85646 : Apple Mac OS X USB Hub Descriptor bNbrPorts Field Handling Memory Corruption
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Timeline

Disclosure Date
2012-09-19

Description

A memory corruption flaw exists in Apple Mac OS X. This issue is triggered when the program fails to sanitize the bNbrPorts field in the USB hub descriptor resulting in memory corruption. When attaching a USB device, a physically present attacker can cause a denial of service or potentially execute arbitrary code.

Classification

Location: Physical Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Patch / RCS, Upgrade
Exploit: Exploit Private
Disclosure: Vendor Verified, Coordinated Disclosure

Solution

Upgrade to version 10.8.2 or 10.7.5 or higher, as they have been reported to fix this vulnerability. In addition, Apple has released a patch for some older versions.

Products

Apple Inc.	Mac OS X	10.7.4
		10.7.3
		10.7.1
		10.7.2
		10.7

References

Security Tracker: 1027551
CVE ID: 2012-3723 (see also: NVD)
Secunia Advisory ID: 50628
Related OSVDB ID: 85644 85645 85647 85648 85649 85650 85651
Vendor Specific Advisory URL: http://support.apple.com/kb/HT5501

Credit

Andy Davis - NGS Secure Research

CVSSv2 Score

CVSSv2 Base Score = 4.6
Source: nvd.nist.gov | Generated: 2012-09-21 | Disagree?

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