Date: Wed, 19 Jul 2006 00:02:16 +0200
From: security@...itz-naumann.com
To: Full Disclosure <full-disclosure@...ts.grok.org.uk>,
	bugtraq@...urityfocus.com, moderators@...db.org
Subject: WebScarab <= 20060621-0003 cross site scripting

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SA0012

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++          WebScarab Cross Site Scripting           +++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


PUBLISHED ON
  Jul 18, 2006


PUBLISHED AT
  http://moritz-naumann.com/adv/0012/webscarabxss/0012.txt
  http://moritz-naumann.com/adv/0012/webscarabxss/0012.txt.gpg


PUBLISHED BY
  Moritz Naumann IT Consulting & Services
  Hamburg, Germany
  http://moritz-naumann.com/

  SECURITY at MORITZ hyphon NAUMANN d0t COM
  GPG key: http://moritz-naumann.com/keys/0x277F060C.asc


AFFECTED APPLICATION OR SERVICE
  WebScarab
  http://www.owasp.org/index.php/OWASP_WebScarab_Project
  http://sourceforge.net/projects/owasp/

  WebScarab is a Free Software for manual and semi-automatic
  web application penetration testing. It is developed in
  Java by Rogan Dawes as part of the Open Web Application
  Security Project (OWASP).


AFFECTED VERSIONS
  Version 20060621-0003 and below


ISSUES
  WebScarab is subject to a client side script code injection
  vulnerability which may allows for running cross site
  scripting attacks against web clients connecting through it.

  +++++ 1. Cross Site Scripting vulnerability in error
           messages

  By accessing the following URI using a web browser which is
  prone to this issue and configured to proxy through a
  vulnerable version of WebScarab, a non-persitent web script
  injection can be achieved:

  http://arbitrary.domain/</pre><script>alert(0);</script>

  This allows for disclosure of sensitive data stored in the
  security context of any arbitrary domain which the web browser
  has previously accessed but WebScarab is not able to access
  by the time the attack takes place (due to invalid upstream
  proxy setting on WebScarab, different results of DNS queries,
  limited connectivity or other reasons).

  Ms Internet Explorer 6 SP2 and Konqueror 3.5.3 are known to
  be prone to this issue. This problem is caused by insufficient
  santitation of user supplied input before it is returned to
  the client as part of an error message.


BACKGROUND
  Cross Site Scripting (XSS):
  Cross Site Scripting, also known as XSS or CSS, describes
  the injection of malicious content into output produced
  by a web application. A common attack vector is the
  inclusion of arbitrary client side script code into the
  applications' output. Failure to completely sanitize user
  input from malicious content can cause a web application
  to be vulnerable to Cross Site Scripting.

  http://en.wikipedia.org/wiki/XSS
  http://www.cgisecurity.net/articles/xss-faq.shtml


WORKAROUNDS
  Client: Disable Javascript.
  Server: None known.


SOLUTIONS
  Rogan Dawes has released version 20060718-1904 today.
  This version fixes this issue. The updated packages is
  available at

http://sourceforge.net/project/showfiles.php?group_id=64424&package_id=61823


TIMELINE
  Jul 18, 2006: Discovery, code maintainer notification
  Jul 18, 2006: Code maintainer provides fix
  Jul 18, 2006: Public advisory


REFERENCES
  N/A


ADDITIONAL CREDIT
  N/A


LICENSE
  Creative Commons Attribution-ShareAlike License Germany
  http://creativecommons.org/licenses/by-sa/2.0/de/



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