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Insecure Library Loading
Not critical

Apple Safari WebKit "servePendingRequests()" Use-After-Free Weakness

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Release Date:  2009-07-03    Last Update:  2009-07-13    Views:  5,548

Secunia Advisory SA33495

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Workaround

Software:

CVE Reference(s):

Description


A weakness has been discovered in Apple Safari, which can be exploited by malicious people to cause a DoS (Denial of Service).

The weakness is caused due to a use-after-free error while calling the "servePendingRequests()" function in WebKit. This can be exploited to dereference invalid memory and cause a crash when a user visits a specially crafted web page.

Successful exploitation crashes the browser. However, even though code execution has not been proven, it cannot be completely ruled out.

NOTE: Secunia normally does not classify a browser crash as a vulnerability nor issue an advisory about it. However, the potential impact of this issue may be more severe than currently believed.

The weakness is confirmed in Apple Safari version 4.0 (530.17) for Windows. Other versions may also be affected.


Solution:
Fixed in the WebKit development repository.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Marcell 'SkyOut' Dietl and Achim Hoffmann

Original Advisory:
http://marcell-dietl.de/index/adv_safari_4_x_js_reload_dos.php

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: Apple Safari WebKit "servePendingRequests()" Use-After-Free Weakness

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