======================================================================
Secunia Research 23/02/2007
- Internet Explorer 7 "onunload" Event Spoofing Vulnerability -
======================================================================
Table of Contents
Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10
======================================================================
1) Affected Software
The vulnerability is confirmed in Microsoft Internet Explorer 7.
======================================================================
2) Severity
Rating: Less critical
Impact: Spoofing
Where: Remote
======================================================================
3) Vendor's Description of Software
Internet Explorer 7 provides improved navigation through tabbed
browsing, web search right from the toolbar, advanced printing, easy
discovery, reading and subscription to RSS feeds, and much more.
http://www.microsoft.com/windows/products/winfamily/ie/default.mspx
======================================================================
4) Description of Vulnerability
Secunia Research has discovered a vulnerability in Internet Explorer
7, which can be exploited by a malicious website to spoof the address
bar.
The vulnerability is caused due to an error in Internet Explorer 7's
handling of "onunload" events, enabling a malicious website to abort
the loading of a new website. This can be exploited to spoof the
address bar if e.g. the user enters a new website manually in the
address bar, which is commonly exercised as best practice.
The vulnerability is confirmed on a fully patched Windows XP SP2
system running Internet Explorer 7. Other versions may also be
affected.
======================================================================
5) Solution
Close all browser windows after visiting untrusted websites.
======================================================================
6) Time Table
05/01/2007 - Vendor notified and responded.
16/02/2007 - Further communication with vendor.
23/02/2007 - Public disclosure due to dislosure by third party.
======================================================================
7) Credits
Discovered by Jakob Balle, Secunia Research.
======================================================================
8) References
No references available.
======================================================================
9) About Secunia
Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:
http://corporate.secunia.com/
Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private
individuals, who are interested in or concerned about IT-security.
http://secunia.com/
Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the
security and reliability of software in general:
http://corporate.secunia.com/secunia_research/33/
Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:
http://secunia.com/secunia_vacancies/
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
======================================================================
10) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-1/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
======================================================================