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AUSCERT External Security Bulletin Redistribution
ESB-2020.3542
USN-4581-1: Python vulnerability
15 October 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: python
Publisher: Ubuntu
Operating System: Ubuntu
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Provide Misleading Information -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-26116
Original Bulletin:
https://usn.ubuntu.com/4581-1/
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running python check for an updated version of the software for
their operating system.
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USN-4581-1: Python vulnerability
14 October 2020
Python could be used to perform a CRLF injection if it received a specially crafted request.
Releases
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Packages
o python2.7 - An interactive high-level object-oriented language
o python3.4 - An interactive high-level object-oriented language
o python3.5 - An interactive high-level object-oriented language
o python3.6 - 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.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04
o python2.7 - 2.7.17-1~18.04ubuntu1.2
o python2.7-minimal - 2.7.17-1~18.04ubuntu1.2
o python3.6 - 3.6.9-1~18.04ubuntu1.3
o python3.6-minimal - 3.6.9-1~18.04ubuntu1.3
Ubuntu 16.04
o python2.7 - 2.7.12-1ubuntu0~16.04.13
o python2.7-minimal - 2.7.12-1ubuntu0~16.04.13
o python3.5 - 3.5.2-2ubuntu0~16.04.12
o python3.5-minimal - 3.5.2-2ubuntu0~16.04.12
Ubuntu 14.04
o python2.7 - 2.7.6-8ubuntu0.6+esm7
o python2.7-minimal - 2.7.6-8ubuntu0.6+esm7
o python3.4 - 3.4.3-1ubuntu1~14.04.7+esm8
o python3.4-minimal - 3.4.3-1ubuntu1~14.04.7+esm8
Ubuntu 12.04
o python2.7 - 2.7.3-0ubuntu3.19
o python2.7-minimal - 2.7.3-0ubuntu3.19
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-26116
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