USN-5083-1: Python vulnerabilities

Publication date

16 September 2021

Overview

Several security issues were fixed in Python.


Packages

  • python3.4 - An interactive high-level object-oriented language
  • python3.5 - An interactive high-level object-oriented language

Details

It was discovered that Python incorrectly handled certain RFCs.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 16.04 ESM. (CVE-2021-3733)

It was discovered that Python incorrectly handled certain
server responses. An attacker could possibly use this issue to
cause a denial of service. (CVE-2021-3737)

It was discovered that Python incorrectly handled certain RFCs.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 16.04 ESM. (CVE-2021-3733)

It was discovered that Python incorrectly handled certain
server responses. An attacker could possibly use this issue to
cause a denial of service. (CVE-2021-3737)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.04 xenial python3.5 –  3.5.2-2ubuntu0~16.04.13+esm1  
python3.5-minimal –  3.5.2-2ubuntu0~16.04.13+esm1  
14.04 trusty python3.4 –  3.4.3-1ubuntu1~14.04.7+esm11  
python3.4-minimal –  3.4.3-1ubuntu1~14.04.7+esm11  

Reduce your security exposure

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