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Ubuntu 18.04: USN-4754-2 Moderate: Python Regression Issue

ubuntu
Calendar Grey February 25, 2021
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-4755-3 highlights a critical library vulnerability impacting various editions. Prompt intervention advised.
USN-4754-1 introduced a regression in Python2.7.

Summary

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

Software Description:

- 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)

Topics%20covered

Topics Covered

security advisory moderate denial of service code execution ubuntu python regression python regression

Update Instructions

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

Ubuntu 18.04 LTS:
  python2.7                       2.7.17-1~18.04ubuntu1.5
  python2.7-minimal               2.7.17-1~18.04ubuntu1.5

Ubuntu 16.04 LTS:
  python2.7                       2.7.12-1ubuntu0~16.04.16
  python2.7-minimal               2.7.12-1ubuntu0~16.04.16

Ubuntu 14.04 ESM:
  python2.7                       2.7.6-8ubuntu0.6+esm9
  python2.7-minimal               2.7.6-8ubuntu0.6+esm9

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

References

https://ubuntu.com/security/notices/USN-4754-2

https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/1916893

Severity
important
Lowest
Low
Medium
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Critical

February 25, 2021

Topics%20covered

Topics Covered

security advisory moderate denial of service code execution ubuntu python regression python regression

Package Information

https://launchpad.net/ubuntu/+source/python2.7/2.7.17-1~18.04ubuntu1.5
https://launchpad.net/ubuntu/+source/python2.7/2.7.12-1ubuntu0~16.04.16

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