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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: RHV-H security update
 (redhat-virtualization-host) 4.3.16
Advisory ID:       RHSA-2021:2519-01
Product:           Red Hat Virtualization
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2519
Issue date:        2021-06-22
CVE Names:         CVE-2020-24489 CVE-2021-25217 CVE-2021-27219 
=====================================================================

1. Summary:

An update for redhat-virtualization-host 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 Important. 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.

2. Relevant releases/architectures:

RHEL 7-based RHEV-H for RHEV 4 (build requirements) - noarch, x86_64
Red Hat Virtualization 4 Hypervisor for RHEL 7 - noarch

3. Description:

The redhat-virtualization-host packages provide the Red Hat Virtualization
Host.
These packages include redhat-release-virtualization-host. 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.

Security Fix(es):

* glib: integer overflow in g_bytes_new function on 64-bit platforms due to
an implicit cast from 64 bits to 32 bits (CVE-2021-27219)

* hw: vt-d related privilege escalation (CVE-2020-24489)

* dhcp: stack-based buffer overflow when parsing statements with
colon-separated hex digits in config or lease files in dhcpd and dhclient
(CVE-2021-25217)

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.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

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

5. Bugs fixed (https://bugzilla.redhat.com/):

1929858 - CVE-2021-27219 glib: integer overflow in g_bytes_new function on
 64-bit platforms due to an implicit cast from 64 bits to 32 bits
1948377 - Rebase RHV-H 4.3 EUS on RHGS 3.5.z on RHEL 7 - Batch Update 4
1957238 - Rebase RHV-H 4.3 EUS on RHEL 7.9.z #6
1962650 - CVE-2020-24489 hw: vt-d related privilege escalation
1963258 - CVE-2021-25217 dhcp: stack-based buffer overflow when parsing
 statements with colon-separated hex digits in config or lease files in dhcpd and dhclient

6. Package List:

Red Hat Virtualization 4 Hypervisor for RHEL 7:

Source:
redhat-virtualization-host-4.3.16-20210615.0.el7_9.src.rpm

noarch:
redhat-virtualization-host-image-update-4.3.16-20210615.0.el7_9.noarch.rpm

RHEL 7-based RHEV-H for RHEV 4 (build requirements):

Source:
redhat-release-virtualization-host-4.3.16-1.el7ev.src.rpm
redhat-virtualization-host-4.3.16-20210615.0.el7_9.src.rpm

noarch:
redhat-virtualization-host-image-update-4.3.16-20210615.0.el7_9.noarch.rpm
redhat-virtualization-host-image-update-placeholder-4.3.16-1.el7ev.noarch.rpm

x86_64:
redhat-release-virtualization-host-4.3.16-1.el7ev.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2020-24489
https://access.redhat.com/security/cve/CVE-2021-25217
https://access.redhat.com/security/cve/CVE-2021-27219
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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