OSSN/OSSN-0079

Summary
Older versions of libvirt included network storage authentication information on the qemu command line. If libvirt raises an exception which logs the qemu command line it used, for example an error starting a domain, this authentication information will available in the logs.

Affected Services / Software
Versions 2.5 and earlier of QEMU and libvirt versions of 2.1 or earlier.

The issue has been resolved in all QEMU versions 2.6 and above and libvirt 2.2 and above.

No patches or specific releases of Nova or Ceph are required, the issue is completely resolved in QEMU and libvirt.

Discussion
If a deployment is using ceph, a libvirt error starting a domain would log the cephx secret key and the monitor addresses on the qemu command line.

A local attacker could then use this flaw to gain access of the cephx secret key and perform certain privileged operations within the cluster.

An existing CVE is already present for this issue.

Recommended Actions
The issue has been resolved upstream. Users running qemu version 2.6 or later, and libvirt version 2.2 or later, are not vulnerable.

No change is required in Nova or Ceph to resolve this issue.

Contacts / References
Author: Luke Hinds, Red Hat

https://access.redhat.com/security/cve/CVE-2015-5160

This OSSN : https://wiki.openstack.org/wiki/OSSN/OSSN-0079

Original LaunchPad Bug : https://bugs.launchpad.net/ossn/+bug/1686743

OpenStack Security Project : https://launchpad.net/~openstack-ossg