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Red Hat: RHSA-2013-1553-02 Critical: qemu-kvm Buffer Overflow

red hat
Calendar Grey November 21, 2013
Dist Redhat Esm H88
Crucial news from Red Hat concerning qemu-kvm regarding security patches, issue resolutions, and improvements. Discover the details today!
Updated qemu-kvm packages that fix one security issue, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6

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

Summary

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.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow critical update system patch qemu-kvm guest exploit

References

https://access.redhat.com/security/cve/CVE-2013-4344 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.5_Technical_Notes/qemu-kvm.html##RHSA-2013-1553

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: qemu-guest-agent-0.12.1.2-2.415.el6.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6.i686.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.415.el6.x86_64.rpm qemu-img-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.415.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: qemu-guest-agent-0.12.1.2-2.415.el6.x86_64.rpm qemu-img-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.415.el6.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
i386: qemu-guest-agent-0.12.1.2-2.415.el6.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6.i686.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.415.el6.x86_64.rpm qemu-img-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.415.el6.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
i386: qemu-guest-agent-0.12.1.2-2.415.el6.i686.rpm qemu-kvm-debuginfo-0.12.1.2-2.415.el6.i686.rpm
x86_64: qemu-guest-agent-0.12.1.2-2.415.el6.x86_64.rpm qemu-img-0.12.1.2-2.415.el6.x86_64.rpm

Read the Full Advisory


Severity
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Critical

Advisory ID: RHSA-2013:1553-02
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:1553.html
Issue date: 2013-11-21

Topic

Updated qemu-kvm packages that fix one security issue, several bugs, andadd various enhancements are now available for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow critical update system patch qemu-kvm guest exploit

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Bugs Fixed

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 quitting qemu via monitor

879096 - qemu should disable hot-unplug usb-ehci controller and give a prompt if not support

882834 - no warning while check the lacked cpuid_7_0_ebx_feature_name flag

884590 - ovs-ifup affect but ovs-ifdown not affect when run a guest with a wrong netdriver(e.g. ... -device virtio-pci-net,...)

886080 - Qemu segmentation fault when resume VM from stop at rebooting process after do some hot-plug/unplug and S3

886878 - atapi: tray statuses (locked and open) are not reset on boot/reboot of guest

888008 - RFE: qemu-img should be able to report the amount of space used by a qcow2 image stored on a block device

888297 - qemu-ga should be enabled right after installation

Read the Full Advisory

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