PT-2012-3829 · Linux+3 · Linux Kernel+3

Petr Matousek · Published 2012-05-29 · Updated 2023-10-12 · CVE-2012-2136

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 3.4.5

Description The issue is related to the sock alloc send pskb function in the Linux kernel, which does not properly validate a certain length value. This can be exploited by local users to cause a denial of service, resulting in a heap-based buffer overflow and system crash, or potentially gain privileges. The exploitation requires access to a TUN/TAP device.

Recommendations For Linux kernel versions prior to 3.4.5, update to version 3.4.5 or later to resolve the issue. As a temporary workaround, consider restricting access to TUN/TAP devices to minimize the risk of exploitation.

Exploit

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CESA-2012_0743

CVE-2012-2136

RHSA-2012:0690

RHSA-2012:0743

RHSA-2012:1087

RHSA-2012_0690

RHSA-2012_0743

SUSE-SU-2015:0481-1

USN-1514-1

USN-1529-1

USN-1530-1

USN-1531-1

USN-1532-1

USN-1533-1

USN-1534-1

USN-1535-1

USN-1538-1

USN-1539-1

USN-1598-1

Affected Products

Centos

Linux Kernel

Red Hat

Suse

References · 32

• 🔥 https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc · Exploit
• http://rhn.redhat.com/errata/RHSA-2012-0743.html · Vendor Advisory
• http://kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5 · Vendor Advisory
• http://rhn.redhat.com/errata/RHSA-2012-1087.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2012-2136 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2012-2136 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2012-0743.html · Vendor Advisory
• https://ubuntu.com/security/notices/USN-1538-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-1535-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-1514-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2012-2136 · Security Note
• https://ubuntu.com/security/notices/USN-1534-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-1598-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2012-2136 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-1529-1 · Vendor Advisory