Ubuntu: 1963-1: usb-creator vulnerability
Posted by Benjamin D. Thomas   
Ubuntu usb-creator could be tricked into bypassing polkit authorizations.
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Ubuntu Security Notice USN-1963-1
September 18, 2013

usb-creator vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 13.04
- Ubuntu 12.10
- Ubuntu 12.04 LTS

Summary:

usb-creator could be tricked into bypassing polkit authorizations.

Software Description:
- usb-creator: create a startup disk using a CD or disc image

Details:

It was discovered that usb-creator was using polkit in an unsafe manner. A
local attacker could possibly use this issue to bypass intended polkit
authorizations.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 13.04:
  usb-creator-common              0.2.47.1

Ubuntu 12.10:
  usb-creator-common              0.2.40ubuntu2

Ubuntu 12.04 LTS:
  usb-creator-common              0.2.38.2

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1963-1
  CVE-2013-1063

Package Information:
  https://launchpad.net/ubuntu/+source/usb-creator/0.2.47.1
  https://launchpad.net/ubuntu/+source/usb-creator/0.2.40ubuntu2
  https://launchpad.net/ubuntu/+source/usb-creator/0.2.38.2