This script is Copyright (C) 2017 Tenable Network Security, Inc.
The remote Red Hat host is missing one or more security updates.
An update for qemu-kvm-rhev is now available for RHEV 3.X Hypervisor
and Agents for RHEL-7 and RHEV 4.X RHEV-H and Agents for RHEL-7.
Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.
KVM (Kernel-based Virtual Machine) is a full virtualization solution
for Linux on a variety of architectures. The qemu-kvm-rhev packages
provide the user-space component for running virtual machines that use
KVM in environments managed by Red Hat products.
Security Fix(es) :
* Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator
support is vulnerable to an out-of-bounds access issue. It could occur
while copying VGA data via bitblt copy in backward mode. A privileged
user inside a guest could use this flaw to crash the QEMU process
resulting in DoS or potentially execute arbitrary code on the host
with privileges of QEMU process on the host. (CVE-2017-2615)
* Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator
support is vulnerable to an out-of-bounds access issue. The issue
could occur while copying VGA data in cirrus_bitblt_cputovideo. A
privileged user inside guest could use this flaw to crash the QEMU
process OR potentially execute arbitrary code on host with privileges
of the QEMU process. (CVE-2017-2620)
* An out-of-bounds read-access flaw was found in the QEMU emulator
built with IP checksum routines. The flaw could occur when computing a
TCP/UDP packet's checksum, because a QEMU function used the packet's
payload length without checking against the data buffer's size. A user
inside a guest could use this flaw to crash the QEMU process (denial
of service). (CVE-2016-2857)
Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang
(360.cn Inc.) for reporting CVE-2017-2615 and Ling Liu (Qihoo 360
Inc.) for reporting CVE-2016-2857.
Bug Fix(es) :
* Prior to this update, after migrating a guest virtual machine on the
little-endian variant of IBM Power Systems and resetting the guest,
the guest boot process failed with a 'tcmalloc: large alloc' error
message. This update fixes the bug, and the described problem no
longer occurs. (BZ#1420456)
* The qemu-kvm-rhev package depends on the usbredir and libcacard
packages. However, on the little-endian variant of IBM Power Systems,
smartcard use is not supported and usbredir and libcacard are thus
only available in the Optional channel. As a consequence,
qemu-kvm-rhev was previously not installable on these systems if the
Optional channel was not available for the user. This update removes
usbredir and libcacard as dependencies of qemu-kvm-rhev on
little-endian IBM Power Systems, and qemu-kvm-rhev can now be
installed as expected in the described scenario. (BZ#1420428)
See also :
Update the affected packages.
Risk factor :
Low / CVSS Base Score : 2.1
CVSS Temporal Score : 1.9
Public Exploit Available : true