CVE-2014-5207 Information

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.

Reference

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