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USN-2315-1: serf vulnerability

14 August 2014

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



  • serf - high-performance asynchronous HTTP client library


Ben Reser discovered that serf did not correctly handle SSL certificates
with NUL bytes in the CommonName or SubjectAltNames fields. A remote
attacker could exploit this to perform a machine-in-the-middle attack to view
sensitive information or alter encrypted communications.

Update instructions

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

Ubuntu 14.04
Ubuntu 12.04

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