J-Security Center

Title: Apple Mac OS X Shared_Region_Make_Private_Np Kernel Function Local Memory Corruption Vulnerability

Severity: HIGH

Description:

Apple Mac OS X is prone to a local memory-corruption vulnerability. This issue occurs when the operating system fails to handle specially crafted arguments to a system call.

Specifically, the vulnerability resides in the 'uap->rangeCount' and 'uap->ranges' parameters of the 'shared_region_make_private_np()' kernel function. An attacker may exploit this vulnerability by issuing a system call with malicious parameters to the affected function. This results in kernel memory becoming corrupted with attacker-supplied data.

Attackers may exploit this issue to cause a kernel panic, effectively denying further service to legitimate users. Due to the nature of this issue, successful exploits may potentially result in the execution of arbitrary machine code in the context of the affected kernel, but this has not been confirmed.

Mac OS X version 10.4.8 is vulnerable to this issue; other versions may also be affected.

Affected Products:

  • Apple Mac OS X 10.4.0
  • Apple Mac OS X 10.4.1
  • Apple Mac OS X 10.4.2
  • Apple Mac OS X 10.4.3
  • Apple Mac OS X 10.4.4
  • Apple Mac OS X 10.4.5
  • Apple Mac OS X 10.4.6
  • Apple Mac OS X 10.4.7
  • Apple Mac OS X 10.4.8
  • Apple Mac OS X Server 10.4.0
  • Apple Mac OS X Server 10.4.1
  • Apple Mac OS X Server 10.4.2
  • Apple Mac OS X Server 10.4.3
  • Apple Mac OS X Server 10.4.4
  • Apple Mac OS X Server 10.4.5
  • Apple Mac OS X Server 10.4.6
  • Apple Mac OS X Server 10.4.7
  • Apple Mac OS X Server 10.4.8

References:

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