1. Ubuntu Security Notices
  2. USN-1985-1

USN-1985-1: Python 3.3 vulnerabilities

Publication date

1 October 2013

Overview

Several security issues were fixed in Python.

Releases

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
13.04 raring python3.3 –  3.3.1-1ubuntu5.2
python3.3-minimal –  3.3.1-1ubuntu5.2
12.10 quantal python3.3 –  3.3.0-1ubuntu0.1
python3.3-minimal –  3.3.0-1ubuntu0.1

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References

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