RHEL 7 : qemu-kvm-rhev (RHSA-2018:1369)

high Nessus Plugin ID 109755
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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) :

* QEMU: i386: multiboot OOB access while loading kernel image (CVE-2018-7550)

* QEMU: cirrus: OOB access when updating VGA display (CVE-2018-7858)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Red Hat would like to thank Cyrille Chatras (Orange.com) and CERT-CC (Orange.com) for reporting CVE-2018-7550 and Ross Lagerwall (Citrix.com) for reporting CVE-2018-7858.

Bug Fix(es) :

* In certain Red Hat Virtualization (RHV) guest configurations, virtual pass-through devices could not be removed properly. A reference count leak in the QEMU emulator has been removed, and the affected devices are now removed reliably. (BZ#1555213)

* Previously, a raw disk image that was using the '--preallocation=full' option in some cases could not be resized. This problem has been fixed and no longer occurs. (BZ#1566587)

* Due to race conditions in the virtio-blk and virtio-scsi services, the QEMU emulator sometimes terminated unexpectedly when shutting down. The race conditions have been removed, and QEMU now exits gracefully. (BZ#1566586)

* Prior to this update, deleting guest snapshots using the RHV GUI in some cases failed due to an incorrect image-seeking algorithm. This update fixes the underlying code, and guest snapshots in RHV can now be deleted successfully. (BZ#1566369)

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2018:1369

https://access.redhat.com/security/cve/cve-2018-7550

https://access.redhat.com/security/cve/cve-2018-7858

Plugin Details

Severity: High

ID: 109755

File Name: redhat-RHSA-2018-1369.nasl

Version: 1.7

Type: local

Agent: unix

Published: 5/14/2018

Updated: 10/24/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS v3

Risk Factor: High

Base Score: 8.8

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

Vulnerability Information

CPE: 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

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Patch Publication Date: 5/10/2018

Vulnerability Publication Date: 3/1/2018

Reference Information

CVE: CVE-2018-7550, CVE-2018-7858

RHSA: 2018:1369