RHEL 7 : qemu-kvm (RHSA-2014:1669)
Low Nessus Plugin ID 78594
SynopsisThe remote Red Hat host is missing one or more security updates.
DescriptionUpdated qemu-kvm packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having Low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the user-space component for running virtual machines using KVM.
An information leak flaw was found in the way QEMU's VGA emulator accessed frame buffer memory for high resolution displays. A privileged guest user could use this flaw to leak memory contents of the host to the guest by setting the display to use a high resolution in the guest. (CVE-2014-3615)
This issue was discovered by Laszlo Ersek of Red Hat.
This update also fixes the following bug :
* This update fixes a regression in the scsi_block_new_request() function, which caused all read requests to through SG_IO if the host cache was not used. (BZ#1141189)
All qemu-kvm users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. 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.