Пример #1
0
static void
check_vulnerable(struct pkg_audit *audit, struct pkgdb *db, int sock)
{
	struct pkgdb_it	*it = NULL;
	struct pkg		*pkg = NULL;
	kh_pkgs_t		*check = NULL;
	const char		*uid;
	UT_string		*sb;
	int				ret;
	FILE			*out;

	out = fdopen(sock, "w");
	if (out == NULL) {
		warn("unable to open stream");
		return;
	}

	if ((it = pkgdb_query(db, NULL, MATCH_ALL)) == NULL) {
		warnx("Error accessing the package database");
		pkg_audit_free(audit);
		fclose(out);
		return;
	}
	else {
		check = kh_init_pkgs();

		while ((ret = pkgdb_it_next(it, &pkg, PKG_LOAD_BASIC|PKG_LOAD_RDEPS))
				== EPKG_OK) {
			add_to_check(check, pkg);
			pkg = NULL;
		}

		ret = EX_OK;
	}

	if (db != NULL) {
		pkgdb_it_free(it);
		pkgdb_close(db);
	}

	if (ret != EX_OK) {
		pkg_audit_free(audit);
		kh_destroy_pkgs(check);
		fclose(out);
		return;
	}

	drop_privileges();

	if (pkg_audit_load(audit, NULL) != EPKG_OK) {
		warn("unable to open vulnxml file");
		fclose(out);
		pkg_audit_free(audit);
		return;
	}

#ifdef HAVE_CAPSICUM
	if (cap_enter() < 0 && errno != ENOSYS) {
		warn("cap_enter() failed");
		pkg_audit_free(audit);
		kh_destroy_pkgs(check);
		fclose(out);
		return;
	}
#endif

	if (pkg_audit_process(audit) == EPKG_OK) {
		kh_foreach_value(check, pkg, {
				if (pkg_audit_is_vulnerable(audit, pkg, true, &sb)) {
					pkg_get(pkg, PKG_UNIQUEID, &uid);
					fprintf(out, "%s\n", uid);
					fflush(out);
					utstring_free(sb);
				}
				pkg_free(pkg);
		});
Пример #2
0
Файл: audit.c Проект: grembo/pkg
int
exec_audit(int argc, char **argv)
{
	struct pkg_audit	*audit;
	struct pkgdb		*db = NULL;
	struct pkgdb_it		*it = NULL;
	struct pkg		*pkg = NULL;
	const char		*db_dir;
	char			*name;
	char			*version;
	char			 audit_file_buf[MAXPATHLEN];
	char			*audit_file = audit_file_buf;
	unsigned int		 vuln = 0;
	bool			 fetch = false, recursive = false;
	int			 ch, i;
	int			 ret = EX_OK;
	const char		*portaudit_site = NULL;
	struct sbuf		*sb;
	kh_pkgs_t		*check = NULL;

	db_dir = pkg_object_string(pkg_config_get("PKG_DBDIR"));
	snprintf(audit_file_buf, sizeof(audit_file_buf), "%s/vuln.xml", db_dir);

	struct option longopts[] = {
		{ "fetch",	no_argument,		NULL,	'F' },
		{ "file",	required_argument,	NULL,	'f' },
		{ "recursive",	no_argument,	NULL,	'r' },
		{ "quiet",	no_argument,		NULL,	'q' },
		{ NULL,		0,			NULL,	0   },
	};

	while ((ch = getopt_long(argc, argv, "+Ff:qr", longopts, NULL)) != -1) {
		switch (ch) {
		case 'F':
			fetch = true;
			break;
		case 'f':
			audit_file = optarg;
			break;
		case 'q':
			quiet = true;
			break;
		case 'r':
			recursive = true;
			break;
		default:
			usage_audit();
			return(EX_USAGE);
		}
	}
	argc -= optind;
	argv += optind;

	audit = pkg_audit_new();

	if (fetch == true) {
		portaudit_site = pkg_object_string(pkg_config_get("VULNXML_SITE"));
		if (pkg_audit_fetch(portaudit_site, audit_file) != EPKG_OK) {
			pkg_audit_free(audit);
			return (EX_IOERR);
		}
	}

	if (pkg_audit_load(audit, audit_file) != EPKG_OK) {
		if (errno == ENOENT)
			warnx("vulnxml file %s does not exist. "
					"Try running 'pkg audit -F' first",
					audit_file);
		else
			warn("unable to open vulnxml file %s",
					audit_file);

		pkg_audit_free(audit);
		return (EX_DATAERR);
	}

	check = kh_init_pkgs();
	if (argc >= 1) {
		for (i = 0; i < argc; i ++) {
			name = argv[i];
			version = strrchr(name, '-');
			if (version != NULL) {
				version[0] = '\0';
				version++;
			}
			if (pkg_new(&pkg, PKG_FILE) != EPKG_OK)
				err(EX_OSERR, "malloc");
			if (version != NULL)
				pkg_set(pkg, PKG_NAME, name, PKG_VERSION, version);
			else
				pkg_set(pkg, PKG_NAME, name);
			/* Fake uniqueid */
			pkg_set(pkg, PKG_UNIQUEID, name);
			add_to_check(check, pkg);
			pkg = NULL;
		}
	}
	else {

		/*
		 * if the database doesn't exist it just means there are no
		 * packages to audit.
		 */

		ret = pkgdb_access(PKGDB_MODE_READ, PKGDB_DB_LOCAL);
		if (ret == EPKG_ENODB) {
			pkg_audit_free(audit);
			kh_destroy_pkgs(check);
			return (EX_OK);
		} else if (ret == EPKG_ENOACCESS) {
			warnx("Insufficient privileges to read the package database");
			pkg_audit_free(audit);
			kh_destroy_pkgs(check);
			return (EX_NOPERM);
		} else if (ret != EPKG_OK) {
			warnx("Error accessing the package database");
			pkg_audit_free(audit);
			kh_destroy_pkgs(check);
			return (EX_IOERR);
		}

		if (pkgdb_open(&db, PKGDB_DEFAULT) != EPKG_OK) {
			pkg_audit_free(audit);
			kh_destroy_pkgs(check);
			return (EX_IOERR);
		}

		if (pkgdb_obtain_lock(db, PKGDB_LOCK_READONLY) != EPKG_OK) {
			pkgdb_close(db);
			pkg_audit_free(audit);
			kh_destroy_pkgs(check);
			warnx("Cannot get a read lock on a database, it is locked by another process");
			return (EX_TEMPFAIL);
		}

		if ((it = pkgdb_query(db, NULL, MATCH_ALL)) == NULL) {
			warnx("Error accessing the package database");
			ret = EX_IOERR;
		}
		else {
			while ((ret = pkgdb_it_next(it, &pkg, PKG_LOAD_BASIC|PKG_LOAD_RDEPS))
							== EPKG_OK) {
				add_to_check(check, pkg);
				pkg = NULL;
			}
			ret = EX_OK;
		}
		if (db != NULL) {
			pkgdb_it_free(it);
			pkgdb_release_lock(db, PKGDB_LOCK_READONLY);
			pkgdb_close(db);
		}
		if (ret != EX_OK) {
			pkg_audit_free(audit);
			kh_destroy_pkgs(check);
			return (ret);
		}
	}

	/* Now we have vulnxml loaded and check list formed */
#ifdef HAVE_CAPSICUM
	if (cap_enter() < 0 && errno != ENOSYS) {
		warn("cap_enter() failed");
		pkg_audit_free(audit);
		kh_destroy_pkgs(check);
		return (EPKG_FATAL);
	}
#endif

	if (pkg_audit_process(audit) == EPKG_OK) {
		kh_foreach_value(check, pkg, {
			if (pkg_audit_is_vulnerable(audit, pkg, quiet, &sb)) {
				vuln ++;
				printf("%s", sbuf_data(sb));

				if (recursive) {
					const char *name;
					kh_pkgs_t *seen = kh_init_pkgs();

					pkg_get(pkg, PKG_NAME, &name);
					sbuf_clear(sb);
					sbuf_printf(sb, "Packages that depend on %s: ", name);
					print_recursive_rdeps(check, pkg , sb, seen, true);
					sbuf_finish(sb);
					printf("%s\n\n", sbuf_data(sb));

					kh_destroy_pkgs(seen);
				}
				sbuf_delete(sb);
			}
			pkg_free(pkg);
		});