USN-1984-1: Python 3.2 vulnerabilities

Releases

• Ubuntu 12.10
• Ubuntu 12.04

Packages

• python3.2 - An interactive high-level object-oriented language

Details

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 machine-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 12.10

• python3.2 - 3.2.3-6ubuntu3.4
• python3.2-minimal - 3.2.3-6ubuntu3.4

Ubuntu 12.04

• python3.2 - 3.2.3-0ubuntu3.5
• python3.2-minimal - 3.2.3-0ubuntu3.5

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

References

• CVE-2013-2099
• CVE-2013-4238

Related notices

• USN-1985-1: python3.3-minimal, python3.3
• USN-1983-1: python2.7, python2.7-minimal
• USN-1982-1: python2.6-minimal, python2.6