(RHSA-2010:0633) Important: qspice security update

The Simple Protocol for Independent Computing Environments (SPICE) is a
remote display protocol used in Red Hat Enterprise Linux for viewing
virtualized guests running on the Kernel-based Virtual Machine (KVM)
hypervisor, or on Red Hat Enterprise Virtualization Hypervisor.

It was found that the libspice component of QEMU-KVM on the host did not
validate all pointers provided from a guest system’s QXL graphics card
driver. A privileged guest user could use this flaw to cause the host to
dereference an invalid pointer, causing the guest to crash (denial of
service) or, possibly, resulting in the privileged guest user escalating
their privileges on the host. (CVE-2010-0428)

It was found that the libspice component of QEMU-KVM on the host could be
forced to perform certain memory management operations on memory addresses
controlled by a guest. A privileged guest user could use this flaw to crash
the guest (denial of service) or, possibly, escalate their privileges on
the host. (CVE-2010-0429)

All qspice users should upgrade to these updated packages, which contain
backported patches to correct these issues.