintf(stderr, "Error: only \"net none\" is allowed to non-root users\n");
exit(1);
}
if (strcmp(ptr + 4, "lo") == 0) {
fprintf(stderr, "Error: cannot attach to lo device\n");
exit(1);
}
Bridge *br;
if (cfg.bridge0.configured == 0)
br = &cfg.bridge0;
else if (cfg.bridge1.configured == 0)
br = &cfg.bridge1;
else if (cfg.bridge2.configured == 0)
br = &cfg.bridge2;
else if (cfg.bridge3.configured == 0)
br = &cfg.bridge3;
else {
fprintf(stderr, "Error: maximum 4 network devices are allowed\n");
exit(1);
}
net_configure_bridge(br, ptr + 4);
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "veth-name ", 10) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
br->veth_name = strdup(ptr + 10);
if (br->veth_name == NULL)
errExit("strdup");
if (*br->veth_name == '\0') {
fprintf(stderr, "Error: no veth-name configured\n");
exit(1);
}
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "iprange ", 8) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (br->iprange_start || br->iprange_end) {
fprintf(stderr, "Error: cannot configure the IP range twice for the same interface\n");
exit(1);
}
// parse option arguments
char *firstip = ptr + 8;
char *secondip = firstip;
while (*secondip != '\0') {
if (*secondip == ',')
break;
secondip++;
}
if (*secondip == '\0') {
fprintf(stderr, "Error: invalid IP range\n");
exit(1);
}
*secondip = '\0';
secondip++;
// check addresses
if (atoip(firstip, &br->iprange_start) || atoip(secondip, &br->iprange_end) ||
br->iprange_start >= br->iprange_end) {
fprintf(stderr, "Error: invalid IP range\n");
exit(1);
}
if (in_netrange(br->iprange_start, br->ip, br->mask) || in_netrange(br->iprange_end, br->ip, br->mask)) {
fprintf(stderr, "Error: IP range addresses not in network range\n");
exit(1);
}
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "mac ", 4) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (mac_not_zero(br->macsandbox)) {
fprintf(stderr, "Error: cannot configure the MAC address twice for the same interface\n");
exit(1);
}
// read the address
if (atomac(ptr + 4, br->macsandbox)) {
fprintf(stderr, "Error: invalid MAC address\n");
exit(1);
}
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "mtu ", 4) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (sscanf(ptr + 4, "%d", &br->mtu) != 1 || br->mtu < 576 || br->mtu > 9198) {
fprintf(stderr, "Error: invalid mtu value\n");
exit(1);
}
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "ip ", 3) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (br->arg_ip_none || br->ipsandbox) {
fprintf(stderr, "Error: cannot configure the IP address twice for the same interface\n");
exit(1);
}
// configure this IP address for the last bridge defined
if (strcmp(ptr + 3, "none") == 0)
br->arg_ip_none = 1;
else {
if (atoip(ptr + 3, &br->ipsandbox)) {
fprintf(stderr, "Error: invalid IP address\n");
exit(1);
}
}
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "ip6 ", 4) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (br->arg_ip_none || br->ip6sandbox) {
fprintf(stderr, "Error: cannot configure the IP address twice for the same interface\n");
exit(1);
}
// configure this IP address for the last bridge defined
// todo: verify ipv6 syntax
br->ip6sandbox = ptr + 4;
// if (atoip(argv[i] + 5, &br->ipsandbox)) {
// fprintf(stderr, "Error: invalid IP address\n");
// exit(1);
// }
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
else if (strncmp(ptr, "defaultgw ", 10) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
if (atoip(ptr + 10, &cfg.defaultgw)) {
fprintf(stderr, "Error: invalid IP address\n");
exit(1);
}
}
else
warning_feature_disabled("networking");
#endif
return 0;
}
if (strcmp(ptr, "apparmor") == 0) {
#ifdef HAVE_APPARMOR
arg_apparmor = 1;
#endif
return 0;
}
if (strncmp(ptr, "protocol ", 9) == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP)) {
if (cfg.protocol) {
fwarning("a protocol list is present, the new list \"%s\" will not be installed\n", ptr + 9);
return 0;
}
// store list
cfg.protocol = strdup(ptr + 9);
if (!cfg.protocol)
errExit("strdup");
}
else
warning_feature_disabled("seccomp");
#endif
return 0;
}
if (strncmp(ptr, "env ", 4) == 0) {
env_store(ptr + 4, SETENV);
return 0;
}
if (strncmp(ptr, "rmenv ", 6) == 0) {
env_store(ptr + 6, RMENV);
return 0;
}
// seccomp drop list on top of default list
if (strncmp(ptr, "seccomp ", 8) == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP)) {
arg_seccomp = 1;
cfg.seccomp_list = seccomp_check_list(ptr + 8);
}
else if (!arg_quiet)
warning_feature_disabled("seccomp");
#endif
return 0;
}
// seccomp drop list without default list
if (strncmp(ptr, "seccomp.drop ", 13) == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP)) {
arg_seccomp = 1;
cfg.seccomp_list_drop = seccomp_check_list(ptr + 13);
}
else
warning_feature_disabled("seccomp");
#endif
return 0;
}
// seccomp keep list
if (strncmp(ptr, "seccomp.keep ", 13) == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP)) {
arg_seccomp = 1;
cfg.seccomp_list_keep= seccomp_check_list(ptr + 13);
}
else
warning_feature_disabled("seccomp");
#endif
return 0;
}
// caps drop list
if (strncmp(ptr, "caps.drop ", 10) == 0) {
arg_caps_drop = 1;
arg_caps_list = strdup(ptr + 10);
if (!arg_caps_list)
errExit("strdup");
// verify caps list and exit if problems
caps_check_list(arg_caps_list, NULL);
return 0;
}
// caps keep list
if (strncmp(ptr, "caps.keep ", 10) == 0) {
arg_caps_keep = 1;
arg_caps_list = strdup(ptr + 10);
if (!arg_caps_list)
errExit("strdup");
// verify caps list and exit if problems
caps_check_list(arg_caps_list, NULL);
return 0;
}
// hostname
if (strncmp(ptr, "hostname ", 9) == 0) {
cfg.hostname = ptr + 9;
return 0;
}
// hosts-file
if (strncmp(ptr, "hosts-file ", 11) == 0) {
cfg.hosts_file = fs_check_hosts_file(ptr + 11);
return 0;
}
// dns
if (strncmp(ptr, "dns ", 4) == 0) {
uint32_t dns;
if (atoip(ptr + 4, &dns)) {
fprintf(stderr, "Error: invalid DNS server IP address\n");
return 1;
}
if (cfg.dns1 == 0)
cfg.dns1 = dns;
else if (cfg.dns2 == 0)
cfg.dns2 = dns;
else if (cfg.dns3 == 0)
cfg.dns3 = dns;
else {
fprintf(stderr, "Error: up to 3 DNS servers can be specified\n");
return 1;
}
return 0;
}
// cpu affinity
if (strncmp(ptr, "cpu ", 4) == 0) {
read_cpu_list(ptr + 4);
return 0;
}
// nice value
if (strncmp(ptr, "nice ", 4) == 0) {
cfg.nice = atoi(ptr + 5);
if (getuid() != 0 &&cfg.nice < 0)
cfg.nice = 0;
arg_nice = 1;
return 0;
}
// cgroup
if (strncmp(ptr, "cgroup ", 7) == 0) {
set_cgroup(ptr + 7);
return 0;
}
// writable-etc
if (strcmp(ptr, "writable-etc") == 0) {
if (cfg.etc_private_keep) {
fprintf(stderr, "Error: private-etc and writable-etc are mutually exclusive\n");
exit(1);
}
arg_writable_etc = 1;
return 0;
}
if (strcmp(ptr, "machine-id") == 0) {
arg_machineid = 1;
return 0;
}
// writable-var
if (strcmp(ptr, "writable-var") == 0) {
arg_writable_var = 1;
return 0;
}
if (strcmp(ptr, "writable-var-log") == 0) {
arg_writable_var_log = 1;
return 0;
}
// private directory
if (strncmp(ptr, "private ", 8) == 0) {
cfg.home_private = ptr + 8;
fs_check_private_dir();
arg_private = 1;
return 0;
}
if (strcmp(ptr, "x11 none") == 0) {
arg_x11_block = 1;
return 0;
}
if (strcmp(ptr, "x11 xephyr") == 0) {
#ifdef HAVE_X11
if (checkcfg(CFG_X11)) {
char *x11env = getenv("FIREJAIL_X11");
if (x11env && strcmp(x11env, "yes") == 0) {
return 0;
}
else {
// start x11
x11_start_xephyr(cfg.original_argc, cfg.original_argv);
exit(0);
}
}
else
warning_feature_disabled("x11");
#endif
return 0;
}
if (strcmp(ptr, "x11 xorg") == 0) {
#ifdef HAVE_X11
if (checkcfg(CFG_X11))
arg_x11_xorg = 1;
else
warning_feature_disabled("x11");
#endif
return 0;
}
if (strcmp(ptr, "x11 xpra") == 0) {
#ifdef HAVE_X11
if (checkcfg(CFG_X11)) {
char *x11env = getenv("FIREJAIL_X11");
if (x11env && strcmp(x11env, "yes") == 0) {
return 0;
}
else {
// start x11
x11_start_xpra(cfg.original_argc, cfg.original_argv);
exit(0);
}
}
else
warning_feature_disabled("x11");
#endif
return 0;
}
if (strcmp(ptr, "x11 xvfb") == 0) {
#ifdef HAVE_X11
if (checkcfg(CFG_X11)) {
char *x11env = getenv("FIREJAIL_X11");
if (x11env && strcmp(x11env, "yes") == 0) {
return 0;
}
else {
// start x11
x11_start_xvfb(cfg.original_argc, cfg.original_argv);
exit(0);
}
}
else
warning_feature_disabled("x11");
#endif
return 0;
}
if (strcmp(ptr, "x11") == 0) {
#ifdef HAVE_X11
if (checkcfg(CFG_X11)) {
char *x11env = getenv("FIREJAIL_X11");
if (x11env && strcmp(x11env, "yes") == 0) {
return 0;
}
else {
// start x11
x11_start(cfg.original_argc, cfg.original_argv);
exit(0);
}
}
else
warning_feature_disabled("x11");
#endif
return 0;
}
// private /etc list of files and directories
if (strncmp(ptr, "private-etc ", 12) == 0) {
if (arg_writable_etc) {
fprintf(stderr, "Error: --private-etc and --writable-etc are mutually exclusive\n");
exit(1);
}
if (cfg.etc_private_keep) {
if ( asprintf(&cfg.etc_private_keep, "%s,%s", cfg.etc_private_keep, ptr + 12) < 0 )
errExit("asprintf");
} else {
cfg.etc_private_keep = ptr + 12;
}
arg_private_etc = 1;
return 0;
}
// private /opt list of files and directories
if (strncmp(ptr, "private-opt ", 12) == 0) {
if (cfg.opt_private_keep) {
if ( asprintf(&cfg.opt_private_keep, "%s,%s", cfg.opt_private_keep, ptr + 12) < 0 )
errExit("asprintf");
} else {
cfg.opt_private_keep = ptr + 12;
}
arg_private_opt = 1;
return 0;
}
// private /srv list of files and directories
if (strncmp(ptr, "private-srv ", 12) == 0) {
if (cfg.srv_private_keep) {
if ( asprintf(&cfg.srv_private_keep, "%s,%s", cfg.srv_private_keep, ptr + 12) < 0 )
errExit("asprintf");
} else {
cfg.srv_private_keep = ptr + 12;
}
arg_private_srv = 1;
return 0;
}
// private /bin list of files
if (strncmp(ptr, "private-bin ", 12) == 0) {
if (cfg.bin_private_keep) {
if ( asprintf(&cfg.bin_private_keep, "%s,%s", cfg.bin_private_keep, ptr + 12) < 0 )
errExit("asprintf");
} else {
cfg.bin_private_keep = ptr + 12;
}
arg_private_bin = 1;
return 0;
}
#ifdef HAVE_OVERLAYFS
if (strncmp(ptr, "overlay-named ", 14) == 0) {
if (checkcfg(CFG_OVERLAYFS)) {
if (cfg.chrootdir) {
fprintf(stderr, "Error: --overlay and --chroot options are mutually exclusive\n");
exit(1);
}
struct stat s;
if (stat("/proc/sys/kernel/grsecurity", &s) == 0) {
fprintf(stderr, "Error: --overlay option is not available on Grsecurity systems\n");
exit(1);
}
arg_overlay = 1;
arg_overlay_keep = 1;
arg_overlay_reuse = 1;
char *subdirname = ptr + 14;
if (subdirname == '\0') {
fprintf(stderr, "Error: invalid overlay option\n");
exit(1);
}
// check name
invalid_filename(subdirname);
if (strstr(subdirname, "..") || strstr(subdirname, "/")) {
fprintf(stderr, "Error: invalid overlay name\n");
exit(1);
}
cfg.overlay_dir = fs_check_overlay_dir(subdirname, arg_overlay_reuse);
}
return 0;
} else if (strcmp(ptr, "overlay-tmpfs") == 0) {
if (checkcfg(CFG_OVERLAYFS)) {
if (cfg.chrootdir) {
fprintf(stderr, "Error: --overlay and --chroot options are mutually exclusive\n");
exit(1);
}
struct stat s;
if (stat("/proc/sys/kernel/grsecurity", &s) == 0) {
fprintf(stderr, "Error: --overlay option is not available on Grsecurity systems\n");
exit(1);
}
arg_overlay = 1;
return 0;
}
} else if (strcmp(ptr, "overlay") == 0) {
if (checkcfg(CFG_OVERLAYFS)) {
if (cfg.chrootdir) {
fprintf(stderr, "Error: --overlay and --chroot options are mutually exclusive\n");
exit(1);
}
struct stat s;
if (stat("/proc/sys/kernel/grsecurity", &s) == 0) {
fprintf(stderr, "Error: --overlay option is not available on Grsecurity systems\n");
exit(1);
}
arg_overlay = 1;
arg_overlay_keep = 1;
char *subdirname;
if (asprintf(&subdirname, "%d", getpid()) == -1)
errExit("asprintf");
cfg.overlay_dir = fs_check_overlay_dir(subdirname, arg_overlay_reuse);
free(subdirname);
return 0;
}
}
#endif
// filesystem bind
if (strncmp(ptr, "bind ", 5) == 0) {
#ifdef HAVE_BIND
if (checkcfg(CFG_BIND)) {
if (getuid() != 0) {
fprintf(stderr, "Error: --bind option is available only if running as root\n");
exit(1);
}
// extract two directories
char *dname1 = ptr + 5;
char *dname2 = split_comma(dname1); // this inserts a '0 to separate the two dierctories
if (dname2 == NULL) {
fprintf(stderr, "Error: missing second directory for bind\n");
exit(1);
}
// check directories
invalid_filename(dname1);
invalid_filename(dname2);
if (strstr(dname1, "..") || strstr(dname2, "..")) {
fprintf(stderr, "Error: invalid file name.\n");
exit(1);
}
if (is_link(dname1) || is_link(dname2)) {
fprintf(stderr, "Symbolic links are not allowed for bind command\n");
exit(1);
}
// insert comma back
*(dname2 - 1) = ',';
return 1;
}
else
warning_feature_disabled("bind");
#endif
return 0;
}
// rlimit
if (strncmp(ptr, "rlimit", 6) == 0) {
if (strncmp(ptr, "rlimit-nofile ", 14) == 0) {
check_unsigned(ptr + 14, "Error: invalid rlimit in profile file: ");
sscanf(ptr + 14, "%llu", &cfg.rlimit_nofile);
arg_rlimit_nofile = 1;
}
else if (strncmp(ptr, "rlimit-nproc ", 13) == 0) {
check_unsigned(ptr + 13, "Error: invalid rlimit in profile file: ");
sscanf(ptr + 13, "%llu", &cfg.rlimit_nproc);
arg_rlimit_nproc = 1;
}
else if (strncmp(ptr, "rlimit-fsize ", 13) == 0) {
check_unsigned(ptr + 13, "Error: invalid rlimit in profile file: ");
sscanf(ptr + 13, "%llu", &cfg.rlimit_fsize);
arg_rlimit_fsize = 1;
}
else if (strncmp(ptr, "rlimit-sigpending ", 18) == 0) {
check_unsigned(ptr + 18, "Error: invalid rlimit in profile file: ");
sscanf(ptr + 18, "%llu", &cfg.rlimit_sigpending);
arg_rlimit_sigpending = 1;
}
else {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
return 0;
}
if (strncmp(ptr, "join-or-start ", 14) == 0) {
// try to join by name only
pid_t pid;
if (!name2pid(ptr + 14, &pid)) {
if (!cfg.shell && !arg_shell_none)
cfg.shell = guess_shell();
// find first non-option arg
int i;
for (i = 1; i < cfg.original_argc && strncmp(cfg.original_argv[i], "--", 2) != 0; i++);
join(pid, cfg.original_argc,cfg.original_argv, i + 1);
exit(0);
}
// set sandbox name and start normally
cfg.name = ptr + 14;
if (strlen(cfg.name) == 0) {
fprintf(stderr, "Error: invalid sandbox name\n");
exit(1);
}
return 0;
}
// rest of filesystem
if (strncmp(ptr, "blacklist ", 10) == 0)
ptr += 10;
else if (strncmp(ptr, "blacklist-nolog ", 16) == 0)
ptr += 16;
else if (strncmp(ptr, "noblacklist ", 12) == 0)
ptr += 12;
else if (strncmp(ptr, "whitelist ", 10) == 0) {
#ifdef HAVE_WHITELIST
if (checkcfg(CFG_WHITELIST)) {
arg_whitelist = 1;
ptr += 10;
}
else
return 0;
#else
return 0;
#endif
}
else if (strncmp(ptr, "nowhitelist ", 12) == 0)
ptr += 12;
else if (strncmp(ptr, "read-only ", 10) == 0)
ptr += 10;
else if (strncmp(ptr, "read-write ", 11) == 0)
ptr += 11;
else if (strncmp(ptr, "noexec ", 7) == 0)
ptr += 7;
else if (strncmp(ptr, "tmpfs ", 6) == 0) {
if (getuid() != 0) {
fprintf(stderr, "Error: tmpfs available only when running the sandbox as root\n");
exit(1);
}
ptr += 6;
}
else {
if (lineno == 0)
fprintf(stderr, "Error: \"%s\" as a command line option is invalid\n", ptr);
else if (fname != NULL)
fprintf(stderr, "Error: line %d in %s is invalid\n", lineno, fname);
else
fprintf(stderr, "Error: line %d in the custom profile is invalid\n", lineno);
exit(1);
}
// some characters just don't belong in filenames
invalid_filename(ptr);
if (strstr(ptr, "..")) {
if (lineno == 0)
fprintf(stderr, "Error: \"%s\" is an invalid filename\n", ptr);
else if (fname != NULL)
fprintf(stderr, "Error: line %d in %s is invalid\n", lineno, fname);
else
fprintf(stderr, "Error: line %d in the custom profile is invalid\n", lineno);
exit(1);
}
return 1;
}
// check profile line; if line == 0, this was generated from a command line option
// return 1 if the command is to be added to the linked list of profile commands
// return 0 if the command was already executed inside the function
int profile_check_line(char *ptr, int lineno) {
// check ignore list
int i;
for (i = 0; i < MAX_PROFILE_IGNORE; i++) {
if (cfg.profile_ignore[i] == NULL)
break;
if (strncmp(ptr, cfg.profile_ignore[i], strlen(cfg.profile_ignore[i])) == 0)
return 0; // ignore line
}
if (strncmp(ptr, "ignore ", 7) == 0) {
char *str = strdup(ptr + 7);
if (*str == '\0') {
fprintf(stderr, "Error: invalid ignore option\n");
exit(1);
}
// find an empty entry in profile_ignore array
int j;
for (j = 0; j < MAX_PROFILE_IGNORE; j++) {
if (cfg.profile_ignore[j] == NULL)
break;
}
if (j >= MAX_PROFILE_IGNORE) {
fprintf(stderr, "Error: maximum %d --ignore options are permitted\n", MAX_PROFILE_IGNORE);
exit(1);
}
// ... and configure it
cfg.profile_ignore[j] = str;
return 0;
}
// seccomp, caps, private, user namespace
if (strcmp(ptr, "noroot") == 0) {
check_user_namespace();
return 0;
}
else if (strcmp(ptr, "seccomp") == 0) {
arg_seccomp = 1;
return 0;
}
else if (strcmp(ptr, "caps") == 0) {
arg_caps_default_filter = 1;
return 0;
}
else if (strcmp(ptr, "caps.drop all") == 0) {
arg_caps_drop_all = 1;
return 0;
}
else if (strcmp(ptr, "shell none") == 0) {
arg_shell_none = 1;
return 0;
}
else if (strcmp(ptr, "private") == 0) {
arg_private = 1;
return 0;
}
else if (strcmp(ptr, "private-dev") == 0) {
arg_private_dev = 1;
return 0;
}
else if (strcmp(ptr, "nogroups") == 0) {
arg_nogroups = 1;
return 0;
}
else if (strcmp(ptr, "netfilter") == 0) {
arg_netfilter = 1;
return 0;
}
else if (strncmp(ptr, "netfilter ", 10) == 0) {
arg_netfilter = 1;
arg_netfilter_file = strdup(ptr + 10);
if (!arg_netfilter_file)
errExit("strdup");
check_netfilter_file(arg_netfilter_file);
return 0;
}
else if (strcmp(ptr, "net none") == 0) {
arg_nonetwork = 1;
cfg.bridge0.configured = 0;
cfg.bridge1.configured = 0;
cfg.bridge2.configured = 0;
cfg.bridge3.configured = 0;
return 0;
}
if (strncmp(ptr, "protocol ", 9) == 0) {
protocol_store(ptr + 9);
return 0;
}
if (strncmp(ptr, "env ", 4) == 0) {
env_store(ptr + 4);
return 0;
}
// seccomp drop list on top of default list
if (strncmp(ptr, "seccomp ", 8) == 0) {
arg_seccomp = 1;
#ifdef HAVE_SECCOMP
cfg.seccomp_list = strdup(ptr + 8);
if (!cfg.seccomp_list)
errExit("strdup");
#endif
return 0;
}
// seccomp drop list without default list
if (strncmp(ptr, "seccomp.drop ", 13) == 0) {
arg_seccomp = 1;
#ifdef HAVE_SECCOMP
cfg.seccomp_list_drop = strdup(ptr + 13);
if (!cfg.seccomp_list_drop)
errExit("strdup");
#endif
return 0;
}
// seccomp keep list
if (strncmp(ptr, "seccomp.keep ", 13) == 0) {
arg_seccomp = 1;
#ifdef HAVE_SECCOMP
cfg.seccomp_list_keep= strdup(ptr + 13);
if (!cfg.seccomp_list_keep)
errExit("strdup");
#endif
return 0;
}
// caps drop list
if (strncmp(ptr, "caps.drop ", 10) == 0) {
arg_caps_drop = 1;
arg_caps_list = strdup(ptr + 10);
if (!arg_caps_list)
errExit("strdup");
// verify seccomp list and exit if problems
if (caps_check_list(arg_caps_list, NULL))
exit(1);
return 0;
}
// caps keep list
if (strncmp(ptr, "caps.keep ", 10) == 0) {
arg_caps_keep = 1;
arg_caps_list = strdup(ptr + 10);
if (!arg_caps_list)
errExit("strdup");
// verify seccomp list and exit if problems
if (caps_check_list(arg_caps_list, NULL))
exit(1);
return 0;
}
// dns
if (strncmp(ptr, "dns ", 4) == 0) {
uint32_t dns;
if (atoip(ptr + 4, &dns)) {
fprintf(stderr, "Error: invalid DNS server IP address\n");
return 1;
}
if (cfg.dns1 == 0)
cfg.dns1 = dns;
else if (cfg.dns2 == 0)
cfg.dns2 = dns;
else if (cfg.dns3 == 0)
cfg.dns3 = dns;
else {
fprintf(stderr, "Error: up to 3 DNS servers can be specified\n");
return 1;
}
return 0;
}
// cpu affinity
if (strncmp(ptr, "cpu ", 4) == 0) {
read_cpu_list(ptr + 4);
return 0;
}
// cgroup
if (strncmp(ptr, "cgroup ", 7) == 0) {
set_cgroup(ptr + 7);
return 0;
}
// private directory
if (strncmp(ptr, "private ", 8) == 0) {
cfg.home_private = ptr + 8;
fs_check_private_dir();
arg_private = 1;
return 0;
}
// private home list of files and directories
if ((strncmp(ptr, "private.keep ", 13) == 0)
|| (strncmp(ptr, "private-home ", 13) == 0)) {
cfg.home_private_keep = ptr + 13;
fs_check_home_list();
arg_private = 1;
return 0;
}
// private /etc list of files and directories
if (strncmp(ptr, "private-etc ", 12) == 0) {
cfg.etc_private_keep = ptr + 12;
fs_check_etc_list();
arg_private_etc = 1;
return 0;
}
// private /bin list of files
if (strncmp(ptr, "private-bin ", 12) == 0) {
cfg.bin_private_keep = ptr + 12;
fs_check_bin_list();
arg_private_bin = 1;
return 0;
}
// filesystem bind
if (strncmp(ptr, "bind ", 5) == 0) {
if (getuid() != 0) {
fprintf(stderr, "Error: --bind option is available only if running as root\n");
exit(1);
}
// extract two directories
char *dname1 = ptr + 5;
char *dname2 = split_comma(dname1); // this inserts a '0 to separate the two dierctories
if (dname2 == NULL) {
fprintf(stderr, "Error: mising second directory for bind\n");
exit(1);
}
// check directories
invalid_filename(dname1);
invalid_filename(dname2);
if (strstr(dname1, "..") || strstr(dname2, "..")) {
fprintf(stderr, "Error: invalid file name.\n");
exit(1);
}
// insert comma back
*(dname2 - 1) = ',';
return 1;
}
// rlimit
if (strncmp(ptr, "rlimit", 6) == 0) {
if (strncmp(ptr, "rlimit-nofile ", 14) == 0) {
ptr += 14;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_nofile);
arg_rlimit_nofile = 1;
}
else if (strncmp(ptr, "rlimit-nproc ", 13) == 0) {
ptr += 13;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_nproc);
arg_rlimit_nproc = 1;
}
else if (strncmp(ptr, "rlimit-fsize ", 13) == 0) {
ptr += 13;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_fsize);
arg_rlimit_fsize = 1;
}
else if (strncmp(ptr, "rlimit-sigpending ", 18) == 0) {
ptr += 18;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_sigpending);
arg_rlimit_sigpending = 1;
}
else {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
return 0;
}
// rest of filesystem
if (strncmp(ptr, "blacklist ", 10) == 0)
ptr += 10;
else if (strncmp(ptr, "noblacklist ", 12) == 0)
ptr += 12;
else if (strncmp(ptr, "whitelist ", 10) == 0) {
arg_whitelist = 1;
ptr += 10;
}
else if (strncmp(ptr, "read-only ", 10) == 0)
ptr += 10;
else if (strncmp(ptr, "tmpfs ", 6) == 0)
ptr += 6;
else {
if (lineno == 0)
fprintf(stderr, "Error: \"%s\" as a command line option is invalid\n", ptr);
else
fprintf(stderr, "Error: line %d in the custom profile is invalid\n", lineno);
exit(1);
}
// some characters just don't belong in filenames
invalid_filename(ptr);
if (strstr(ptr, "..")) {
if (lineno == 0)
fprintf(stderr, "Error: \"%s\" is an invalid filename\n", ptr);
else
fprintf(stderr, "Error: line %d in the custom profile is invalid\n", lineno);
exit(1);
}
return 1;
}
// check profile line; if line == 0, this was generated from a command line option
// return 1 if the command is to be added to the linked list of profile commands
// return 0 if the command was already executed inside the function
int profile_check_line(char *ptr, int lineno, const char *fname) {
EUID_ASSERT();
// check ignore list
int i;
for (i = 0; i < MAX_PROFILE_IGNORE; i++) {
if (cfg.profile_ignore[i] == NULL)
break;
if (strncmp(ptr, cfg.profile_ignore[i], strlen(cfg.profile_ignore[i])) == 0)
return 0; // ignore line
}
if (strncmp(ptr, "ignore ", 7) == 0) {
char *str = strdup(ptr + 7);
if (*str == '\0') {
fprintf(stderr, "Error: invalid ignore option\n");
exit(1);
}
// find an empty entry in profile_ignore array
int j;
for (j = 0; j < MAX_PROFILE_IGNORE; j++) {
if (cfg.profile_ignore[j] == NULL)
break;
}
if (j >= MAX_PROFILE_IGNORE) {
fprintf(stderr, "Error: maximum %d --ignore options are permitted\n", MAX_PROFILE_IGNORE);
exit(1);
}
// ... and configure it
else
cfg.profile_ignore[j] = str;
return 0;
}
// mkdir
if (strncmp(ptr, "mkdir ", 6) == 0) {
fs_mkdir(ptr + 6);
return 0;
}
// sandbox name
else if (strncmp(ptr, "name ", 5) == 0) {
cfg.name = ptr + 5;
if (strlen(cfg.name) == 0) {
fprintf(stderr, "Error: invalid sandbox name\n");
exit(1);
}
return 0;
}
else if (strcmp(ptr, "ipc-namespace") == 0) {
arg_ipc = 1;
return 0;
}
// seccomp, caps, private, user namespace
else if (strcmp(ptr, "noroot") == 0) {
#if HAVE_USERNS
if (checkcfg(CFG_USERNS))
check_user_namespace();
else
fprintf(stderr, "Warning: user namespace feature is disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strcmp(ptr, "nonewprivs") == 0) {
arg_nonewprivs = 1;
return 0;
}
else if (strcmp(ptr, "seccomp") == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP))
arg_seccomp = 1;
else
fprintf(stderr, "Warning: user seccomp feature is disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strcmp(ptr, "caps") == 0) {
arg_caps_default_filter = 1;
return 0;
}
else if (strcmp(ptr, "caps.drop all") == 0) {
arg_caps_drop_all = 1;
return 0;
}
else if (strcmp(ptr, "shell none") == 0) {
arg_shell_none = 1;
return 0;
}
else if (strcmp(ptr, "tracelog") == 0) {
arg_tracelog = 1;
return 0;
}
else if (strcmp(ptr, "private") == 0) {
arg_private = 1;
return 0;
}
else if (strcmp(ptr, "private-dev") == 0) {
arg_private_dev = 1;
return 0;
}
else if (strcmp(ptr, "private-tmp") == 0) {
arg_private_tmp = 1;
return 0;
}
else if (strcmp(ptr, "nogroups") == 0) {
arg_nogroups = 1;
return 0;
}
else if (strcmp(ptr, "nosound") == 0) {
arg_nosound = 1;
arg_private_dev = 1;
return 0;
}
else if (strcmp(ptr, "netfilter") == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK))
arg_netfilter = 1;
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strncmp(ptr, "netfilter ", 10) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
arg_netfilter = 1;
arg_netfilter_file = strdup(ptr + 10);
if (!arg_netfilter_file)
errExit("strdup");
check_netfilter_file(arg_netfilter_file);
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strncmp(ptr, "netfilter6 ", 11) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
arg_netfilter6 = 1;
arg_netfilter6_file = strdup(ptr + 11);
if (!arg_netfilter6_file)
errExit("strdup");
check_netfilter_file(arg_netfilter6_file);
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strcmp(ptr, "net none") == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
arg_nonetwork = 1;
cfg.bridge0.configured = 0;
cfg.bridge1.configured = 0;
cfg.bridge2.configured = 0;
cfg.bridge3.configured = 0;
cfg.interface0.configured = 0;
cfg.interface1.configured = 0;
cfg.interface2.configured = 0;
cfg.interface3.configured = 0;
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strncmp(ptr, "net ", 4) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
#ifdef HAVE_NETWORK_RESTRICTED
// compile time restricted networking
if (getuid() != 0) {
fprintf(stderr, "Error: only \"net none\" is allowed to non-root users\n");
exit(1);
}
#endif
// run time restricted networking
if (checkcfg(CFG_RESTRICTED_NETWORK) && getuid() != 0) {
fprintf(stderr, "Error: only \"net none\" is allowed to non-root users\n");
exit(1);
}
if (strcmp(ptr + 4, "lo") == 0) {
fprintf(stderr, "Error: cannot attach to lo device\n");
exit(1);
}
Bridge *br;
if (cfg.bridge0.configured == 0)
br = &cfg.bridge0;
else if (cfg.bridge1.configured == 0)
br = &cfg.bridge1;
else if (cfg.bridge2.configured == 0)
br = &cfg.bridge2;
else if (cfg.bridge3.configured == 0)
br = &cfg.bridge3;
else {
fprintf(stderr, "Error: maximum 4 network devices are allowed\n");
exit(1);
}
net_configure_bridge(br, ptr + 4);
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strncmp(ptr, "iprange ", 8) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (br->iprange_start || br->iprange_end) {
fprintf(stderr, "Error: cannot configure the IP range twice for the same interface\n");
exit(1);
}
// parse option arguments
char *firstip = ptr + 8;
char *secondip = firstip;
while (*secondip != '\0') {
if (*secondip == ',')
break;
secondip++;
}
if (*secondip == '\0') {
fprintf(stderr, "Error: invalid IP range\n");
exit(1);
}
*secondip = '\0';
secondip++;
// check addresses
if (atoip(firstip, &br->iprange_start) || atoip(secondip, &br->iprange_end) ||
br->iprange_start >= br->iprange_end) {
fprintf(stderr, "Error: invalid IP range\n");
exit(1);
}
if (in_netrange(br->iprange_start, br->ip, br->mask) || in_netrange(br->iprange_end, br->ip, br->mask)) {
fprintf(stderr, "Error: IP range addresses not in network range\n");
exit(1);
}
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
// from here
else if (strncmp(ptr, "mac ", 4) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (mac_not_zero(br->macsandbox)) {
fprintf(stderr, "Error: cannot configure the MAC address twice for the same interface\n");
exit(1);
}
// read the address
if (atomac(ptr + 4, br->macsandbox)) {
fprintf(stderr, "Error: invalid MAC address\n");
exit(1);
}
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strncmp(ptr, "mtu ", 4) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (sscanf(ptr + 4, "%d", &br->mtu) != 1 || br->mtu < 576 || br->mtu > 9198) {
fprintf(stderr, "Error: invalid mtu value\n");
exit(1);
}
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strncmp(ptr, "ip ", 3) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (br->arg_ip_none || br->ipsandbox) {
fprintf(stderr, "Error: cannot configure the IP address twice for the same interface\n");
exit(1);
}
// configure this IP address for the last bridge defined
if (strcmp(ptr + 3, "none") == 0)
br->arg_ip_none = 1;
else {
if (atoip(ptr + 3, &br->ipsandbox)) {
fprintf(stderr, "Error: invalid IP address\n");
exit(1);
}
}
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strncmp(ptr, "ip6 ", 4) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
Bridge *br = last_bridge_configured();
if (br == NULL) {
fprintf(stderr, "Error: no network device configured\n");
exit(1);
}
if (br->arg_ip_none || br->ip6sandbox) {
fprintf(stderr, "Error: cannot configure the IP address twice for the same interface\n");
exit(1);
}
// configure this IP address for the last bridge defined
// todo: verify ipv6 syntax
br->ip6sandbox = ptr + 4;
// if (atoip(argv[i] + 5, &br->ipsandbox)) {
// fprintf(stderr, "Error: invalid IP address\n");
// exit(1);
// }
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
else if (strncmp(ptr, "defaultgw ", 10) == 0) {
#ifdef HAVE_NETWORK
if (checkcfg(CFG_NETWORK)) {
if (atoip(ptr + 10, &cfg.defaultgw)) {
fprintf(stderr, "Error: invalid IP address\n");
exit(1);
}
}
else
fprintf(stderr, "Warning: networking features are disabled in Firejail configuration file\n");
#endif
return 0;
}
if (strncmp(ptr, "protocol ", 9) == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP))
protocol_store(ptr + 9);
else
fprintf(stderr, "Warning: user seccomp feature is disabled in Firejail configuration file\n");
#endif
return 0;
}
if (strncmp(ptr, "env ", 4) == 0) {
env_store(ptr + 4);
return 0;
}
// seccomp drop list on top of default list
if (strncmp(ptr, "seccomp ", 8) == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP)) {
arg_seccomp = 1;
cfg.seccomp_list = strdup(ptr + 8);
if (!cfg.seccomp_list)
errExit("strdup");
}
else
fprintf(stderr, "Warning: user seccomp feature is disabled in Firejail configuration file\n");
#endif
return 0;
}
// seccomp drop list without default list
if (strncmp(ptr, "seccomp.drop ", 13) == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP)) {
arg_seccomp = 1;
cfg.seccomp_list_drop = strdup(ptr + 13);
if (!cfg.seccomp_list_drop)
errExit("strdup");
}
else
fprintf(stderr, "Warning: user seccomp feature is disabled in Firejail configuration file\n");
#endif
return 0;
}
// seccomp keep list
if (strncmp(ptr, "seccomp.keep ", 13) == 0) {
#ifdef HAVE_SECCOMP
if (checkcfg(CFG_SECCOMP)) {
arg_seccomp = 1;
cfg.seccomp_list_keep= strdup(ptr + 13);
if (!cfg.seccomp_list_keep)
errExit("strdup");
}
else
fprintf(stderr, "Warning: user seccomp feature is disabled in Firejail configuration file\n");
#endif
return 0;
}
// caps drop list
if (strncmp(ptr, "caps.drop ", 10) == 0) {
arg_caps_drop = 1;
arg_caps_list = strdup(ptr + 10);
if (!arg_caps_list)
errExit("strdup");
// verify seccomp list and exit if problems
if (caps_check_list(arg_caps_list, NULL))
exit(1);
return 0;
}
// caps keep list
if (strncmp(ptr, "caps.keep ", 10) == 0) {
arg_caps_keep = 1;
arg_caps_list = strdup(ptr + 10);
if (!arg_caps_list)
errExit("strdup");
// verify seccomp list and exit if problems
if (caps_check_list(arg_caps_list, NULL))
exit(1);
return 0;
}
// hostname
if (strncmp(ptr, "hostname ", 9) == 0) {
cfg.hostname = ptr + 9;
return 0;
}
// dns
if (strncmp(ptr, "dns ", 4) == 0) {
uint32_t dns;
if (atoip(ptr + 4, &dns)) {
fprintf(stderr, "Error: invalid DNS server IP address\n");
return 1;
}
if (cfg.dns1 == 0)
cfg.dns1 = dns;
else if (cfg.dns2 == 0)
cfg.dns2 = dns;
else if (cfg.dns3 == 0)
cfg.dns3 = dns;
else {
fprintf(stderr, "Error: up to 3 DNS servers can be specified\n");
return 1;
}
return 0;
}
// cpu affinity
if (strncmp(ptr, "cpu ", 4) == 0) {
read_cpu_list(ptr + 4);
return 0;
}
// nice value
if (strncmp(ptr, "nice ", 4) == 0) {
cfg.nice = atoi(ptr + 5);
if (getuid() != 0 &&cfg.nice < 0)
cfg.nice = 0;
arg_nice = 1;
return 0;
}
// cgroup
if (strncmp(ptr, "cgroup ", 7) == 0) {
set_cgroup(ptr + 7);
return 0;
}
// writable-etc
if (strcmp(ptr, "writable-etc") == 0) {
if (cfg.etc_private_keep) {
fprintf(stderr, "Error: private-etc and writable-etc are mutually exclusive\n");
exit(1);
}
arg_writable_etc = 1;
return 0;
}
// writable-var
if (strcmp(ptr, "writable-var") == 0) {
arg_writable_var = 1;
return 0;
}
// private directory
if (strncmp(ptr, "private ", 8) == 0) {
cfg.home_private = ptr + 8;
fs_check_private_dir();
arg_private = 1;
return 0;
}
// private /etc list of files and directories
if (strncmp(ptr, "private-etc ", 12) == 0) {
if (arg_writable_etc) {
fprintf(stderr, "Error: --private-etc and --writable-etc are mutually exclusive\n");
exit(1);
}
cfg.etc_private_keep = ptr + 12;
fs_check_etc_list();
arg_private_etc = 1;
return 0;
}
// private /bin list of files
if (strncmp(ptr, "private-bin ", 12) == 0) {
cfg.bin_private_keep = ptr + 12;
arg_private_bin = 1;
fs_check_bin_list();
return 0;
}
// filesystem bind
if (strncmp(ptr, "bind ", 5) == 0) {
#ifdef HAVE_BIND
if (checkcfg(CFG_BIND)) {
if (getuid() != 0) {
fprintf(stderr, "Error: --bind option is available only if running as root\n");
exit(1);
}
// extract two directories
char *dname1 = ptr + 5;
char *dname2 = split_comma(dname1); // this inserts a '0 to separate the two dierctories
if (dname2 == NULL) {
fprintf(stderr, "Error: missing second directory for bind\n");
exit(1);
}
// check directories
invalid_filename(dname1);
invalid_filename(dname2);
if (strstr(dname1, "..") || strstr(dname2, "..")) {
fprintf(stderr, "Error: invalid file name.\n");
exit(1);
}
if (is_link(dname1) || is_link(dname2)) {
fprintf(stderr, "Symbolic links are not allowed for bind command\n");
exit(1);
}
// insert comma back
*(dname2 - 1) = ',';
return 1;
}
else {
fprintf(stderr, "Warning: bind feature is disabled in Firejail configuration file\n");
return 0;
}
#else
return 0;
#endif
}
// rlimit
if (strncmp(ptr, "rlimit", 6) == 0) {
if (strncmp(ptr, "rlimit-nofile ", 14) == 0) {
ptr += 14;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_nofile);
arg_rlimit_nofile = 1;
}
else if (strncmp(ptr, "rlimit-nproc ", 13) == 0) {
ptr += 13;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_nproc);
arg_rlimit_nproc = 1;
}
else if (strncmp(ptr, "rlimit-fsize ", 13) == 0) {
ptr += 13;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_fsize);
arg_rlimit_fsize = 1;
}
else if (strncmp(ptr, "rlimit-sigpending ", 18) == 0) {
ptr += 18;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_sigpending);
arg_rlimit_sigpending = 1;
}
else {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
return 0;
}
// read-write
if (strncmp(ptr, "read-write ", 11) == 0) {
if (getuid() != 0) {
fprintf(stderr, "Error: read-write command is available only for root user\n");
exit(1);
}
fs_rdwr_add(ptr + 11);
return 0;
}
// rest of filesystem
if (strncmp(ptr, "blacklist ", 10) == 0)
ptr += 10;
else if (strncmp(ptr, "blacklist-nolog ", 16) == 0)
ptr += 16;
else if (strncmp(ptr, "noblacklist ", 12) == 0)
ptr += 12;
else if (strncmp(ptr, "whitelist ", 10) == 0) {
#ifdef HAVE_WHITELIST
if (checkcfg(CFG_WHITELIST)) {
arg_whitelist = 1;
ptr += 10;
}
else
return 0;
#else
return 0;
#endif
}
else if (strncmp(ptr, "read-only ", 10) == 0)
ptr += 10;
else if (strncmp(ptr, "tmpfs ", 6) == 0) {
if (getuid() != 0) {
fprintf(stderr, "Error: tmpfs available only when running the sandbox as root\n");
exit(1);
}
ptr += 6;
}
else {
if (lineno == 0)
fprintf(stderr, "Error: \"%s\" as a command line option is invalid\n", ptr);
else if (fname != NULL)
fprintf(stderr, "Error: line %d in %s is invalid\n", lineno, fname);
else
fprintf(stderr, "Error: line %d in the custom profile is invalid\n", lineno);
exit(1);
}
// some characters just don't belong in filenames
invalid_filename(ptr);
if (strstr(ptr, "..")) {
if (lineno == 0)
fprintf(stderr, "Error: \"%s\" is an invalid filename\n", ptr);
else if (fname != NULL)
fprintf(stderr, "Error: line %d in %s is invalid\n", lineno, fname);
else
fprintf(stderr, "Error: line %d in the custom profile is invalid\n", lineno);
exit(1);
}
return 1;
}
// check profile line; if line == 0, this was generated from a command line option
// return 1 if the command is to be added to the linked list of profile commands
// return 0 if the command was already executed inside the function
int profile_check_line(char *ptr, int lineno) {
// seccomp, caps, private, user namespace
if (strcmp(ptr, "noroot") == 0) {
check_user_namespace();
return 0;
}
else if (strcmp(ptr, "seccomp") == 0) {
arg_seccomp = 1;
return 0;
}
else if (strcmp(ptr, "caps") == 0) {
arg_caps_default_filter = 1;
return 0;
}
else if (strcmp(ptr, "caps.drop all") == 0) {
arg_caps_drop_all = 1;
return 0;
}
else if (strcmp(ptr, "shell none") == 0) {
arg_shell_none = 1;
return 0;
}
else if (strcmp(ptr, "private") == 0) {
arg_private = 1;
return 0;
}
else if (strcmp(ptr, "private-dev") == 0) {
arg_private_dev = 1;
return 0;
}
else if (strcmp(ptr, "nogroups") == 0) {
arg_nogroups = 1;
return 0;
}
else if (strcmp(ptr, "netfilter") == 0) {
arg_netfilter = 1;
return 0;
}
else if (strncmp(ptr, "netfilter ", 10) == 0) {
arg_netfilter = 1;
arg_netfilter_file = strdup(ptr + 10);
if (!arg_netfilter_file)
errExit("strdup");
check_netfilter_file(arg_netfilter_file);
return 0;
}
// seccomp drop list on top of default list
if (strncmp(ptr, "seccomp ", 8) == 0) {
arg_seccomp = 1;
#ifdef HAVE_SECCOMP
arg_seccomp_list = strdup(ptr + 8);
if (!arg_seccomp_list)
errExit("strdup");
#endif
return 0;
}
// seccomp drop list without default list
if (strncmp(ptr, "seccomp.drop ", 13) == 0) {
arg_seccomp = 1;
#ifdef HAVE_SECCOMP
arg_seccomp_list_drop = strdup(ptr + 13);
if (!arg_seccomp_list_drop)
errExit("strdup");
#endif
return 0;
}
// seccomp keep list
if (strncmp(ptr, "seccomp.keep ", 13) == 0) {
arg_seccomp = 1;
#ifdef HAVE_SECCOMP
arg_seccomp_list_keep= strdup(ptr + 13);
if (!arg_seccomp_list_keep)
errExit("strdup");
#endif
return 0;
}
// caps drop list
if (strncmp(ptr, "caps.drop ", 10) == 0) {
arg_caps_drop = 1;
arg_caps_list = strdup(ptr + 10);
if (!arg_caps_list)
errExit("strdup");
// verify seccomp list and exit if problems
if (caps_check_list(arg_caps_list, NULL))
exit(1);
return 0;
}
// caps keep list
if (strncmp(ptr, "caps.keep ", 10) == 0) {
arg_caps_keep = 1;
arg_caps_list = strdup(ptr + 10);
if (!arg_caps_list)
errExit("strdup");
// verify seccomp list and exit if problems
if (caps_check_list(arg_caps_list, NULL))
exit(1);
return 0;
}
// dns
if (strncmp(ptr, "dns ", 4) == 0) {
uint32_t dns;
if (atoip(ptr + 4, &dns)) {
fprintf(stderr, "Error: invalid DNS server IP address\n");
return 1;
}
if (cfg.dns1 == 0)
cfg.dns1 = dns;
else if (cfg.dns2 == 0)
cfg.dns2 = dns;
else if (cfg.dns3 == 0)
cfg.dns3 = dns;
else {
fprintf(stderr, "Error: up to 3 DNS servers can be specified\n");
return 1;
}
return 0;
}
// cpu affinity
if (strncmp(ptr, "cpu ", 4) == 0) {
read_cpu_list(ptr + 4);
return 0;
}
// cgroup
if (strncmp(ptr, "cgroup ", 7) == 0) {
set_cgroup(ptr + 7);
return 0;
}
// private directory
if (strncmp(ptr, "private ", 8) == 0) {
cfg.home_private = ptr + 8;
fs_check_private_dir();
arg_private = 1;
return 0;
}
// private list of files and directories
if (strncmp(ptr, "private.keep ", 13) == 0) {
cfg.home_private_keep = ptr + 13;
fs_check_home_list();
arg_private = 1;
return 0;
}
// filesystem bind
if (strncmp(ptr, "bind ", 5) == 0) {
if (getuid() != 0) {
fprintf(stderr, "Error: --bind option is available only if running as root\n");
exit(1);
}
// extract two directories
char *dname1 = ptr + 5;
char *dname2 = split_comma(dname1); // this inserts a '0 to separate the two dierctories
if (dname2 == NULL) {
fprintf(stderr, "Error: mising second directory for bind\n");
exit(1);
}
// check directories
check_file_name(dname1, lineno);
check_file_name(dname2, lineno);
if (strstr(dname1, "..") || strstr(dname2, "..")) {
fprintf(stderr, "Error: invalid file name.\n");
exit(1);
}
// insert comma back
*(dname2 - 1) = ',';
return 1;
}
// rlimit
if (strncmp(ptr, "rlimit", 6) == 0) {
if (strncmp(ptr, "rlimit-nofile ", 14) == 0) {
ptr += 14;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_nofile);
arg_rlimit_nofile = 1;
}
else if (strncmp(ptr, "rlimit-nproc ", 13) == 0) {
ptr += 13;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_nproc);
arg_rlimit_nproc = 1;
}
else if (strncmp(ptr, "rlimit-fsize ", 13) == 0) {
ptr += 13;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_fsize);
arg_rlimit_fsize = 1;
}
else if (strncmp(ptr, "rlimit-sigpending ", 18) == 0) {
ptr += 18;
if (not_unsigned(ptr)) {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
sscanf(ptr, "%u", &cfg.rlimit_sigpending);
arg_rlimit_sigpending = 1;
}
else {
fprintf(stderr, "Invalid rlimit option on line %d\n", lineno);
exit(1);
}
return 0;
}
// rest of filesystem
if (strncmp(ptr, "blacklist ", 10) == 0)
ptr += 10;
else if (strncmp(ptr, "read-only ", 10) == 0)
ptr += 10;
else if (strncmp(ptr, "tmpfs ", 6) == 0)
ptr += 6;
else {
if (lineno == 0)
fprintf(stderr, "Error: \"%s\" as a command line option is invalid\n", ptr);
else
fprintf(stderr, "Error: line %d in the custom profile is invalid\n", lineno);
exit(1);
}
// some characters just don't belong in filenames
check_file_name(ptr, lineno);
if (strstr(ptr, "..")) {
if (lineno == 0)
fprintf(stderr, "Error: \"%s\" is an invalid filename\n", ptr);
else
fprintf(stderr, "Error: line %d in the custom profile is invalid\n", lineno);
exit(1);
}
return 1;
}