USN-1985-1: Python 3.3 vulnerabilities

1 October 2013

python3.3 vulnerabilities

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

  • Ubuntu 13.04
  • Ubuntu 12.10


Several security issues were fixed in Python.

Software Description

  • python3.3 - An interactive high-level object-oriented language


Florian Weimer discovered that Python incorrectly handled matching multiple wildcards in ssl certificate hostnames. An attacker could exploit this to cause Python to consume resources, resulting in a denial of service. (CVE-2013-2099)

Ryan Sleevi discovered that Python did not properly handle certificates with NULL characters in the Subject Alternative Name field. An attacker could exploit this to perform a man in the middle attack to view sensitive information or alter encrypted communications. (CVE-2013-4238)

Update instructions

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

Ubuntu 13.04
python3.3 - 3.3.1-1ubuntu5.2
python3.3-minimal - 3.3.1-1ubuntu5.2
Ubuntu 12.10
python3.3 - 3.3.0-1ubuntu0.1
python3.3-minimal - 3.3.0-1ubuntu0.1

To update your system, please follow these instructions:

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