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AUSCERT External Security Bulletin Redistribution
ESB-2021.2477
RHV-H security update (redhat-virtualization-host) 4.3.17
22 July 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: RHV-H
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-33909 CVE-2021-33034
Reference: ESB-2021.2462
ESB-2021.2461
ESB-2021.2456
ESB-2021.2453
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:2737
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Red Hat Security Advisory
Synopsis: Important: RHV-H security update (redhat-virtualization-host) 4.3.17
Advisory ID: RHSA-2021:2737-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2737
Issue date: 2021-07-21
CVE Names: CVE-2021-33034 CVE-2021-33909
=====================================================================
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):
* kernel: size_t-to-int conversion vulnerability in the filesystem layer
(CVE-2021-33909)
* kernel: use-after-free in net/bluetooth/hci_event.c when destroying an
hci_chan (CVE-2021-33034)
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/):
1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan
1970273 - CVE-2021-33909 kernel: size_t-to-int conversion vulnerability in the filesystem layer
6. Package List:
Red Hat Virtualization 4 Hypervisor for RHEL 7:
Source:
redhat-virtualization-host-4.3.17-20210713.0.el7_9.src.rpm
noarch:
redhat-virtualization-host-image-update-4.3.17-20210713.0.el7_9.noarch.rpm
RHEL 7-based RHEV-H for RHEV 4 (build requirements):
Source:
redhat-release-virtualization-host-4.3.17-1.el7ev.src.rpm
redhat-virtualization-host-4.3.17-20210713.0.el7_9.src.rpm
noarch:
redhat-virtualization-host-image-update-4.3.17-20210713.0.el7_9.noarch.rpm
redhat-virtualization-host-image-update-placeholder-4.3.17-1.el7ev.noarch.rpm
x86_64:
redhat-release-virtualization-host-4.3.17-1.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-2021-33034
https://access.redhat.com/security/cve/CVE-2021-33909
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/RHSB-2021-006
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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