diff options
| author | Michal Schmidt <mschmidt@redhat.com> | 2012-03-02 10:39:10 +0100 |
|---|---|---|
| committer | Michal Schmidt <mschmidt@redhat.com> | 2012-03-16 18:33:02 +0100 |
| commit | 5ebff5337594d690b322078c512eb222d34aaa82 (patch) | |
| tree | fa41ee9d34437f1fcc914f31cff51c6b7808c579 | |
| parent | 16f1239e1ece27257c0deedcf01aa39474f66241 (diff) | |
util: never follow symlinks in rm_rf_children()
The function checks if the entry is a directory before recursing, but
there is a window between the check and the open, during which the
directory could be replaced with a symlink.
CVE-2012-1174
https://bugzilla.redhat.com/show_bug.cgi?id=803358
| -rw-r--r-- | src/util.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/util.c b/src/util.c index 20cbc2b0db..dfc1dc6b85 100644 --- a/src/util.c +++ b/src/util.c @@ -3593,7 +3593,8 @@ static int rm_rf_children(int fd, bool only_dirs, bool honour_sticky) { if (is_dir) { int subdir_fd; - if ((subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)) < 0) { + subdir_fd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW); + if (subdir_fd < 0) { if (ret == 0 && errno != ENOENT) ret = -errno; continue; |