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Moderately critical

Mozilla Firefox JavaScript Engine Information Disclosure Vulnerability

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Release Date:  2005-04-04    Last Update:  2005-04-16    Views:  176,281

Secunia Advisory SA14820

Where:

From remote

Impact:

Exposure of system information, Exposure of sensitive information

Solution Status:

Vendor Patch

CVE Reference(s):

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:
Update to version 1.0.3.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Azafran

Original Advisory:
The Mozilla Organization:
http://www.mozilla.org/security/announce/mfsa2005-33.html
https://bugzilla.mozilla.org/show_bug.cgi?id=288688

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

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Mozilla Firefox JavaScript Engine Information Disclosure Vulnerability

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