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Credit:
The information has been provided by Neil Kettle.
The original article can be found at: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=797
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Vulnerable Systems:
* Apple Mac OS X version 10.5.2 and earlier
The Mac OS X xnu (Mach) kernel implements workqueues. This allows the kernel to schedule events to take place in a task. An input validation error exists within this implementation, which can lead to execution of arbitrary code in the kernel.
Exploitation of this issue allows an attacker to execute arbitrary code in the security context of the kernel. An attacker would need a local account on a vulnerable system to exploit this issue. Upon successful exploitation, the attacker could elevate privileges by changing the effective user id to root of an attacker controlled process. Alternatively an attacker could also add or alter kernel code in memory that is commonly referred to as a rootkit.
Patch Availability:
Apple Inc. has released a patch which addresses this issue. For more information, consult their advisory at the following URL:
http://support.apple.com/kb/HT3549
CVE Information:
CVE-2008-1517
Disclosure Timeline:
03/19/2008 - Initial Contact
03/31/2009 - Attribution Request
04/01/2009 - Attribution Sent
04/01/2009 - CVE Requested
05/12/2009 - Coordinated Public Disclosure
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