USN-2315-1: serf vulnerability

14 August 2014

serf vulnerability

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

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

Software Description

  • serf - high-performance asynchronous HTTP client library

Details

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 versions:

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: https://wiki.ubuntu.com/Security/Upgrades.

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

References