Ubuntu Security Notice USN-1985-1
1st October, 2013
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 13.04
- Ubuntu 12.10
Several security issues were fixed in Python.
- 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.
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)
The problem can be corrected by updating your system to the following package version:
- Ubuntu 13.04:
- python3.3-minimal 3.3.1-1ubuntu5.2
- python3.3 3.3.1-1ubuntu5.2
- Ubuntu 12.10:
- python3.3-minimal 3.3.0-1ubuntu0.1
- python3.3 3.3.0-1ubuntu0.1
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.