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TITLE:
Mozilla Firefox JavaScript Engine Information Disclosure
Vulnerability

SECUNIA ADVISORY ID:
SA14820

VERIFY ADVISORY:
http://secunia.com/advisories/14820/

CRITICAL:
Moderately critical

IMPACT:
Exposure of system information, Exposure of sensitive information

WHERE:
>From remote

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

DESCRIPTION:
A vulnerability has been discovered in Mozilla Firefox, which can be
exploited by malicious people to gain knowledge of potentially
sensitive information.

The vulnerability is caused due to an error in the JavaScript engine,
as a "lambda" replace exposes arbitrary amounts of heap memory after
the end of a JavaScript string.

Successful exploitation may disclose sensitive information in
memory.

Secunia has constructed a test, which can be used to check if your
browser is affected by this issue:
http://secunia.com/mozilla_products_arbitrary_memory_exposure_test/

The vulnerability has been confirmed in versions 1.0.1 and 1.0.2.
Other versions may also be affected.

SOLUTION:
Disable JavaScript support.

PROVIDED AND/OR DISCOVERED BY:
Azafran

ORIGINAL ADVISORY:
Mozilla bug report:
https://bugzilla.mozilla.org/show_bug.cgi?id=288688

Azafran:
http://cubic.xfo.org.ru/index.cgi?read=53004

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


Please Note:
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Secunia NEVER sends attached files with advisories.
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