INFIGO IS Security Advisory #INFIGO-2008-02-13

==[ Overview

Sophos ES1000 Email Security Appliance delivers protection against spam, viruses,
Trojans, spyware and other malware. Sophos's award-winning anti-virus engine detects
all types of malware in a single, high-speed scan. Every Sophos appliance is updated
with new protection intelligence every 5 minutes.

==[ Vulnerability

During an audit of Sophos ES1000 Email Security Appliance, a Cross Site Scripting
vulnerability was discovered in its web administration interface.
Administration web interface is available on the public network interface, over HTTPS
on port 18080.

Lack of input validation for 'error' and 'go' parameters of the 'Login'
script, allows malicious JavaScript code injection.

https://192.168.0.10:18080/Login?logout=0&error=<INJECTION>&go=<INJECTION>

This can be exploited by a malicious user to steal Sophos ES1000 Email Security
Appliance administrator credentials, and shut down the appliance, or change its
configuration. 

==[ Affected Version

The vulnerability has been identified in the latest available Sophos ES1000 and
ES4000 Email Security appliances.

==[ Fix

This vulnerability has been fixed in Sophos Email Appliance version 2.1.1.0
and above, available automatically to Sophos' customers between 14-21
February 2008. More information at
http://www.sophos.com/support/knowledgebase/article/34733.html

==[ PoC Exploit

Not needed.

==[ Vendor status

28.01.2008 - Initial contact, automated response
04.02.2008 - Repeated contact
06.02.2008 - Vendor response
07.02.2008 - Vendor status update
08.02.2008 - Vendor status update
13.02.2008 - Vendor status update
14.02.2008 - fix available
15.02.2008 - Coordinated public disclosure

==[ Credits

Vulnerability discovered by Leon Juranic <leon.juranic@infigo.hr>

==[ Contact

INFIGO IS

Web: http://www.infigo.hr
E-mail: infocus@infigo.hr