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AUSCERT External Security Bulletin Redistribution
USN-4973-1: Python vulnerability
2 June 2021
AusCERT Security Bulletin Summary
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
CVE Names: CVE-2021-29921
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running Python check for an updated version of the software for
their operating system.
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USN-4973-1: Python vulnerability
01 June 2021
Python could allow unintended access to network services.
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o 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.
The problem can be corrected by updating your system to the following package
o python3.8-minimal - 3.8.6-1ubuntu0.3
o python3.8 - 3.8.6-1ubuntu0.3
o python3.8-minimal - 3.8.5-1~20.04.3
o python3.8 - 3.8.5-1~20.04.3
In general, a standard system update will make all the necessary changes.
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