USN-1117-1: PolicyKit vulnerability

Ubuntu Security Notice USN-1117-1

19th April, 2011

policykit-1 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 9.10

Summary

Local users could gain root access by using the pkexec tool in PolicyKit.

Software description

  • policykit-1 - framework for managing administrative policies and privileges

Details

Neel Mehta discovered that PolicyKit did not correctly verify the user
making authorization requests. A local attacker could exploit this to
trick pkexec into running applications with root privileges.

Update instructions

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

Ubuntu 10.10:
libpolkit-backend-1-0 0.96-2ubuntu1.1
Ubuntu 10.04 LTS:
libpolkit-backend-1-0 0.96-2ubuntu0.1
Ubuntu 9.10:
libpolkit-backend-1-0 0.94-1ubuntu1.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2011-1485