USN-4754-2: Python regression

Publication date

25 February 2021

Overview

USN-4754-1 introduced a regression in Python2.7.


Packages

  • python2.7 - An interactive high-level object-oriented language

Details

USN-4754-1 fixed a vulnerability in Python. The fix for CVE-2021-3177 introduced a
regression in Python 2.7. This update reverts the security fix pending further investigation.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Python incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code
or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)

USN-4754-1 fixed a vulnerability in Python. The fix for CVE-2021-3177 introduced a
regression in Python 2.7. This update reverts the security fix pending further investigation.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Python incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code
or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic python2.7 –  2.7.17-1~18.04ubuntu1.5
python2.7-minimal –  2.7.17-1~18.04ubuntu1.5
16.04 xenial python2.7 –  2.7.12-1ubuntu0~16.04.16
python2.7-minimal –  2.7.12-1ubuntu0~16.04.16
14.04 trusty python2.7 –  2.7.6-8ubuntu0.6+esm9  
python2.7-minimal –  2.7.6-8ubuntu0.6+esm9  

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