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secunia-ie7.txt

secunia-ie7.txt
Posted Feb 24, 2007
Authored by Jakob Balle | Site secunia.com

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.

tags | advisory, spoof
systems | windows
SHA-256 | 092e93a632b4f71f1943c00dcb9e6057e53974a29bc4c51666ffe12ca8e5216b

secunia-ie7.txt

Change Mirror Download
====================================================================== 

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/

======================================================================



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