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Red Hat Security Advisory
Synopsis: Important: RHV-H security, bug fix, enhancement update (redhat-virtualization-host) 4.3.13
Advisory ID: RHSA-2021:0395-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0395
Issue date: 2021-02-03
CVE Names: CVE-2020-25684 CVE-2020-25685 CVE-2020-25686
CVE-2021-3156
=====================================================================
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
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts - noarch, ppc64le, x86_64
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):
* sudo: Heap buffer overflow in argument parsing (CVE-2021-3156)
* dnsmasq: loose address/port check in reply_query() makes forging replies
easier for an off-path attacker (CVE-2020-25684)
* dnsmasq: loose query name check in reply_query() makes forging replies
easier for an off-path attacker (CVE-2020-25685)
* dnsmasq: multiple queries forwarded for the same name makes forging
replies easier for an off-path attacker (CVE-2020-25686)
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):
* When performing an upgrade of the Red Hat Virtualization Host using the
command `yum update`, the yum repository for RHV 4.3 EUS is unreachable
As a workaround, run the following command:
`# yum update --releasever=7Server` (BZ#1899378)
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/):
1889686 - CVE-2020-25684 dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker
1889688 - CVE-2020-25685 dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker
1890125 - CVE-2020-25686 dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker
1899378 - rhel-7-server-rhvh-4.3-eus-rpms repo is unavailable
1916111 - Rebase RHV-H 4.3 EUS on RHEL 7.9.z #3
1917684 - CVE-2021-3156 sudo: Heap buffer overflow in argument parsing
6. Package List:
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts:
Source:
vdsm-4.30.51-1.el7ev.src.rpm
noarch:
vdsm-api-4.30.51-1.el7ev.noarch.rpm
vdsm-client-4.30.51-1.el7ev.noarch.rpm
vdsm-common-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-cpuflags-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-ethtool-options-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-fcoe-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-localdisk-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-macspoof-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-nestedvt-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-openstacknet-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-vhostmd-4.30.51-1.el7ev.noarch.rpm
vdsm-hook-vmfex-dev-4.30.51-1.el7ev.noarch.rpm
vdsm-http-4.30.51-1.el7ev.noarch.rpm
vdsm-jsonrpc-4.30.51-1.el7ev.noarch.rpm
vdsm-python-4.30.51-1.el7ev.noarch.rpm
vdsm-yajsonrpc-4.30.51-1.el7ev.noarch.rpm
ppc64le:
vdsm-4.30.51-1.el7ev.ppc64le.rpm
vdsm-gluster-4.30.51-1.el7ev.ppc64le.rpm
vdsm-hook-checkips-4.30.51-1.el7ev.ppc64le.rpm
vdsm-hook-extra-ipv4-addrs-4.30.51-1.el7ev.ppc64le.rpm
vdsm-network-4.30.51-1.el7ev.ppc64le.rpm
x86_64:
vdsm-4.30.51-1.el7ev.x86_64.rpm
vdsm-gluster-4.30.51-1.el7ev.x86_64.rpm
vdsm-hook-checkips-4.30.51-1.el7ev.x86_64.rpm
vdsm-hook-extra-ipv4-addrs-4.30.51-1.el7ev.x86_64.rpm
vdsm-network-4.30.51-1.el7ev.x86_64.rpm
Red Hat Virtualization 4 Hypervisor for RHEL 7:
Source:
redhat-virtualization-host-4.3.13-20210127.0.el7_9.src.rpm
noarch:
redhat-virtualization-host-image-update-4.3.13-20210127.0.el7_9.noarch.rpm
RHEL 7-based RHEV-H for RHEV 4 (build requirements):
Source:
redhat-release-virtualization-host-4.3.13-2.el7ev.src.rpm
redhat-virtualization-host-4.3.13-20210127.0.el7_9.src.rpm
noarch:
redhat-virtualization-host-image-update-4.3.13-20210127.0.el7_9.noarch.rpm
redhat-virtualization-host-image-update-placeholder-4.3.13-2.el7ev.noarch.rpm
x86_64:
redhat-release-virtualization-host-4.3.13-2.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-2020-25684
https://access.redhat.com/security/cve/CVE-2020-25685
https://access.redhat.com/security/cve/CVE-2020-25686
https://access.redhat.com/security/cve/CVE-2021-3156
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/RHSB-2021-001
https://access.redhat.com/security/vulnerabilities/RHSB-2021-002
8. Contact:
The Red Hat security contact is <[email protected]>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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