Scientific Linux Security Update : qemu-kvm on SL6.x i386/x86_64
Medium Nessus Plugin ID 82989
SynopsisThe remote Scientific Linux host is missing one or more security updates.
DescriptionIt was found that the Cirrus blit region checks were insufficient. A privileged guest user could use this flaw to write outside of VRAM- allocated buffer boundaries in the host's QEMU process address space with attacker-provided data. (CVE-2014-8106)
This update also fixes the following bug :
- Previously, the effective downtime during the last phase of a live migration would sometimes be much higher than the maximum downtime specified by 'migration_downtime' in vdsm.conf. This problem has been corrected. The value of 'migration_downtime' is now honored and the migration is aborted if the downtime cannot be achieved.
After installing this update, shut down all running virtual machines.
Once all virtual machines have shut down, start them again for this update to take effect.
SolutionUpdate the affected packages.