A python-apt regression update has been released for Debian GNU/Linux 9 LTS to address a segmentation fault regression introduced by the previous update.

DLA 2488-2: python-apt regression update

- -----------------------------------------------------------------------
Debian LTS Advisory DLA-2488-2 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
December 26, 2020   https://wiki.debian.org/LTS
- -----------------------------------------------------------------------

Package : python-apt
Version : 1.4.3
Debian Bug : 977000

The update for python-apt released as 2488-1 introduced a regression
by causing a segmentation fault, which is now fixed with this update.

For Debian 9 stretch, this problem has been fixed in version
1.4.3.

We recommend that you upgrade your python-apt packages.

For the detailed security status of python-apt please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/python-apt

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS