USN-1985-1: Python 3.3 vulnerabilities

Releases

• Ubuntu 13.04
• Ubuntu 12.10

Packages

• python3.3 - 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 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

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

References

• CVE-2013-2099
• CVE-2013-4238

Related notices

• USN-1984-1
• USN-1983-1
• USN-1982-1