A vulnerability has been reported in Mac OS X, which can be exploited by malicious, local users to gain escalated privileges.
The vulnerability is caused due to UserNotificationCenter.app running any InputManager within /Library/InputManagers in a user's home directory with privileges of the "wheel" group. This can be exploited to perform certain actions with "wheel" privileges (e.g. replacing "/Applications/System Preferences.app/Contents/Resources/installAssistant").
NOTE: If diskutil is invoked by an administrator to repair permissions of a volume, the setuid bit is set on "installAssistant", which is owned by the user root.
The vulnerability is reported in Mac OS X 10.4.8 (x86). Other versions may also be affected.
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Subject: Apple Mac OS X "UserNotificationCenter" Privilege Escalation
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