USN-3817-1: Python vulnerabilities

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

Source: USN-3817-1: Python vulnerabilities

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