[USN-4973-1] Python vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Tue Jun 1 13:13:36 UTC 2021

Ubuntu Security Notice USN-4973-1
June 01, 2021

python3.8 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS


Python could allow unintended access to network services.

Software Description:
- python3.8: An interactive high-level object-oriented language


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 20.10:
  python3.8                       3.8.6-1ubuntu0.3
  python3.8-minimal               3.8.6-1ubuntu0.3

Ubuntu 20.04 LTS:
  python3.8                       3.8.5-1~20.04.3
  python3.8-minimal               3.8.5-1~20.04.3

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


Package Information:

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