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RHEL 7 : redhat-virtualization-host (RHSA-2017:0549)

high Nessus Plugin ID 97844

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Synopsis

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

Description

An update for imgbased, redhat-release-virtualization-host, and redhat-virtualization-host is now available for RHEV 4.X, RHEV-H, and Agents for RHEL-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.

The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor.
Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks.

The following packages have been upgraded to a later upstream version:
redhat-release-virtualization-host (4.0), imgbased (0.8.16), redhat-virtualization-host (4.0). (BZ#1410848, BZ#1430244)

Security Fix(es) :

* A vulnerability was discovered in SPICE in the server's protocol handling. An authenticated attacker could send crafted messages to the SPICE server causing a heap overflow leading to a crash or possible code execution. (CVE-2016-9577)

* A vulnerability was discovered in SPICE in the server's protocol handling. An attacker able to connect to the SPICE server could send crafted messages which would cause the process to crash.
(CVE-2016-9578)

These issues were discovered by Frediano Ziglio (Red Hat).

Bug Fix(es) :

* Previously, imgbased blindly copied /etc from old layers into new layers in order to keep configuration changes between upgrades. This meant that imgbased's behavior differed from RPM, in that unmodified configuration files would be preserved across imgbased upgrades whereas 'yum upgrade' of the same packages would have replaced them.
Now, imgbased compares the sums of files to the originals kept per-layer in /usr/share/factory/etc so that unmodified configuration files are now handled appropriately. (BZ#1418179)

* Previously, some earlier versions of Red Hat Virtualization Host (RHVH) repeatedly prompted for upgrades, even when the most recent version was already installed. This was caused by the RHVH image containing a placeholder package that was made obsolete in order to upgrade. However, the package that was used to upgrade was not propagated to the rpmdb on the new image. Now, upgrading includes the update package in the rpmdb on the new image. (BZ#1422476)

* With this update, Red Hat Virtualization Host (RHVH) now includes the 'screen' package. Previously, ovirt-hosted-engine-setup invoked from a CLI warned users that the 'screen' package was not installed.
Though this was not an explicit requirement when using cockpit, including it provides a better experience if using the CLI.
(BZ#1403729)

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2017:0549

https://access.redhat.com/security/cve/cve-2016-9577

https://access.redhat.com/security/cve/cve-2016-9578

Plugin Details

Severity: High

ID: 97844

File Name: redhat-RHSA-2017-0549.nasl

Version: 3.9

Type: local

Agent: unix

Published: 3/21/2017

Updated: 10/24/2019

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:imgbased, p-cpe:/a:redhat:enterprise_linux:redhat-release-virtualization-host, p-cpe:/a:redhat:enterprise_linux:redhat-virtualization-host-image-update, p-cpe:/a:redhat:enterprise_linux:redhat-virtualization-host-image-update-placeholder, cpe:/o:redhat:enterprise_linux:7

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: 3/16/2017

Vulnerability Publication Date: 7/27/2018

Reference Information

CVE: CVE-2016-9577, CVE-2016-9578

RHSA: 2017:0549