Ubuntu 20.10 USN-4668-3 Moderate: python-apt Resource Regression

ubuntu

January 4, 2021

USN-4668-1 introduced a regression in python-apt.

Summary

USN-4668-1 introduced a regression in python-apt.

Software Description:

- python-apt: Python interface to libapt-pkg

Details:

USN-4668-1 fixed vulnerabilities in python-apt. The update caused a

regression when using certain APIs with a file handle. This update fixes

the problem.

We apologize for the inconvenience.

Original advisory details:

Kevin Backhouse discovered that python-apt incorrectly handled resources. A

local attacker could possibly use this issue to cause python-apt to consume

resources, leading to a denial of service.

Topics Covered

security advisory denial of service update Ubuntu moderate severity resource management python-apt

Update Instructions

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

Ubuntu 20.10:
  python3-apt                     2.1.3ubuntu1.3

Ubuntu 20.04 LTS:
  python-apt                      2.0.0ubuntu0.20.04.3
  python3-apt                     2.0.0ubuntu0.20.04.3

Ubuntu 18.04 LTS:
  python-apt                      1.6.5ubuntu0.5
  python3-apt                     1.6.5ubuntu0.5

Ubuntu 16.04 LTS:
  python-apt                      1.1.0~beta1ubuntu0.16.04.11
  python3-apt                     1.1.0~beta1ubuntu0.16.04.11

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