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 Hypervisor 7.

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 7 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 7

SRPM
qemu-kvm-rhev-2.1.2-23.el7_1.3.src.rpm	SHA-256: 56f87e6187e376b5ab80ef19bc10db5568d7752e9c0802daae74ce94700dfbd6
x86_64
libcacard-devel-rhev-2.1.2-23.el7_1.3.x86_64.rpm	SHA-256: 1800ce19a9c75922cdb5b10f6f6851150b8584ab7b8c3cbac28edb11e35c98c9
libcacard-rhev-2.1.2-23.el7_1.3.x86_64.rpm	SHA-256: 3fa45f97a91d4f5e28cd73791a5595b292b7c0bf5df3d9be283c5e4aca894f89
libcacard-tools-rhev-2.1.2-23.el7_1.3.x86_64.rpm	SHA-256: 3a3871b2b0f431cd92fac74374f6ac725f31d836c521631f2d0c1e716720ac09
qemu-img-rhev-2.1.2-23.el7_1.3.x86_64.rpm	SHA-256: 2ed7417f544b73f208d177cb9b6e9c77e40e51302801a33c3d0b9c4a69898b0f
qemu-kvm-common-rhev-2.1.2-23.el7_1.3.x86_64.rpm	SHA-256: 30fdc3698760de39a707a8af79c884eb202d95414164ad0bb6ab8e7863b75c99
qemu-kvm-rhev-2.1.2-23.el7_1.3.x86_64.rpm	SHA-256: 5d4d4d7e9005e0b910e2c10755298ab4abb6b74d74dad893c8761487e6e2e3be
qemu-kvm-rhev-debuginfo-2.1.2-23.el7_1.3.x86_64.rpm	SHA-256: 9f34b72d3faf7d9e955e951463efff343ee1146d2a2494ba919581ce71ac6ef4
qemu-kvm-tools-rhev-2.1.2-23.el7_1.3.x86_64.rpm	SHA-256: e21318ee8235faa504945fa179ca8c2346aed05a4d8e1a936e4e0842102b8a7d