=========================================================================Ubuntu Security Notice USN-5519-1
July 14, 2022

python2.7, python3.10, python3.4, python3.5, python3.6, python3.8,
python3.9 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Python could be made to run arbitrary code if it received a specially
crafted input.

Software Description:
- python2.7: An interactive high-level object-oriented language
- python3.10: Interactive high-level object-oriented language (version 3.10)
- python3.9: Interactive high-level object-oriented language (version 3.9)
- python3.8: 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 inputs.
An attacker could possibly use this issue to execute arbitrary code.

Update instructions:

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

Ubuntu 22.04 LTS:
  python2.7                       2.7.18-13ubuntu1.1
  python2.7-minimal               2.7.18-13ubuntu1.1
  python3.10                      3.10.4-3ubuntu0.1
  python3.10-minimal              3.10.4-3ubuntu0.1

Ubuntu 21.10:
  python2.7                       2.7.18-8ubuntu0.2
  python2.7-minimal               2.7.18-8ubuntu0.2
  python3.9                       3.9.7-2ubuntu0.1
  python3.9-minimal               3.9.7-2ubuntu0.1

Ubuntu 20.04 LTS:
  python2.7                       2.7.18-1~20.04.3
  python2.7-minimal               2.7.18-1~20.04.3
  python3.8                       3.8.10-0ubuntu1~20.04.5
  python3.8-minimal               3.8.10-0ubuntu1~20.04.5

Ubuntu 18.04 LTS:
  python2.7                       2.7.17-1~18.04ubuntu1.8
  python2.7-minimal               2.7.17-1~18.04ubuntu1.8
  python3.6                       3.6.9-1~18.04ubuntu1.8
  python3.6-minimal               3.6.9-1~18.04ubuntu1.8

Ubuntu 16.04 ESM:
  python2.7                       2.7.12-1ubuntu0~16.04.18+esm2
  python2.7-minimal               2.7.12-1ubuntu0~16.04.18+esm2
  python3.5                       3.5.2-2ubuntu0~16.04.13+esm3
  python3.5-minimal               3.5.2-2ubuntu0~16.04.13+esm3

Ubuntu 14.04 ESM:
  python2.7                       2.7.6-8ubuntu0.6+esm11
  python2.7-minimal               2.7.6-8ubuntu0.6+esm11
  python3.4                       3.4.3-1ubuntu1~14.04.7+esm13
  python3.4-minimal               3.4.3-1ubuntu1~14.04.7+esm13

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

References:
  https://ubuntu.com/security/notices/USN-5519-1
  CVE-2015-20107

Package Information:
  https://launchpad.net/ubuntu/+source/python2.7/2.7.18-13ubuntu1.1
  https://launchpad.net/ubuntu/+source/python3.10/3.10.4-3ubuntu0.1
  https://launchpad.net/ubuntu/+source/python2.7/2.7.18-8ubuntu0.2
  https://launchpad.net/ubuntu/+source/python3.9/3.9.7-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/python2.7/2.7.18-1~20.04.3
  https://launchpad.net/ubuntu/+source/python3.8/3.8.10-0ubuntu1~20.04.5
  https://launchpad.net/ubuntu/+source/python2.7/2.7.17-1~18.04ubuntu1.8
  https://launchpad.net/ubuntu/+source/python3.6/3.6.9-1~18.04ubuntu1.8