This script is Copyright (C) 2014-2017 Tenable Network Security, Inc.
The remote Red Hat host is missing one or more security updates.
Updated qemu-kvm-rhev packages that fix several security issues are
now available for Red Hat Enterprise Virtualization.
The Red Hat Security Response Team has rated this update as having
Moderate security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.
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 in environments managed by Red Hat Enterprise Virtualization
Multiple integer overflow, input validation, logic error, and buffer
overflow flaws were discovered in various QEMU block drivers. An
attacker able to modify a disk image file loaded by a guest could use
these flaws to crash the guest, or corrupt QEMU process memory on the
host, potentially resulting in arbitrary code execution on the host
with the privileges of the QEMU process. (CVE-2014-0143,
CVE-2014-0144, CVE-2014-0145, CVE-2014-0147)
A buffer overflow flaw was found in the way the
virtio_net_handle_mac() function of QEMU processed guest requests to
update the table of MAC addresses. A privileged guest user could use
this flaw to corrupt QEMU process memory on the host, potentially
resulting in arbitrary code execution on the host with the privileges
of the QEMU process. (CVE-2014-0150)
A divide-by-zero flaw was found in the seek_to_sector() function of
the parallels block driver in QEMU. An attacker able to modify a disk
image file loaded by a guest could use this flaw to crash the guest.
A NULL pointer dereference flaw was found in the QCOW2 block driver in
QEMU. An attacker able to modify a disk image file loaded by a guest
could use this flaw to crash the guest. (CVE-2014-0146)
It was found that the block driver for Hyper-V VHDX images did not
correctly calculate BAT (Block Allocation Table) entries due to a
missing bounds check. An attacker able to modify a disk image file
loaded by a guest could use this flaw to crash the guest.
The CVE-2014-0143 issues were discovered by Kevin Wolf and Stefan
Hajnoczi of Red Hat, the CVE-2014-0144 issues were discovered by Fam
Zheng, Jeff Cody, Kevin Wolf, and Stefan Hajnoczi of Red Hat, the
CVE-2014-0145 issues were discovered by Stefan Hajnoczi of Red Hat,
the CVE-2014-0150 issue was discovered by Michael S. Tsirkin of Red
Hat, the CVE-2014-0142, CVE-2014-0146, and CVE-2014-0147 issues were
discovered by Kevin Wolf of Red Hat, and the CVE-2014-0148 issue was
discovered by Jeff Cody of Red Hat.
All users of qemu-kvm-rhev are advised to upgrade to these updated
packages, which contain backported patches to correct these issues.
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.
See also :
Update the affected packages.
Risk factor :
Medium / CVSS Base Score : 4.9
CVSS Temporal Score : 3.6
Public Exploit Available : false
Family: Red Hat Local Security Checks
Nessus Plugin ID: 79015 ()
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