USN-1338-1: Rsyslog vulnerability

23 January 2012

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 log message.

Software Description

  • rsyslog - Enhanced syslogd


Peter Eisentraut discovered that Rsyslog would not properly perform input validation when configured to use imfile. If an attacker were able to craft messages in a file that Rsyslog monitored, an attacker could cause a denial of service. The imfile module is disabled by default in Ubuntu.

Update instructions

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

Ubuntu 11.04
rsyslog - 4.6.4-2ubuntu4.2

To update your system, please follow these instructions:

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