TITLE:
Firefox Exception Handling Full Path Disclosure Weakness

SECUNIA ADVISORY ID:
SA20244

VERIFY ADVISORY:
http://secunia.com/advisories/20244/

CRITICAL:
Not critical

IMPACT:
Exposure of system information

WHERE:
>From remote

SOFTWARE:
Mozilla Firefox 1.x
http://secunia.com/product/4227/
Mozilla Firefox 0.x
http://secunia.com/product/3256/

DESCRIPTION:
A weakness has been discovered in Firefox, which can be exploited by
malicious people to disclose system information.

The weakness is caused due to file path information being included in
certain exceptions being thrown by the browser. This can e.g. be
exploited to disclose the full installation path by calling the
"window.sidebar.addSearchEngine()" JavaScript function with invalid
parameters.

This may reportedly also be exploited to disclose the full path to
the user's profile via errors thrown in installed extensions.

The weakness has been confirmed in version 1.5.0.3. Other versions
may also be affected.

SOLUTION:
Disable JavaScript support.

PROVIDED AND/OR DISCOVERED BY:
Originally discovered by Martin Hassman and reported to public
mailing lists by milw0rm.

ORIGINAL ADVISORY:
https://bugzilla.mozilla.org/show_bug.cgi?id=267645

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