RHSA-2021:0976 - Security Advisory

Topic

An update for imgbased, redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 8.

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.

Description

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 ovirt-node-ng 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 (4.4.4), redhat-virtualization-host (4.4.4)

Changes to the imgbased component:

• Previously, the chronyd symlink was removed during the upgrade process. As a result, the chronyd service was disabled following the upgrade.

In this release, the chronyd service is enabled after upgrade. (BZ#1903777)

Security Fix(es):

• lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827)

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

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/2974891

Affected Products

• Red Hat Virtualization 4 for RHEL 8 x86_64
• Red Hat Virtualization Host 4 for RHEL 8 x86_64

Fixes

• BZ - 1903777 - chronyd is disabled after upgrading RHV-H 4.4.2 -> 4.4.3
• BZ - 1915877 - Rebase RHV-H 4.4.4 on RHEL 8.3.1
• BZ - 1916659 - Upgrade imgbased to 1.2.16
• BZ - 1921438 - CVE-2020-27827 lldp/openvswitch: denial of service via externally triggered memory leak
• BZ - 1932763 - Rebase RHV-H 4.4.4 on FDP 2.11 (21B)

CVEs

• CVE-2020-27827

References

• https://access.redhat.com/security/updates/classification/#moderate