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RedHat: RHSA-2021-5006-04 Critical: Memory Corruption in RHV Host

red hat
Calendar Grey December 8, 2021
Dist Redhat Esm H88
This advisory highlights a critical security vulnerability in Red Hat Virtualization Host, urging users to apply necessary fixes to prevent exploitation risks
An update for redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 8

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

Summary

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):
* nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS) (CVE-2021-43527)
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.

Topics%20covered

Topics Covered

security advisory update critical memory corruption red hat virtualization RHEL 8 RHEV-H

References

https://access.redhat.com/security/cve/CVE-2021-43527 https://access.redhat.com/security/updates/classification/#critical https://access.redhat.com/security/vulnerabilities/RHSB-2021-008

Package List

Red Hat Virtualization 4 Hypervisor for RHEL 8:
Source: redhat-virtualization-host-4.4.9-202112061811_8.5.src.rpm
x86_64: redhat-virtualization-host-image-update-4.4.9-202112061811_8.5.x86_64.rpm
RHEL 8-based RHEV-H for RHEV 4 (build requirements):
Source: redhat-release-virtualization-host-4.4.9-3.el8ev.src.rpm
noarch: redhat-virtualization-host-image-update-placeholder-4.4.9-3.el8ev.noarch.rpm
x86_64: redhat-release-virtualization-host-4.4.9-3.el8ev.x86_64.rpm redhat-release-virtualization-host-content-4.4.9-3.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/


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:5006-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2021:5006
Issue date: 2021-12-08

Topic

An update for redhat-release-virtualization-host andredhat-virtualization-host is now available for Red Hat Virtualization 4for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Critical. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory update critical memory corruption red hat virtualization RHEL 8 RHEV-H

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

Bugs Fixed

2024370 - CVE-2021-43527 nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS)

2029406 - Could not find available upgrade package, when upgrade RHVH to the latest rhvh-4.4.9.3-0.20211202.0+1

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