USN-4333-1: Python vulnerabilities

USN-4333-1: Python vulnerabilities

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

• CVE-2019-18348
• CVE-2020-8492

Source: USN-4333-1: Python vulnerabilities