Stack-based buffer overflow in linux-pam - CVE-2011-3148
Published: July 22, 2012 / Updated: May 9, 2023
Vulnerability identifier: #VU43802
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-3148
CWE-ID: CWE-121
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the _assemble_line() function in modules/pam_env/pam_env.c when processing a long string of white spaces at the beginning of the ~/.pam_environment file. A local user can trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Affected software
linux-pam
Amazon Linux AMI
Gentoo Linux
SUSE Linux
Amazon Linux AMI
Gentoo Linux
SUSE Linux
How to mitigate CVE-2011-3148
Install update from vendor's website.
linux-pam - update to 1.1.5
External References
- http://git.fedorahosted.org/git/?p=linux-pam.git;a=commitdiff;h=caf5e7f61c8d9288daa49b4f61962e6b1239121d
- 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/874469