CVE-2013-3954 Information

Description

The posix_spawn system call in the XNU kernel in Apple Mac OS X 10.8.x does not properly validate the data for file actions and port actions which allows local users to (1) cause a denial of service (panic) via a size value that is inconsistent with a header count field or (2) obtain sensitive information from kernel heap memory via a certain size value in conjunction with a crafted buffer.

Reference

http://antid0te.com/syscan_2013/SyScan2013_Mountain_Lion_iOS_Vulnerabilities_Garage_Sale_Whitepaper.pdf http://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html http://lists.apple.com/archives/security-announce/2013/Sep/msg00006.html http://secunia.com/advisories/54886 http://support.apple.com/kb/HT5934 http://www.securitytracker.com/id/1029054 http://www.syscan.org/index.php/sg/program/day/2