CVE-2009-1238 Information

Description

Race condition in the HFS vfs sysctl interface in XNU 1228.8.20 and earlier on Apple Mac OS X 10.5.6 and earlier allows local users to cause a denial of service (kernel memory corruption) by simultaneously executing the same HFS_SET_PKG_EXTENSIONS code path in multiple threads which is problematic because of lack of mutex locking for an unspecified global variable.

Reference

http://secunia.com/advisories/34424 http://www.digit-labs.org/files/exploits/xnu-vfssysctl-dos.c http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181 http://www.securityfocus.com/bid/34202 https://www.exploit-db.com/exploits/8265