USN-4668-3: python-apt regression

Releases

• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• 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.

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

• python-apt - 2.0.0ubuntu0.20.04.3
• python3-apt - 2.0.0ubuntu0.20.04.3

Ubuntu 18.04

• python-apt - 1.6.5ubuntu0.5
• python3-apt - 1.6.5ubuntu0.5

Ubuntu 16.04

• 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.

References

• https://launchpad.net/bugs/1907676