RHEL 7 : qemu-kvm-rhev (RHSA-2015:1931)

High Nessus Plugin ID 117309

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

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 Moderate
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.

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.

It was found that the QEMU's websocket frame decoder processed
incoming frames without limiting resources used to process the header
and the payload. An attacker able to access a guest's VNC console
could use this flaw to trigger a denial of service on the host by
exhausting all available memory and CPU. (CVE-2015-1779)

This issue was discovered by Daniel P. Berrange of Red Hat.

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

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2015:1931

https://access.redhat.com/security/cve/cve-2015-1779

Plugin Details

Severity: High

ID: 117309

File Name: redhat-RHSA-2015-1931.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2018/09/06

Modified: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS v3.0

Base Score: 8.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libcacard-devel-rhev, p-cpe:/a:redhat:enterprise_linux:libcacard-rhev, p-cpe:/a:redhat:enterprise_linux:libcacard-tools-rhev, p-cpe:/a:redhat:enterprise_linux:qemu-img-rhev, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-common-rhev, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-rhev-debuginfo, p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tools-rhev, cpe:/o:redhat:enterprise_linux:7

Patch Publication Date: 2015/10/26

Reference Information

CVE: CVE-2015-1779

RHSA: 2015:1931