1. Ubuntu Security Notices
  2. USN-282-1

USN-282-1: Nagios vulnerability

Publication date

8 May 2006

Overview

Nagios vulnerability

Releases

Details

The nagios CGI scripts did not sufficiently check the validity of the
HTTP Content-Length attribute. By sending a specially crafted HTTP
request with a negative Content-Length value to the Nagios server, a
remote attacker could exploit this to execute arbitrary code with web
server privileges.

Please note that the Apache 2 web server already checks for valid
Content-Length values, so installations using Apache 2 (the only web
server officially supported in Ubuntu) are not vulnerable to this
flaw.

The nagios CGI scripts did not sufficiently check the validity of the
HTTP Content-Length attribute. By sending a specially crafted HTTP
request with a negative Content-Length value to the Nagios server, a
remote attacker could exploit this to execute arbitrary code with web
server privileges.

Please note that the Apache 2 web server already checks for valid
Content-Length values, so installations using Apache 2 (the only web
server officially supported in Ubuntu) are not vulnerable to this
flaw.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
5.10 breezy nagios-common – 
5.04 hoary nagios-common – 

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References

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