USN-1224-1: rsyslog vulnerability

3 October 2011

rsyslog vulnerability

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

  • Ubuntu 11.04


Rsyslog could be made to crash if it processed a specially crafted message.

Software Description

  • rsyslog - enhanced multi-threaded syslogd


It was discovered that rsyslog had an off-by-two error when parsing legacy syslog messages. An attacker could potentially exploit this to cause a denial of service via application crash.

Update instructions

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

Ubuntu 11.04
rsyslog - 4.6.4-2ubuntu4.1

To update your system, please follow these instructions:

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