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TITLE:
Mozilla Firefox "locations.hostname" DOM Property Handling
Vulnerability

SECUNIA ADVISORY ID:
SA24175

VERIFY ADVISORY:
http://secunia.com/advisories/24175/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Manipulation of data

WHERE:
>From remote

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

DESCRIPTION:
Michal Zalewski has reported a vulnerability in Mozilla Firefox,
which can be exploited by malicious people to bypass certain security
restrictions.

The vulnerability is caused due to an error in the handling of the
"locations.hostname" DOM property. This can be exploited to e.g.
manipulate authentication cookies for an arbitrary web site via
assigning a URL including a NULL character ("\x00") to
"locations.hostname".

Successful exploitation requires that the user is e.g. tricked into
visiting a malicious web site.

The vulnerability is reported in version 2.0.0.1. Other versions may
also be affected.

NOTE: Other issues have also been reported, some of which are also
related to the "locations.hostname" DOM property.

SOLUTION:
Do not browse untrusted web sites.

PROVIDED AND/OR DISCOVERED BY:
Michal Zalewski

ORIGINAL ADVISORY:
Full-Disclosure:
http://lists.grok.org.uk/pipermail/full-disclosure/2007-February/052447.html

OTHER REFERENCES:
https://bugzilla.mozilla.org/show_bug.cgi?id=370445

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