CVE-2014-5206
Description
The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 3.16.2-1 |
| debian | bullseye | fixed | 3.16.2-1 |
| debian | forky | fixed | 3.16.2-1 |
| debian | sid | fixed | 3.16.2-1 |
| debian | trixie | fixed | 3.16.2-1 |
| linux-kernel | affected | 3.10.55 | |
| ubuntu | 12.04 | affected | |
| ubuntu | 14.04 | affected | |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a6138db815df5ee542d848318e5dae681590fccd
- http://www.openwall.com/lists/oss-security/2014/08/13/4
- http://www.securityfocus.com/bid/69214
- http://www.ubuntu.com/usn/USN-2317-1
- http://www.ubuntu.com/usn/USN-2318-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1129662
- https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd
- https://security-tracker.debian.org/tracker/CVE-2014-5206
CWEs
CWE-269
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.