Description
The cs_validate_page function in bsd/kern/ubc_subr.c in the xnu kernel 1228.0 and earlier in Apple Mac OS X 10.5.1 allows local users to cause a denial of service (failed assertion and system crash) via a crafted signed Mach-O binary that causes the hashes function to return NULL.
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 1228.0 - 'super_blob' Local kernel Denial of Service (PoC) EDB-4723 · dos · Dec 12, 2007 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 26840 vdb-entry
- macosx-csvalidatepage-dos(38997) vdb-entry
- TA08-150A third-party-advisory
- 30430 third-party-advisory
- APPLE-SA-2008-05-28 vendor-advisory
- ADV-2007-4216 vdb-entry
- http://digit-labs.org/files/exploits/xnu-superblob-dos.c
- ADV-2008-1697 vdb-entry
- 28048 third-party-advisory