CVE-2014-5206

 

Published at: - 18-08-2014 01:15

Last modified: - 21-09-2022 08:44

Total changes: - 2

Description

The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a6138db815df5ee542d848318e5dae681590fccd
• https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd
• [oss-security] 20140813 Re: CVE Request: ro bind mount bypass using user namespaces-Mailing List, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1129662
• USN-2317-1-Third Party Advisory
• USN-2318-1-Third Party Advisory
• 69214-Third Party Advisory, VDB Entry

 

Keywords

NVD

 

CVE-2014-5206

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures