Vulnerability Note VU#882619

Rockwell Automation ControlLogix 1756-ENBT/A EtherNet/IP Bridge cross-site scripting vulnerability

Overview

The Rockwell ControlLogix 1756-ENBT/A EtherNet/IP Bridge web interface contains a cross-site scripting vulnerability that may allow an attacker to spoof data or redirect end user's to other sites.

I. Description

The Rockwell Logix Automation ControlLogix 1756-ENBT/A EtherNet/IP Bridge uses a web interface to display log files and status information. This web interface contains multiple cross-site scripting vulnerabilities. To exploit these issues, an attacker would need to convince an operator to open on a specially crafted URL.

II. Impact

An attacker may be able to execute arbitrary javascript in an operator's browser. This script could be used to spoof data or redirect an operator's web browser to other sites.

III. Solution

See Rockwell's vendor statement for information about obtaining fixed software. Until updated firmware is available, the below workarounds will mitigate this vulnerability.

Do not allow remote access

If no Internet connectivity is allowed (including access through email, proxies or firewalls) to the operator's computer, an attacker will not be able to remotely exploit this issue. See Rockwell's Reference Architectures for Manufacturing site for more information about secure network configurations.

Systems Affected

Vendor	Status	Date Updated
Rockwell Automation	Vulnerable		2009-02-05

References

http://www.ab.com/networks/architectures.html
http://en.wikipedia.org/w/index.php?title=Cross-site_scripting&oldid=268497783

Credit

Thanks to Daniel Peck of Digital Bond, Inc. for reporting this issue.

This document was written by Ryan Giobbi.

Other Information

Date Public	02/01/2009
Date First Published	02/05/2009 08:26:01 AM
Date Last Updated	02/05/2009
CERT Advisory
CVE Name
Metric	0.05
Document Revision	56

If you have feedback, comments, or additional information about this vulnerability, please send us email.