1. Ubuntu Security Notices
  2. USN-1965-1

USN-1965-1: pyOpenSSL vulnerability

Publication date

23 September 2013

Overview

Fraudulent security certificates could allow sensitive information to be exposed when accessing the Internet.

Releases

Packages

  • pyopenssl - Python wrapper around the OpenSSL library

Details

It was discovered that pyOpenSSL 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.

It was discovered that pyOpenSSL 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.

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 python-openssl –  0.13-2ubuntu3.1
python3-openssl –  0.13-2ubuntu3.1
12.10 quantal python-openssl –  0.13-2ubuntu1.1
python3-openssl –  0.13-2ubuntu1.1
12.04 precise python-openssl –  0.12-1ubuntu2.1
10.04 lucid python-openssl –  0.10-1ubuntu0.1

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References

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