CVE-2011-3149 Information

Description

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).

Reference

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