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USN-4973-2: Python vulnerability

4 October 2021

Python could allow unintended access to network services.



  • python3.8 - An interactive high-level object-oriented language


USN-4973-1 fixed this vulnerability previously, but it was re-introduced
in python3.8 in focal because of the SRU in LP: #1928057. This update fixes
the problem.

Original advisory details:

It was discovered that the Python stdlib ipaddress API incorrectly handled
octal strings. A remote attacker could possibly use this issue to perform a
wide variety of attacks, including bypassing certain access restrictions.

Update instructions

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

Ubuntu 20.04

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

Related notices

  • USN-4973-1: libpython3.8-minimal, idle-python3.8, python3.8-doc, libpython3.8-testsuite, python3.8-examples, libpython3.8-stdlib, python3.8-dev, python3.8, libpython3.8-dev, python3.8-venv, libpython3.8, python3.8-minimal