USN-4552-3: Pam-python regression

USN-4552-3: Pam-python regression

USN-4552-1 and USN-4552-2 fixed a vulnerability in Pam-python. The update
introduced a regression which prevented PAM modules written in Python from
importing python modules from site-specific directories.

We apologize for the inconvenience.

Original advisory details:

Malte Kraus discovered that Pam-python mishandled certain environment variables.
A local attacker could potentially use this vulnerability to execute programs
as root.
Source: USN-4552-3: Pam-python regression