Double free vulnerability in the PyPAM_conv in PAMmodule.c in PyPam 0.5.0 and earlier allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a NULL byte in a password string.
https://security.gentoo.org/glsa/201507-09
https://exchange.xforce.ibmcloud.com/vulnerabilities/73857
http://www.debian.org/security/2012/dsa-2430
http://ubuntu.com/usn/usn-1395-1
http://secunia.com/advisories/48746
http://secunia.com/advisories/48332
http://secunia.com/advisories/48312
http://lists.opensuse.org/opensuse-updates/2012-04/msg00027.html