USN-1766-1: pam-xdg-support vulnerability

Ubuntu Security Notice USN-1766-1

18th March, 2013

pam-xdg-support vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.10

Summary

pam-xdg-support could be made to run programs as an administrator.

Software description

  • pam-xdg-support - PAM module for XDG_RUNTIME_DIR support

Details

Zbigniew Tenerowicz and Sebastian Krzyszkowiak discovered that
pam-xdg-support incorrectly handled the PATH environment variable. A local
attacker could use this issue in combination with sudo to possibly escalate
privileges.

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 12.10:
libpam-xdg-support 0.2-0ubuntu1.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2013-1052