Ubuntu: USN-4170-1 Critical: linux kernel Privilege Escalation Risk

Several vulnerabilities have been discovered in the Linux kernel that may lead
to a privilege escalation, denial of service or information leak. The Common
Vulnerabilities and Exposures project identifies the following problems:

CVE-2009-4067

Rafael Dominguez Vega of MWR InfoSecurity reported an issue in the auerswald
module, a driver for Auerswald PBX/System Telephone USB devices. Attackers with physical access to a system's USB ports could obtain elevated
privileges using a specially crafted USB device.

CVE-2011-0712

Rafael Dominguez Vega of MWR InfoSecurity reported an issue in the caiaq
module, a USB driver for Native Instruments USB audio devices. Attackers with physical access to a system's USB ports could obtain elevated
privileges using a specially crafted USB device.

CVE-2011-1020

Kees Cook discovered an issue in the /proc filesystem that allows local
users to gain access to sensitive process information after execution of a
setuid binary.

CVE-2...