[USN-4552-3] Pam-python regression

Mike Salvatore mike.salvatore at canonical.com
Wed Oct 28 17:06:05 UTC 2020

Ubuntu Security Notice USN-4552-3
October 28, 2020

pam-python regression

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS


USN-4552-1 and USN-4552-2 introduced a regression in Pam-python

Software Description:
- pam-python: Enables PAM modules to be written in Python


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.

Update instructions:

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

Ubuntu 18.04 LTS:
  libpam-python                   1.0.6-1.1+deb10u1ubuntu0.1

Ubuntu 16.04 LTS:
  libpam-python                   1.0.4-1.1+deb8u1ubuntu0.1

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


Package Information:

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