A: RHV-H security update (redhat-virtualization-host) 4.3.18 has been released for Red Hat Enterprise Linux 7.

RHSA-2021:3477-01: Important: RHV-H security update (redhat-virtualization-host) 4.3.18

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Red Hat Security Advisory

Synopsis: Important: RHV-H security update (redhat-virtualization-host) 4.3.18
Advisory ID: RHSA-2021:3477-01
Product: Red Hat Virtualization
Advisory URL:   https://access.redhat.com/errata/RHSA-2021:3477
Issue date: 2021-09-09
CVE Names: CVE-2021-3621 CVE-2021-3715 CVE-2021-22555
CVE-2021-31535 CVE-2021-32399
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1. Summary:

An update for redhat-release-virtualization-host and
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):

* sssd: shell command injection in sssctl (CVE-2021-3621)

* kernel: use-after-free in route4_change() in net/sched/cls_route.c
(CVE-2021-3715)

* kernel: out-of-bounds write in xt_compat_target_from_user() in
net/netfilter/x_tables.c (CVE-2021-22555)

* libX11: missing request length checks (CVE-2021-31535)

* kernel: race condition for removal of the HCI controller (CVE-2021-32399)

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.

4. 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

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

1961822 - CVE-2021-31535 libX11: missing request length checks
1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller
1975142 - CVE-2021-3621 sssd: shell command injection in sssctl
1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c
1993988 - CVE-2021-3715 kernel: use-after-free in route4_change() in net/sched/cls_route.c

6. Package List:

Red Hat Virtualization 4 Hypervisor for RHEL 7:

Source:
redhat-virtualization-host-4.3.18-20210903.0.el7_9.src.rpm

noarch:
redhat-virtualization-host-image-update-4.3.18-20210903.0.el7_9.noarch.rpm

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

Source:
redhat-release-virtualization-host-4.3.18-1.el7ev.src.rpm
redhat-virtualization-host-4.3.18-20210903.0.el7_9.src.rpm

noarch:
redhat-virtualization-host-image-update-4.3.18-20210903.0.el7_9.noarch.rpm
redhat-virtualization-host-image-update-placeholder-4.3.18-1.el7ev.noarch.rpm

x86_64:
redhat-release-virtualization-host-4.3.18-1.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-2021-3621
  https://access.redhat.com/security/cve/CVE-2021-3715
  https://access.redhat.com/security/cve/CVE-2021-22555
  https://access.redhat.com/security/cve/CVE-2021-31535
  https://access.redhat.com/security/cve/CVE-2021-32399
  https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.