CVE-2014-5207
MEDIUM severity · CVSS 6.2 · Improper privilege management
6.2CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityHigh
Privileges required—
User interaction—
Confidentiality impact—
Integrity impact—
Availability impact—
Exploit probability (EPSS)1%
AV:L/AC:H/Au:N/C:C/I:C/A:C
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9566d6742852c527bf5af38af5cbb878dad75705
- http://osvdb.org/show/osvdb/110055
- http://seclists.org/oss-sec/2014/q3/352Advisory
- http://www.openwall.com/lists/oss-security/2014/08/13/4Advisory
- http://www.securityfocus.com/bid/69216Advisory
- http://www.ubuntu.com/usn/USN-2317-1Advisory
- http://packetstormsecurity.com/files/128595/Linux-Kernel-3.16.1-FUSE-Privilege-Escalation.htmlAdvisory
- http://www.exploit-db.com/exploits/34923Advisory