RedHat: RHSA-2016-1585:01 Moderate: qemu-kvm security update
Summary
KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. The qemu-kvm packages provide the
user-space component for running virtual machines using KVM.
Security Fix(es):
* Quick emulator(Qemu) built with the virtio framework is vulnerable to an
unbounded memory allocation issue. It was found that a malicious guest user
could submit more requests than the virtqueue size permits. Processing a
request allocates a VirtQueueElement and therefore causes unbounded memory
allocation on the host controlled by the guest. (CVE-2016-5403)
Red Hat would like to thank hongzhenhao (Marvel Team) for reporting this
issue.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
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.
References
https://access.redhat.com/security/cve/CVE-2016-5403 https://access.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux Desktop (v. 6):
Source:
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm
i386:
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.i686.rpm
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.i686.rpm
x86_64:
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm
x86_64:
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm
i386:
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.i686.rpm
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.i686.rpm
ppc64:
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.ppc64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.ppc64.rpm
x86_64:
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm
i386:
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.i686.rpm
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.i686.rpm
x86_64:
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.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 update for qemu-kvm is now available for Red Hat Enterprise Linux 6.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References 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, ppc64, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Bugs Fixed
1358359 - CVE-2016-5403 Qemu: virtio: unbounded memory allocation on host via guest leading to DoS