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CVE-2013-4399
When a client disconnects from libvirtd, all event callbacks must be removed. This involves running the public API virConnectDomainEventDeregisterAny This code does not run in normal API dispatch context, so no identity was set. The result was that the access control drivers denied the attempt to deregister callbacks. The callbacks thus continued to trigger after the client was free'd causing fairly predictable use of free memory & a crash. This can be triggered by any client with readonly access when the ACL drivers are active. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>
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