Ubuntu 18.04 LTS: USN-4581-1 Critical: Python CRLF Injection

ubuntu

October 14, 2020

Python could be used to perform a CRLF injection if it received a specially crafted request.

Summary

Python could be used to perform a CRLF injection if it received a specially crafted request.

Software Description:

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

- python3.6: An interactive high-level object-oriented language

- python3.5: An interactive high-level object-oriented language

- python3.4: An interactive high-level object-oriented language

Details:

It was discovered that Python incorrectly handled certain character

sequences. A remote attacker could possibly use this issue to perform

CRLF injection.

Topics Covered

security advisory software update remote attack Ubuntu python injection USN-4581-1

Update Instructions

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

Ubuntu 18.04 LTS:
  python2.7                       2.7.17-1~18.04ubuntu1.2
  python2.7-minimal               2.7.17-1~18.04ubuntu1.2
  python3.6                       3.6.9-1~18.04ubuntu1.3
  python3.6-minimal               3.6.9-1~18.04ubuntu1.3

Ubuntu 16.04 LTS:
  python2.7                       2.7.12-1ubuntu0~16.04.13
  python2.7-minimal               2.7.12-1ubuntu0~16.04.13
  python3.5                       3.5.2-2ubuntu0~16.04.12
  python3.5-minimal               3.5.2-2ubuntu0~16.04.12

Ubuntu 14.04 ESM:
  python2.7                       2.7.6-8ubuntu0.6+esm7
  python2.7-minimal               2.7.6-8ubuntu0.6+esm7
  python3.4                       3.4.3-1ubuntu1~14.04.7+esm8
  python3.4-minimal               3.4.3-1ubuntu1~14.04.7+esm8

Ubuntu 12.04 ESM:
  python2.7                       2.7.3-0ubuntu3.19
  python2.7-minimal               2.7.3-0ubuntu3.19

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