A double-free flaw was found in the way PyPAM, a Pluggable Authentication Module bindings for Python language, processed passwords containing NULL-byte character. If an application used PyPAM module for user authentication without sanitization of user provided input, a remote attacker could use this flaw to cause that application to crash (denial of service) via specially-crafted user password string.
The CVE identifier of CVE-2012-1502 has been previously assigned to this issue.
This issue affects the version of the PyPAM package, as shipped with Red Hat Enterprise Linux 6. -- This issue affects the version of the PyPAM package, as shipped with Red Hat Network Satellite Server v5.4.1 for Red Hat Enterprise Linux 5. -- This issue affects the versions of the PyPAM package, as shipped with Fedora release of 15 and 16. This issue affects the versions of the PyPAM package, as shipped with Fedora EPEL 5 and Fedora EPEL 6.
Public via: [1] http://seclists.org/fulldisclosure/2012/Mar/68
Statement: The Red Hat Security Response Team has rated this issue as having low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Note that it is fixed in Fedora Rawhide - PyPAM-0.5.0-15.fc18