CVE-2013-3949 Information

Description

The posix_spawn system call in the XNU kernel in Apple Mac OS X 10.8.x does not prevent use of the _POSIX_SPAWN_DISABLE_ASLR and _POSIX_SPAWN_ALLOW_DATA_EXEC flags for setuid and setgid programs which allows local users to bypass intended access restrictions via a wrapper program that calls the posix_spawnattr_setflags function.

Reference

http://antid0te.com/syscan_2013/SyScan2013_Mountain_Lion_iOS_Vulnerabilities_Garage_Sale_Whitepaper.pdf http://www.syscan.org/index.php/sg/program/day/2