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path: root/lib/libalpm/be_sync.c
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-rw-r--r--lib/libalpm/be_sync.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/libalpm/be_sync.c b/lib/libalpm/be_sync.c
index 1cbe055e..f9fd5d1f 100644
--- a/lib/libalpm/be_sync.c
+++ b/lib/libalpm/be_sync.c
@@ -479,6 +479,33 @@ cleanup:
return count;
}
+/* This function validates %FILENAME%. filename must be between 3 and
+ * PATH_MAX characters and cannot be contain a path */
+static int _alpm_validate_filename(alpm_db_t *db, const char *pkgname,
+ const char *filename)
+{
+ size_t len = strlen(filename);
+
+ if(filename[0] == '.') {
+ errno = EINVAL;
+ _alpm_log(db->handle, ALPM_LOG_ERROR, _("%s database is inconsistent: filename "
+ "of package %s is illegal\n"), db->treename, pkgname);
+ return -1;
+ } else if(memchr(filename, '/', len) != NULL) {
+ errno = EINVAL;
+ _alpm_log(db->handle, ALPM_LOG_ERROR, _("%s database is inconsistent: filename "
+ "of package %s is illegal\n"), db->treename, pkgname);
+ return -1;
+ } else if(len > PATH_MAX) {
+ errno = EINVAL;
+ _alpm_log(db->handle, ALPM_LOG_ERROR, _("%s database is inconsistent: filename "
+ "of package %s is too long\n"), db->treename, pkgname);
+ return -1;
+ }
+
+ return 0;
+}
+
#define READ_NEXT() do { \
if(_alpm_archive_fgets(archive, &buf) != ARCHIVE_OK) goto error; \
line = buf.line; \
@@ -558,6 +585,9 @@ static int sync_db_read(alpm_db_t *db, struct archive *archive,
}
} else if(strcmp(line, "%FILENAME%") == 0) {
READ_AND_STORE(pkg->filename);
+ if(_alpm_validate_filename(db, pkg->name, pkg->filename) < 0) {
+ return -1;
+ }
} else if(strcmp(line, "%DESC%") == 0) {
READ_AND_STORE(pkg->desc);
} else if(strcmp(line, "%GROUPS%") == 0) {