Buffer overflow in linux-pam - CVE-2011-3149
Published: July 22, 2012 / Updated: May 9, 2023
Vulnerability identifier: #VU43803
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2011-3149
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: git.kernel.org
Affected software:
linux-pam
linux-pam
Detailed vulnerability description
The vulnerability allows a local user to perform service disruption.
The _expand_arg function in the pam_env module (modules/pam_env/pam_env.c) in Linux-PAM (aka pam) before 1.1.5 does not properly handle when environment variable expansion can overflow, which allows local users to cause a denial of service (CPU consumption).
How to mitigate CVE-2011-3149
Install update from vendor's website.
Sources
- http://git.fedorahosted.org/git/?p=linux-pam.git;a=commitdiff;h=109823cb621c900c07c4b6cdc99070d354d19444
- http://secunia.com/advisories/46583
- http://secunia.com/advisories/49711
- http://security.gentoo.org/glsa/glsa-201206-31.xml
- http://www.ubuntu.com/usn/USN-1237-1
- https://bugs.launchpad.net/ubuntu/+source/pam/+bug/874565