Please Install the Updated Packages.

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems that is built into the standard Red Hat Enterprise Linux kernel. The qemu-kvm packages form the user-space component for running virtual machines using KVM. A buffer overflow flaw was found in the way QEMU processed the SCSI 'REPORT LUNS' command when more than 256 LUNs were specified for a single SCSI target. A privileged guest user could use this flaw to corrupt QEMU process memory on the host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process. (CVE-2013-4344) This issue was discovered by Asias He of Red Hat. These updated qemu-kvm packages include numerous bug fixes and various enhancements. Space precludes documenting all of these changes in this advisory. Users are directed to the Red Hat Enterprise Linux 6.5 Technical Notes, linked to in the References, for information on the most significant of these changes. All qemu-kvm users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements. 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. 4. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/site/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com): 670162 - [RFE] Removing the backing file using qemu-img re-base 796011 - Prompt error of trigger blkdebug: BLKDBG_CLUSTER_FREE event is not the same as expected 817066 - QEMU should disable VNC password auth when in FIPS 140-2 mode 821741 - (re-)enable SEP flag on CPU models 843797 - qemu-kvm core dumps when virtio-net(w/ tx=timer and vhost=on) RHEL.6(w/ msi-x enabled) guest shutting down 848070 - [RHEL 6.5] Add glusterfs support to qemu 856505 - Missing error message in bdrv_commit to read-only backing file 864378 - qemu-img convert fails with Floating Point Exception with zero length source image 869496 - screendump wont save PPM image file if qemu-kvm booted with '-S' 869586 - core dump happens when quitt ... Description truncated, for more information please check the Reference URL

qemu-kvm on Red Hat Enterprise Linux Desktop (v. 6), Red Hat Enterprise Linux Server (v. 6), Red Hat Enterprise Linux Workstation (v. 6)

• https://www.redhat.com/archives/rhsa-announce/2013-November/msg00021.html

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Updated on 2015-03-25