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OpenSUSE: OS-2021:2452-12 Critical: Libvirt Vulnerability Patch

red hat
Calendar Grey December 6, 2011
Dist Redhat Esm H88
Revised qemu-kvm versions address a security vulnerability and multiple bugs within Red Hat Enterprise Linux 6, assessed as having moderate severity.
Updated qemu-kvm packages that fix one security issue, multiple 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/kb/docs/DOC-11259

Summary

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM.
It was found that qemu-kvm did not properly drop supplemental group privileges when the root user started guests from the command line ("/usr/libexec/qemu-kvm") with the "-runas" option. A qemu-kvm process started this way could use this flaw to gain access to files on the host that are accessible to the supplementary groups and not accessible to the primary group. (CVE-2011-2527)
Note: This issue only affected qemu-kvm when it was started directly from the command line. It did not affect the Red Hat Enterprise Virtualization platform or applications that start qemu-kvm via libvirt, such as the Virtual Machine Manager (virt-manager).
This update also fixes several bugs and adds various enhancements. Documentation for these bug fixes and enhancements will be available shortly from the Technical Notes document, linked to in the References section.
All users of qemu-kvm 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 moderate bug fix security fix Red Hat Enterprise Linux enhancements qemu-kvm

References

https://access.redhat.com/security/cve/CVE-2011-2527 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/search/

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
x86_64: qemu-img-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.209.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: qemu-img-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.209.el6.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
x86_64: qemu-img-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.209.el6.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
x86_64: qemu-img-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-debuginfo-0.12.1.2-2.209.el6.x86_64.rpm qemu-kvm-tools-0.12.1.2-2.209.el6.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package


Advisory ID: RHSA-2011:1531-03
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1531.html
Issue date: 2011-12-06

Topic

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

Topics%20covered

Topics Covered

security advisory moderate bug fix security fix Red Hat Enterprise Linux enhancements qemu-kvm

Relevant Releases Architectures

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

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

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

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

Bugs Fixed

561414 - Writes to virtual usb-storage produce I/O errors599306 - Some strange behaviors on key's appearance viewed by using vnc

609342 - rhel3u9 install can't find package after inserting second CD, but install can continue

621482 - [RFE] Be able to get progress from qemu-img

624983 - QEMU should support the newer set of MSRs for kvmclock

627585 - Improve error messages for bad options in -drive and -device

633370 - [6.1 FEAT] Enhance QED image format to support streaming from remote systems

633380 - [6.2 FEAT] Include QED image format for KVM guests

645351 - Add support for USB 2.0 (EHCI) to QEMU

655719 - no error pops when change cd to non-exist file

656779 - Core dumped when hot plug/un-plug virtio serial port to the same chardev

658467 - kvm clock breaks migration result stability - for unit test propose

669581 - Migration Never end while Use firewall reject migration tcp port

676982 - RFE: no qmp command for live snapshot

678729 - Hotplug VF/PF with invalid addr value leading to qemu-kvm process quit with core dump

678731 - Update qemu-kvm -device pci-assign,? properties

680378 - no error message when loading zero size internal snapshot

681736 - Guest->Host communication stops for other ports after one port is unplugged

682227 - qemu-kvm doesn't exit when binding to specified port fails

693645 - RFE: add spice option to enable/disable copy paste

694373 - ballooning value reset to original value after setting a negative number

Read the Full Advisory

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