Input validation error in Linux kernel - CVE-2012-4565

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Main Vulnerability Database Vulnerabilities #VU43237

Input validation error in Linux kernel - CVE-2012-4565

Published: December 21, 2012 / Updated: August 11, 2020


Vulnerability identifier: #VU43237
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2012-4565
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading TCP stats.


Affected software

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-image-2.6.32-350-ec2 (Ubuntu package)
linux-lts-backport-oneiric (Ubuntu package)
linux-lts-quantal (Ubuntu package)

How to mitigate CVE-2012-4565

Install update from vendor's website.

linux (Ubuntu package) - addressed in versions 2.6.24-32.106, 2.6.32-45.100, 3.0.0-28.45, 3.2.0-34.53, 3.5.0-19.30
linux-image-2.6.32-350-ec2 (Ubuntu package) - update to 2.6.32-350.57
linux-lts-backport-oneiric (Ubuntu package) - update to 3.0.0-28.45~lucid1
linux-lts-quantal (Ubuntu package) - update to 3.5.0-22.34~precise1

External References

Related Security Bulletins