USN-2315-1: serf vulnerability

Ubuntu Security Notice USN-2315-1

14th August, 2014

serf vulnerability

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


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

Software description

  • 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 man 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 version:

Ubuntu 14.04 LTS:
libserf-1-1 1.3.3-1ubuntu0.1
Ubuntu 12.04 LTS:
libserf1 1.0.0-2ubuntu0.1

To update your system, please follow these instructions:

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