CVE-2011-4122

Severity: medium (CVSS 6.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2011-11-17 · updated 2026-06-16
Weakness: CWE-22

Description

Directory traversal vulnerability in openpam_configure.c in OpenPAM before r478 on FreeBSD 8.1 allows local users to load arbitrary DSOs and gain privileges via a .. (dot dot) in the service_name argument to the pam_start function, as demonstrated by a .. in the -c option to kcheckpass.

Affected products

FreeBSD: 8.1

References

http://c-skills.blogspot.com/2011/11/openpam-trickery.html
http://openwall.com/lists/oss-security/2011/12/07/3
http://openwall.com/lists/oss-security/2011/12/08/9
http://osvdb.org/76945
http://secunia.com/advisories/46756
http://secunia.com/advisories/46804
http://stealth.openwall.net/xSports/pamslam
http://trac.des.no/openpam/changeset/478/trunk/lib/openpam_configure.c
https://exchange.xforce.ibmcloud.com/vulnerabilities/71205
http://c-skills.blogspot.com/2011/11/openpam-trickery.html
http://openwall.com/lists/oss-security/2011/12/07/3
http://openwall.com/lists/oss-security/2011/12/08/9

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