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AUSCERT External Security Bulletin Redistribution
ESB-2021.2899
Red Hat Virtualization Host security and bug fix update [ovirt-4.4.7]
27 August 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Red Hat Virtualization Host
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Root Compromise -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-22555 CVE-2021-22543 CVE-2021-3621
CVE-2021-3609
Reference: ESB-2021.2796
ESB-2021.2794
ESB-2021.2792
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:3235
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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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