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

high Nessus Plugin ID 109755

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Synopsis

The remote Red Hat host is missing one or more security updates for qemu-kvm-rhev.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1369 advisory.

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)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL qemu-kvm-rhev package based on the guidance in RHSA-2018:1369.

Plugin Details

Severity: High

ID: 109755

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

Version: 1.10

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 5/14/2018

Updated: 10/8/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.3

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2018-7550

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/10/2018

Vulnerability Publication Date: 3/1/2018

Reference Information

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

CWE: 125, 787

RHSA: 2018:1369

Detections

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