PT-2014-6345 · Linux+3 · Linux Kernel+3

Kenton Varda · Published 2014-08-13 · Updated 2023-08-25 · CVE-2014-5206

Positive Technologies (AI Summary)

CVSS v2.0

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 3.16.2

Description The issue allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms. This is achieved via a "mount -o remount" command within a user namespace, exploiting the fact that the do remount function in fs/namespace.c does not maintain the MNT LOCK READONLY bit across a remount of a bind mount.

Recommendations For Linux kernel versions prior to 3.16.2, update to version 3.16.2 or later to resolve the issue. As a temporary workaround, consider restricting the use of the "mount -o remount" command within user namespaces to minimize the risk of exploitation.

Exploit

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

ALT-PU-2014-2023

ALT-PU-2014-2024

ALT-PU-2014-2025

ALT-PU-2014-2106

ALT-PU-2015-1794

CVE-2014-5206

OPENSUSE-SU-2014_1677-1

USN-2317-1

USN-2318-1

Affected Products

Alt Linux

Linux Kernel

Suse

Ubuntu

References · 26

• 🔥 https://github.com/retme7/CVE-2014-4322_poc · Exploit
• 🔥 https://github.com/panyu6325/CVE-2015-1805 · Exploit
• 🔥 https://github.com/laginimaineb/cve-2014-4322 · Exploit
• 🔥 https://github.com/marcograss/cve-2014-4323 · Exploit
• 🔥 https://github.com/RKX1209/CVE-2014-9322 · Exploit
• 🔥 https://github.com/FloatingGuy/cve-2015-1805 · Exploit
• 🔥 https://github.com/ireshchaminda1/Android-Privilege-Escalation-Remote-Access-Vulnerability-CVE-2015-1805 · Exploit
• https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2014-5206 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2014-5206 · Vendor Advisory
• https://ubuntu.com/security/CVE-2014-5207 · Vendor Advisory
• https://osv.dev/vulnerability/USN-2318-1 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1129662 · Patch
• https://ubuntu.com/security/notices/USN-2318-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-2317-1 · Vendor Advisory