Title: Apple Mac OS X Kernel Workqueue Local Privilege Escalation Vulnerability
Severity: HIGH
Description:
Apple Mac OS X is prone to a local privilege-escalation vulnerability affecting the kernel.
This problem stems from an index error in the handling of kernel workqueues and affects the 'workqueue_additem()' and 'workqueue_removeitem()' functions of the 'bsd/kern/pthread_synch.c' file. A local attacker may exploit this issue to set the effective userid of attacker-controlled processes to root or the attacker may modify kernel code in memory.
The attacker can gain kernel-level privileges, which may lead to a complete compromise of the affected computer.
NOTE: This issue was previously covered in BID 34926 (Apple Mac OS X 2009-002 Multiple Security Vulnerabilities), but has been assigned its own record to better document it.
Affected Products:
- Apple Mac OS X 10.5
- Apple Mac OS X 10.5.1
- Apple Mac OS X 10.5.2
- Apple Mac OS X 10.5.3
- Apple Mac OS X 10.5.4
- Apple Mac OS X 10.5.5
- Apple Mac OS X 10.5.6
- Apple Mac OS X Server 10.5
- Apple Mac OS X Server 10.5.1
- Apple Mac OS X Server 10.5.2
- Apple Mac OS X Server 10.5.3
- Apple Mac OS X Server 10.5.4
- Apple Mac OS X Server 10.5.5
- Apple Mac OS X Server 10.5.6
References:
- Apple: Mac OS X Home Page
- CVE: CVE-2008-1517
- iDefense Labs: Apple Mac OS X xnu Kernel workqueue_additem/workqueue_removeitem Index Validatio
- xorl: CVE-2008-1517: Apple Mac OS X (XNU) Missing Array Index Validation
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