The kernel in Apple Mac OS X 10.4 through 10.4.10 does not reset the current Mach Thread Port or Thread Exception Port when executing a setuid program, which allows local users to execute arbitrary code by creating the port before launching the setuid program, then writing to the address space of the setuid process.
CVSS Severity (version 2.0):
Impact Subscore: 10.0
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
**NOTE: Access Complexity scored Low due to insufficient information
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
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US-CERT Vulnerability Note:
20071114 Apple Mac OS X Mach Port Inheritance Privilege Escalation Vulnerability