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

Synopsis:          Important: Red Hat Virtualization Host security and bug fix
 update [ovirt-4.4.7]
Advisory ID:       RHSA-2021:3235-01
Product:           Red Hat Virtualization
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:3235
Issue date:        2021-08-19
CVE Names:         CVE-2021-3609 CVE-2021-3621 CVE-2021-22543 
                   CVE-2021-22555 
=====================================================================

1. Summary:

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
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 8-based RHEV-H for RHEV 4 (build requirements) - noarch, x86_64
Red Hat Virtualization 4 Hypervisor for RHEL 8 - x86_64

3. 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.

Security Fix(es):

* edk2: remote buffer overflow in IScsiHexToBin function in
NetworkPkg/IScsiDxe ()

* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO
checks (CVE-2021-22543)

* kernel: race condition in net/can/bcm.c leads to local privilege
escalation (CVE-2021-3609)

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

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

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.

Bug Fix(es):

* Rebase package(s) to version: 1.2.23

Highlights, important fixes, or notable enhancements: 

* imgbase should not copy the selinux binary policy file (BZ# 1979624)
(BZ#1989397)

* RHV-H has been rebased on Red Hat Enterprise Linux 8.4 Batch #2.
(BZ#1975177)

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/):

1956284 - edk2: remote buffer overflow in IScsiHexToBin function in
 NetworkPkg/IScsiDxe
1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in
 KVM can bypass RO checks
1971651 - CVE-2021-3609 kernel: race condition in net/can/bcm.c leads to local
 privilege escalation
1975142 - CVE-2021-3621 sssd: shell command injection in sssctl
1975177 - Rebase RHV-H 4.4.7 on RHEL 8.4.0.2
1980101 - CVE-2021-22555 kernel: out-of-bounds write in
 xt_compat_target_from_user() in net/netfilter/x_tables.c
1989397 - Upgrade imgbased to 1.2.23

6. Package List:

Red Hat Virtualization 4 Hypervisor for RHEL 8:

Source:
redhat-virtualization-host-4.4.7-20210804.0.el8_4.src.rpm

x86_64:
redhat-virtualization-host-image-update-4.4.7-20210804.0.el8_4.x86_64.rpm

RHEL 8-based RHEV-H for RHEV 4 (build requirements):

Source:
imgbased-1.2.23-1.el8ev.src.rpm
redhat-release-virtualization-host-4.4.7-4.el8ev.src.rpm

noarch:
imgbased-1.2.23-1.el8ev.noarch.rpm
python3-imgbased-1.2.23-1.el8ev.noarch.rpm
redhat-virtualization-host-image-update-placeholder-4.4.7-4.el8ev.noarch.rpm

x86_64:
redhat-release-virtualization-host-4.4.7-4.el8ev.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-2021-3609
https://access.redhat.com/security/cve/CVE-2021-3621
https://access.redhat.com/security/cve/CVE-2021-22543
https://access.redhat.com/security/cve/CVE-2021-22555
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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