USN-2381-1: Rsyslog vulnerabilities

9 October 2014

rsyslog vulnerabilities

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


Rsyslog could be made to crash if it received specially crafted input.

Software Description

  • rsyslog - Enhanced syslogd


It was discovered that Rsyslog incorrectly handled invalid PRI values. An attacker could use this issue to send malformed messages to the Rsyslog server and cause it to stop responding, resulting in a denial of service and possibly message loss. (CVE-2014-3634, CVE-2014-3683)

Update instructions

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

Ubuntu 14.04 LTS
rsyslog - 7.4.4-1ubuntu2.3
Ubuntu 12.04 LTS
rsyslog - 5.8.6-1ubuntu8.9
Ubuntu 10.04 LTS
rsyslog - 4.2.0-2ubuntu8.3

To update your system, please follow these instructions:

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