RedHat: RHSA-2015-0867:01 Important: qemu-kvm security and bug fix update
Summary
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.
It 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 issue was found by Paolo Bonzini of Red Hat.
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. (BZ#1142756)
All qemu-kvm users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. 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.
Summary
Solution
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
References
https://access.redhat.com/security/cve/CVE-2014-8106 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux Desktop (v. 6):
Source:
qemu-kvm-0.12.1.2-2.448.el6_6.2.src.rpm
i386:
qemu-guest-agent-0.12.1.2-2.448.el6_6.2.i686.rpm
qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.2.i686.rpm
x86_64:
qemu-guest-agent-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-img-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.448.el6_6.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
qemu-kvm-0.12.1.2-2.448.el6_6.2.src.rpm
x86_64:
qemu-guest-agent-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-img-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.448.el6_6.2.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
qemu-kvm-0.12.1.2-2.448.el6_6.2.src.rpm
i386:
qemu-guest-agent-0.12.1.2-2.448.el6_6.2.i686.rpm
qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.2.i686.rpm
x86_64:
qemu-guest-agent-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-img-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.448.el6_6.2.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
qemu-kvm-0.12.1.2-2.448.el6_6.2.src.rpm
i386:
qemu-guest-agent-0.12.1.2-2.448.el6_6.2.i686.rpm
qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.2.i686.rpm
x86_64:
qemu-guest-agent-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-img-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.448.el6_6.2.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/
Topic
An updated qemu-kvm package that fixes one security issue and one bug isnow available for Red Hat Enterprise Linux 6.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.
Topic
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
1169454 - CVE-2014-8106 qemu: cirrus: insufficient blit region checks