CVE-2014-5207

Public Exploit

Description

fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID, and MNT_NOEXEC and changing MNT_ATIME_MASK during a remount of a bind mount, which allows local users to gain privileges, interfere with backups and auditing on systems that had atime enabled, or cause a denial of service (excessive filesystem updating) on systems that had atime disabled via a "mount -o remount" command within a user namespace.

Category

6.2
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.23%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/69216 vdb entry third party advisory
http://seclists.org/oss-sec/2014/q3/352 third party advisory mailing list
https://github.com/torvalds/linux/commit/9566d6742852c527bf5af38af5cbb878dad75705 third party advisory patch
http://www.ubuntu.com/usn/USN-2318-1 third party advisory vendor advisory
http://osvdb.org/show/osvdb/110055 vdb entry broken link
http://www.exploit-db.com/exploits/34923 exploit vdb entry third party advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9566d6742852c527bf5af38af5cbb878dad75705
https://bugzilla.redhat.com/show_bug.cgi?id=1129662 issue tracking third party advisory patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/95266 vdb entry third party advisory
http://packetstormsecurity.com/files/128595/Linux-Kernel-3.16.1-FUSE-Privilege-Escalation.html exploit vdb entry third party advisory
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-2014-5207?
CVE-2014-5207 has been scored as a medium severity vulnerability.
How to fix CVE-2014-5207?
To fix CVE-2014-5207, 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-2014-5207 being actively exploited in the wild?
It is possible that CVE-2014-5207 is being exploited or will be exploited in a near future based on public information. 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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