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Date: 1st December 2006
Risk: High

A new flaw has been found in Mac OS X that may enable local attackers to escalate user privileges or compromise a vulnerable system.

An error in the way that com.apple.AppleDiskImageController handles corrupted DMG image structures causes the vulnerability, which can be exploited to cause a memory corruption and may allow execution of arbitrary code in kernel-mode.

At present, the flaw is unpatched, but there is a workaround - the "opening safe files after downloading" option in preferences should be deactivated and only trusted users should be permitted access to affected systems.

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