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Secunia is proud to announce the availability of the Secunia Software
Inspector.

The Secunia Software Inspector is a free service that detects insecure
versions of software that you may have installed in your system. When
insecure versions are detected, the Secunia Software Inspector also
provides thorough guidelines for updating the software to the latest
secure version from the vendor.

Try it out online:
http://secunia.com/software_inspector/

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TITLE:
Internet Explorer 7 "onunload" Event Spoofing Vulnerability

SECUNIA ADVISORY ID:
SA23014

VERIFY ADVISORY:
http://secunia.com/advisories/23014/

CRITICAL:
Less critical

IMPACT:
Spoofing

WHERE:
>From remote

SOFTWARE:
Microsoft Internet Explorer 7.x
http://secunia.com/product/12366/

DESCRIPTION:
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.

SOLUTION:
Close all browser windows after visiting untrusted websites.

PROVIDED AND/OR DISCOVERED BY:
Originally discovered by:
* Jakob Balle, Secunia Research

Independently discovered and publicly disclosed by:
* Michal Zalewski

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2007-1/

OTHER REFERENCES:
Michal Zalewski:
http://lists.grok.org.uk/pipermail/full-disclosure/2007-February/052630.html

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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