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[Launchpad Bug Tracker <1907676@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package python-apt - 2.0.0ubuntu0.20.04.3

---------------
python-apt (2.0.0ubuntu0.20.04.3) focal-security; urgency=medium

  * REGRESSION UPDATE: Passing a file descriptor to apt_inst.ArFile or
    apt_inst.DebFile caused a segmentation fault (LP: #1907676)
    - python/arfile.cc: Fix segmentation fault when opening fd, track
      lifetime correctly

 -- Marc Deslauriers <marc.deslauriers@xxxxxxxxxx>  Thu, 10 Dec 2020
09:46:50 -0500

** Changed in: python-apt (Ubuntu Focal)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1907676

Title:
  segmentation fault when opening fd

Status in python-apt package in Ubuntu:
  Fix Released
Status in python-apt source package in Xenial:
  Fix Released
Status in python-apt source package in Bionic:
  Fix Released
Status in python-apt source package in Focal:
  Fix Released
Status in python-apt source package in Groovy:
  Fix Released
Status in python-apt package in Debian:
  Unknown

Bug description:
  [Impact]

  USN-4668-1 introduced a regression in python-apt when using certain
  APIs with a file handle.

  [Test case]

  # Landscape scenario:
  1) On the Landscape server, create a package profile that installs a single package, 'hello' is enough.
  2) On the Landscape server, apply the package profile to a client
  3) On the Landscape client, verify that there is no segfault message on '/var/log/kern.log'
  4) On the Landscape server, verify that the activity to apply the package profile ends with success.

  Step 3) would show a segfault and step 4), the activity would stay 'In
  Progress' forever.

  # dak scenario:
  dak crashes with a segmentation fault in python3-apt when processing
  uploads or processing the NEW queue on ftp-master; and also on my
  playground server (used to generate the backtrace).

  [Where problems could occurs]

  [Other info]

  See Debian bug:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977000

  Fix:
  https://salsa.debian.org/apt-team/python-apt/-/commit/3d9af5f196ad6a6c6973ac699a15888d21a9bb52

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