USN-4333-1: Python vulnerabilities

21 April 2020

python2.7, python3.4, python3.5, python3.6, python3.7 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 19.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 ESM
  • Ubuntu 12.04 ESM

Summary

Several security issues were fixed in Python.

Software Description

  • python3.7 - An interactive high-level object-oriented language
  • 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 stripped certain characters from requests. A remote attacker could use this issue to perform CRLF injection. (CVE-2019-18348)

It was discovered that Python incorrectly handled certain HTTP requests. An attacker could possibly use this issue to cause a denial of service. (CVE-2020-8492)

Update instructions

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

Ubuntu 19.10
python3.7 - 3.7.5-2~19.10ubuntu1
python3.7-minimal - 3.7.5-2~19.10ubuntu1
Ubuntu 18.04 LTS
python2.7 - 2.7.17-1~18.04ubuntu1
python2.7-minimal - 2.7.17-1~18.04ubuntu1
python3.6 - 3.6.9-1~18.04ubuntu1
python3.6-minimal - 3.6.9-1~18.04ubuntu1
Ubuntu 16.04 LTS
python2.7 - 2.7.12-1ubuntu0~16.04.11
python2.7-minimal - 2.7.12-1ubuntu0~16.04.11
python3.5 - 3.5.2-2ubuntu0~16.04.10
python3.5-minimal - 3.5.2-2ubuntu0~16.04.10
Ubuntu 14.04 ESM
python2.7 - 2.7.6-8ubuntu0.6+esm5
python2.7-minimal - 2.7.6-8ubuntu0.6+esm5
python3.4 - 3.4.3-1ubuntu1~14.04.7+esm6
python3.4-minimal - 3.4.3-1ubuntu1~14.04.7+esm6
Ubuntu 12.04 ESM
python2.7 - 2.7.3-0ubuntu3.17
python2.7-minimal - 2.7.3-0ubuntu3.17

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References