CVE-2014-5207

MEDIUM

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.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9566d6742852c527bf5af38af5cbb878dad75705

http://osvdb.org/show/osvdb/110055

http://packetstormsecurity.com/files/128595/Linux-Kernel-3.16.1-FUSE-Privilege-Escalation.html

http://seclists.org/oss-sec/2014/q3/352

http://www.exploit-db.com/exploits/34923

http://www.openwall.com/lists/oss-security/2014/08/13/4

http://www.securityfocus.com/bid/69216

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://exchange.xforce.ibmcloud.com/vulnerabilities/95266

https://github.com/torvalds/linux/commit/9566d6742852c527bf5af38af5cbb878dad75705

Details

Source: MITRE

Published: 2014-08-18

Updated: 2020-08-14

Type: CWE-269

Risk Information

CVSS v2.0

Base Score: 6.2

Vector: AV:L/AC:H/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 1.9

Severity: MEDIUM