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Ubuntu 20.04 LTS USN-4973-2 Critical: Python Network Access Risk

ubuntu
Calendar Grey October 4, 2021
Dist Ubuntu Esm H88
Ubuntu Security Announcement USN-4973-2 highlights a vulnerability in Python that may permit unauthorized entry to network resources. Users are advised to update.
Python could allow unintended access to network services.

Summary

Python could allow unintended access to network services.

Software Description:

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

Details:

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.

Topics%20covered

Topics Covered

security advisory critical issue ubuntu python network access

Update Instructions

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

Ubuntu 20.04 LTS:
  python3.8                       3.8.10-0ubuntu1~20.04.1
  python3.8-minimal               3.8.10-0ubuntu1~20.04.1

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

References

https://ubuntu.com/security/notices/USN-4973-2

https://ubuntu.com/security/notices/USN-4973-1

CVE-2021-29921,

Severity
critical
Lowest
Low
Medium
High
Critical

October 04, 2021

Topics%20covered

Topics Covered

security advisory critical issue ubuntu python network access

Package Information

https://launchpad.net/ubuntu/+source/python3.8/3.8.10-0ubuntu1~20.04.1

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