[USN-1177-1] QEMU vulnerability

Jamie Strandboge jamie at canonical.com
Wed Jul 27 16:49:07 UTC 2011


==========================================================================
Ubuntu Security Notice USN-1177-1
July 27, 2011

qemu-kvm vulnerability
==========================================================================

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

- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

QEMU could be made to run with adminstrator group privileges under certain
circumstances.

Software Description:
- qemu-kvm: Machine emulator and virtualizer

Details:

Andrew Griffiths discovered that QEMU did not correctly drop privileges
when using the 'runas' argument. Under certain circumstances a local
attacker could exploit this to escalate privileges.

Update instructions:

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

Ubuntu 11.04:
  qemu-kvm                        0.14.0+noroms-0ubuntu4.4

Ubuntu 10.10:
  qemu-kvm                        0.12.5+noroms-0ubuntu7.10
  qemu-kvm-extras                 0.12.5+noroms-0ubuntu7.10
  qemu-kvm-extras-static          0.12.5+noroms-0ubuntu7.10

Ubuntu 10.04 LTS:
  qemu-kvm                        0.12.3+noroms-0ubuntu9.15
  qemu-kvm-extras                 0.12.3+noroms-0ubuntu9.15
  qemu-kvm-extras-static          0.12.3+noroms-0ubuntu9.15

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1177-1
  CVE-2011-2527

Package Information:
  https://launchpad.net/ubuntu/+source/qemu-kvm/0.14.0+noroms-0ubuntu4.4
  https://launchpad.net/ubuntu/+source/qemu-kvm/0.12.5+noroms-0ubuntu7.10
  https://launchpad.net/ubuntu/+source/qemu-kvm/0.12.3+noroms-0ubuntu9.15


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