USN-4754-2: Python regression

Releases

• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

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)

Update instructions

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

Ubuntu 18.04

• python2.7 - 2.7.17-1~18.04ubuntu1.5
• python2.7-minimal - 2.7.17-1~18.04ubuntu1.5

Ubuntu 16.04

• python2.7 - 2.7.12-1ubuntu0~16.04.16
• python2.7-minimal - 2.7.12-1ubuntu0~16.04.16

Ubuntu 14.04

• python2.7 - 2.7.6-8ubuntu0.6+esm9
  Available with Ubuntu Pro
• python2.7-minimal - 2.7.6-8ubuntu0.6+esm9
  Available with Ubuntu Pro

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

References

• https://launchpad.net/bugs/1916893