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CVE-2014-5206

Date: August 18, 2014

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.

Language: C

Severity Score

Related Resources (11)

http://www.ubuntu.com/usn/USN-2318-1
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a6138db815df5ee542d848318e5dae681590fccd
http://www.securityfocus.com/bid/69214
https://nvd.nist.gov/vuln/detail/CVE-2014-5206
http://www.openwall.com/lists/oss-security/2014/08/13/4
http://www.ubuntu.com/usn/USN-2317-1
https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd
https://people.canonical.com/~ubuntu-security/cve/CVE-2014-5206
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a6138db815df5ee542d848318e5dae681590fccd
https://bugzilla.redhat.com/show_bug.cgi?id=1129662
https://www.mend.io/vulnerability-database/CVE-2014-5206

Severity Score

Weakness Type (CWE)

Permissions, Privileges, and Access Control

CWE-264

Improper Privilege Management

CWE-269

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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