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.

Category

7.2
CVSS
Severity: High
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a6138db815df5ee542d848318e5dae681590fccd
http://www.ubuntu.com/usn/USN-2318-1 third party advisory vendor advisory
http://www.securityfocus.com/bid/69214 vdb entry third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1129662 issue tracking third party advisory patch
https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd third party advisory patch
http://www.openwall.com/lists/oss-security/2014/08/13/4 third party advisory mailing list
http://www.ubuntu.com/usn/USN-2317-1 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2014-5206?
CVE-2014-5206 has been scored as a high severity vulnerability.
How to fix CVE-2014-5206?
To fix CVE-2014-5206, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2014-5206 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2014-5206 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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