CWE
93
Advisory Published

USN-4581-1: Python vulnerability

First published: Wed Oct 14 2020(Updated: )

It was discovered that Python incorrectly handled certain character sequences. A remote attacker could possibly use this issue to perform CRLF injection.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/python2.7<2.7.17-1~18.04ubuntu1.2
2.7.17-1~18.04ubuntu1.2
Ubuntu Ubuntu=18.04
All of
ubuntu/python2.7-minimal<2.7.17-1~18.04ubuntu1.2
2.7.17-1~18.04ubuntu1.2
Ubuntu Ubuntu=18.04
All of
ubuntu/python3.6<3.6.9-1~18.04ubuntu1.3
3.6.9-1~18.04ubuntu1.3
Ubuntu Ubuntu=18.04
All of
ubuntu/python3.6-minimal<3.6.9-1~18.04ubuntu1.3
3.6.9-1~18.04ubuntu1.3
Ubuntu Ubuntu=18.04
All of
ubuntu/python2.7<2.7.12-1ubuntu0~16.04.13
2.7.12-1ubuntu0~16.04.13
Ubuntu Ubuntu=16.04
All of
ubuntu/python2.7-minimal<2.7.12-1ubuntu0~16.04.13
2.7.12-1ubuntu0~16.04.13
Ubuntu Ubuntu=16.04
All of
ubuntu/python3.5<3.5.2-2ubuntu0~16.04.12
3.5.2-2ubuntu0~16.04.12
Ubuntu Ubuntu=16.04
All of
ubuntu/python3.5-minimal<3.5.2-2ubuntu0~16.04.12
3.5.2-2ubuntu0~16.04.12
Ubuntu Ubuntu=16.04
All of
ubuntu/python2.7<2.7.6-8ubuntu0.6+esm7
2.7.6-8ubuntu0.6+esm7
Ubuntu Ubuntu=14.04
All of
ubuntu/python2.7-minimal<2.7.6-8ubuntu0.6+esm7
2.7.6-8ubuntu0.6+esm7
Ubuntu Ubuntu=14.04
All of
ubuntu/python3.4<3.4.3-1ubuntu1~14.04.7+esm8
3.4.3-1ubuntu1~14.04.7+esm8
Ubuntu Ubuntu=14.04
All of
ubuntu/python3.4-minimal<3.4.3-1ubuntu1~14.04.7+esm8
3.4.3-1ubuntu1~14.04.7+esm8
Ubuntu Ubuntu=14.04
All of
ubuntu/python2.7<2.7.3-0ubuntu3.19
2.7.3-0ubuntu3.19
Ubuntu Ubuntu=12.04
All of
ubuntu/python2.7-minimal<2.7.3-0ubuntu3.19
2.7.3-0ubuntu3.19
Ubuntu Ubuntu=12.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID of this Python vulnerability?

    The vulnerability ID of this Python vulnerability is USN-4581-1.

  • What is the impact of this vulnerability?

    This vulnerability allows a remote attacker to perform CRLF injection.

  • Which versions of Python are affected by this vulnerability?

    The affected versions of Python are 2.7.17-1~18.04ubuntu1.2, 3.6.9-1~18.04ubuntu1.3, 2.7.12-1ubuntu0~16.04.13, 3.5.2-2ubuntu0~16.04.12, 2.7.6-8ubuntu0.6+esm7, 3.4.3-1ubuntu1~14.04.7+esm8, and 2.7.3-0ubuntu3.19.

  • How can I fix this Python vulnerability?

    To fix this vulnerability, update Python to version 2.7.17-1~18.04ubuntu1.2, 3.6.9-1~18.04ubuntu1.3, 2.7.12-1ubuntu0~16.04.13, 3.5.2-2ubuntu0~16.04.12, 2.7.6-8ubuntu0.6+esm7, 3.4.3-1ubuntu1~14.04.7+esm8, or 2.7.3-0ubuntu3.19.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability at the following references: [USN-4754-3](https://ubuntu.com/security/notices/USN-4754-3) and [CVE-2020-26116](https://ubuntu.com/security/CVE-2020-26116).

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