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Red Hat Virtualization: RHSA-2021-3477-01 Critical RHV-H Security Threat

red hat
Calendar Grey September 9, 2021
Dist Redhat Esm H88
Important RHV-H security patch for Red Hat Virtualization 4 tackling several major vulnerabilities.
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

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. 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):
* sssd: shell command injection in sssctl (CVE-2021-3621)
* kernel: use-after-free in route4_change() in net/sched/cls_route.c (CVE-2021-3715)
* kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)
* libX11: missing request length checks (CVE-2021-31535)
* kernel: race condition for removal of the HCI controller (CVE-2021-32399)
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 information security important patch Red Hat Virtualization RHV-H update JVM impact

References

https://access.redhat.com/security/cve/CVE-2021-3621 https://access.redhat.com/security/cve/CVE-2021-3715 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/cve/CVE-2021-31535 https://access.redhat.com/security/cve/CVE-2021-32399 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Virtualization 4 Hypervisor for RHEL 7:
Source: redhat-virtualization-host-4.3.18-20210903.0.el7_9.src.rpm
noarch: redhat-virtualization-host-image-update-4.3.18-20210903.0.el7_9.noarch.rpm
RHEL 7-based RHEV-H for RHEV 4 (build requirements):
Source: redhat-release-virtualization-host-4.3.18-1.el7ev.src.rpm redhat-virtualization-host-4.3.18-20210903.0.el7_9.src.rpm
noarch: redhat-virtualization-host-image-update-4.3.18-20210903.0.el7_9.noarch.rpm redhat-virtualization-host-image-update-placeholder-4.3.18-1.el7ev.noarch.rpm
x86_64: redhat-release-virtualization-host-4.3.18-1.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/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3477-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3477
Issue date: 2021-09-09

Topic

An update for redhat-release-virtualization-host andredhat-virtualization-host is now available for Red Hat Virtualization 4for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory information security important patch Red Hat Virtualization RHV-H update JVM impact

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

Bugs Fixed

1961822 - CVE-2021-31535 libX11: missing request length checks

1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller

1975142 - CVE-2021-3621 sssd: shell command injection in sssctl

1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c

1993988 - CVE-2021-3715 kernel: use-after-free in route4_change() in net/sched/cls_route.c

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