Vulnerability CVE-2014-5207
Published: 2014-08-18

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.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux Kernel 3.16.1 FUSE Privilege Escalation
Andy Lutomirski,...
09.10.2014

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:H/Au:S/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6/10
10/10
1.5/10
Exploit range
Attack complexity
Authentication
Local
High
Single time
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Linux -> Linux kernel 

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