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TITLE:
Internet Explorer "document.open()" Method Spoofing Vulnerability

SECUNIA ADVISORY ID:
SA26069

VERIFY ADVISORY:
http://secunia.com/advisories/26069/

CRITICAL:
Less critical

IMPACT:
Spoofing

WHERE:
>From remote

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

DESCRIPTION:
Michal Zalewski has discovered a vulnerability in Internet Explorer,
which can be exploited by a malicious website to spoof the address
bar.

The vulnerability is caused due to an error in the handling of the
"document.open()" method and 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:
Michal Zalewski

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2007-July/064636.html

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