[USN-1984-1] Python 3.2 vulnerabilities

Marc Deslauriers marc.deslauriers at canonical.com
Tue Oct 1 15:25:26 UTC 2013

Ubuntu Security Notice USN-1984-1
October 01, 2013

python3.2 vulnerabilities

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

- Ubuntu 12.10
- Ubuntu 12.04 LTS


Several security issues were fixed in Python.

Software Description:
- python3.2: 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)

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 LTS:
  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.

  CVE-2013-2099, CVE-2013-4238

Package Information:

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