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Category:   OS (UNIX)  >   Apple macOS/OS X Vendors:   Apple
Mac OS X Input Validation Flaw in parse_machfile() Lets Local Users Deny Service
SecurityTracker Alert ID:  1012941
SecurityTracker URL:  http://securitytracker.com/id/1012941
CVE Reference:   CVE-2005-0122   (Links to External Site)
Updated:  Jan 20 2005
Original Entry Date:  Jan 19 2005
Impact:   Denial of service via local system
Exploit Included:  Yes  
Version(s): 10.3.7 and prior versions
Description:   An input validation vulnerability was reported in Mac OS X in the mach kernel loader. A local user can cause the kernel to crash.

nemo from felinemenace.org reported that the parse_machfile() function in 'bsd/kern/mach_loader.c' does not properly validate user-supplied values for the ncmds and offset parameters. A local user can supply a negative value to cause the kernel to crash.

The vendor has been notified.

The original advisory, including a demonstration exploit is available at:

http://felinemenace.org/advisories/macosx.txt

Impact:   A local user can cause denial of service conditions.

A local user may be able to obtain elevated privileges [however, that was not confirmed in the report].

Solution:   No solution was available at the time of this entry.
Vendor URL:  www.apple.com/ (Links to External Site)
Cause:   Boundary error, Input validation error

Message History:   None.


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