USN-3817-1: Python vulnerabilities

13 November 2018

python2.7, python3.4, python3.5 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Python.

Software Description

  • python2.7 - 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 large amounts of data. A remote attacker could use this issue to cause Python to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1000030)

It was discovered that Python incorrectly handled running external commands in the shutil module. A remote attacker could use this issue to cause Python to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-1000802)

It was discovered that Python incorrectly used regular expressions vulnerable to catastrophic backtracking. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2018-1060, CVE-2018-1061)

It was discovered that Python failed to initialize Expat’s hash salt. A remote attacker could possibly use this issue to cause hash collisions, leading to a denial of service. (CVE-2018-14647)

Update instructions

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

Ubuntu 18.04 LTS
python2.7 - 2.7.15~rc1-1ubuntu0.1
python2.7-minimal - 2.7.15~rc1-1ubuntu0.1
Ubuntu 16.04 LTS
python2.7 - 2.7.12-1ubuntu0~16.04.4
python2.7-minimal - 2.7.12-1ubuntu0~16.04.4
python3.5 - 3.5.2-2ubuntu0~16.04.5
python3.5-minimal - 3.5.2-2ubuntu0~16.04.5
Ubuntu 14.04 LTS
python2.7 - 2.7.6-8ubuntu0.5
python2.7-minimal - 2.7.6-8ubuntu0.5
python3.4 - 3.4.3-1ubuntu1~14.04.7
python3.4-minimal - 3.4.3-1ubuntu1~14.04.7

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