Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.8, < 3.10.55 |
| Canonical | Ubuntu Linux | 12.04 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://www.openwall.com/lists/oss-security/2014/08/13/4Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/69214Third Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2317-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2318-1Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1129662Issue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccPatchThird Party Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://www.openwall.com/lists/oss-security/2014/08/13/4Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/69214Third Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2317-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2318-1Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1129662Issue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccPatchThird Party Advisory
FAQ
What is CVE-2014-5206?
CVE-2014-5206 is a vulnerability with a CVSS score of 7.2 (HIGH). 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 intende...
How severe is CVE-2014-5206?
CVE-2014-5206 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2014-5206?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Canonical Ubuntu Linux.