Description
XNU 1228.9.59 and earlier on Apple Mac OS X 10.5.6 and earlier does not properly restrict interaction between user space and the HFS IOCTL handler, which allows local users to overwrite kernel memory and gain privileges by attaching an HFS+ disk image and performing certain steps involving HFS_GET_BOOT_INFO fcntl calls.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Apple Mac OSX xnu 1228.x - 'hfs-fcntl' Kernel Privilege Escalation EDB-8266 · local · Mar 23, 2009 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- http://support.apple.com/kb/HT3757
- ADV-2009-0822 vdb-entry
- 36096 third-party-advisory
- 34424 third-party-advisory
- http://www.digit-labs.org/files/exploits/xnu-hfs-fcntl-v2.c
- APPLE-SA-2009-08-05-1 vendor-advisory
- http://www.digit-labs.org/files/exploits/xnu-hfs-fcntl-v2.sh
- 34203 vdb-entry
- 8266 exploit
- 1022671 vdb-entry
- http://www.informationweek.com/news/hardware/mac/showArticle.jhtml?articleID=216401181
- ADV-2009-2172 vdb-entry
- TA09-218A third-party-advisory