OSI Security: LANSA aXes Web Terminal (TN5250) Cross-Site Scripting Vulnerability

LANSA aXes Web Terminal (TN5250) Cross-Site Scripting Vulnerability
http://www.osisecurity.com.au/advisories/lansa-axes-web-terminal-tn5250-cross-site-scripting

Release Date:
30-Apr-2011

Software:
LANSA - aXes
http://www.lansa.com
http://www.axeslive.com

"Transform your 5250 applications into GUI browser-based applications
automatically – without changing any lines of your source code. Work with
IBM i, System i, iSeries and AS/400 5250 applications securely and efficiently
from browser-based devices running across the Internet, inside your corporate
Intranet or on a mobile network."

Versions tested:
Version V1R3M5 / VRM130.000 (135001) has been confirmed as
vulnerable. Other versions untested.

Vulnerability discovered:
Cross-site Scripting

Vulnerability impact:
Low - Remote content may contain JavaScript which is client executed.
May be used to steal authentication information.

Vulnerability information:
The remote page may contain JavaScript for XSS purposes, e.g. cookies.

Example:

https://[target]/axests/terminal?cssref=/ts/skins/axes_default.css?axbuild=135001&login="><script>alert("XSS");</script>

Recommendation:

Vendor did not respond.

Workaround:

Disable JavaScript, use a WAF / IDS etc.

Credit:
This vulnerability was discovered by Patrick Webster.

Disclosure timeline:
18-Sep-2010 - Discovered during audit.
23-Sep-2010 - Notified vendor. Received automated support ticket.
30-Apr-2011 - Disclosure.

About OSI Security:

OSI Security is an independent network and computer security auditing
and consulting company based in Sydney, Australia. We provide internal
and external penetration testing, vulnerability auditing and wireless
site audits, vendor product assessments, secure network design,
forensics and risk mitigation services.

We can be found at http://www.osisecurity.com.au/