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TITLE:
Firefox "wyciwyg://" Handler Vulnerability

SECUNIA ADVISORY ID:
SA25990

VERIFY ADVISORY:
http://secunia.com/advisories/25990/

CRITICAL:
Less critical

IMPACT:
Spoofing, Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
Mozilla Firefox 2.0.x
http://secunia.com/product/12434/

DESCRIPTION:
Michal Zalewski has discovered a vulnerability in Mozilla Firefox,
which can be exploited by malicious people to disclose sensitive
information and conduct spoofing attacks.

The vulnerability is caused due to an error in the handling of the
"wyciwyg://" URI handler. This can be exploited to access or spoof
contents from a previously cached web site e.g. via HTTP 302
redirects when a user visits a malicious web page.

The vulnerability is confirmed in version 2.0.0.4. Other versions may
also be affected.

SOLUTION:
Do not browse untrusted web sites.

PROVIDED AND/OR DISCOVERED BY:
Michal Zalewski

ORIGINAL ADVISORY:
http://lcamtuf.coredump.cx/ffcache/

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