Synopsis

Important: qemu-kvm-rhev security update

Type/Severity

Security Advisory: Important

Topic

Updated qemu-kvm-rhev packages that fix one security issue are now
available for Red Hat Enterprise Virtualization 3.5.

Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

Description

KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the
user-space component for running virtual machines using KVM.

An out-of-bounds memory access flaw was found in the way QEMU's virtual
Floppy Disk Controller (FDC) handled FIFO buffer access while processing
certain FDC commands. A privileged guest user could use this flaw to crash
the guest or, potentially, execute arbitrary code on the host with the
privileges of the host's QEMU process corresponding to the guest.
(CVE-2015-3456)

Red Hat would like to thank Jason Geffner of CrowdStrike for reporting
this issue.

All qemu-kvm-rhev 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.

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

Affected Products

• Red Hat Virtualization 3 for RHEL 6 x86_64

Fixes

• BZ - 1218611 - CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access

CVEs

• CVE-2015-3456

References

• https://access.redhat.com/security/updates/classification/#important

Red Hat Virtualization 3 for RHEL 6

SRPM
qemu-kvm-rhev-0.12.1.2-2.448.el6_6.3.src.rpm	SHA-256: f9e2902e54449eb45c22ba40d96aaebdc8a3afdd450822dc78746c530e26a448
x86_64
qemu-img-rhev-0.12.1.2-2.448.el6_6.3.x86_64.rpm	SHA-256: 12d9e43a56bc5f7fb521c4fbb27db7baebec40722668a0bf0ddcb8f52abf361d
qemu-kvm-rhev-0.12.1.2-2.448.el6_6.3.x86_64.rpm	SHA-256: 6ce433a9a23ceab85247fb364eb133fff07e7bc60013c9f9509280b1d12b8e86
qemu-kvm-rhev-debuginfo-0.12.1.2-2.448.el6_6.3.x86_64.rpm	SHA-256: 208da9dd95903f659f7506bcce7c805eda6e61f912a397b5379cbee824b21db8
qemu-kvm-rhev-tools-0.12.1.2-2.448.el6_6.3.x86_64.rpm	SHA-256: 599b3df22916cfa61df5868c8d09120ef49055f70c1da07f361848e598a3b33a