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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.3896
                       kpatch-patch security update
                             16 November 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kpatch-patch
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Increased Privileges -- Remote/Unauthenticated
                   Reduced Security     -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-43267  

Reference:         ESB-2021.3889
                   ESB-2021.3888
                   ESB-2021.3887

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2021:4645

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kpatch-patch security update
Advisory ID:       RHSA-2021:4645-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4645
Issue date:        2021-11-15
CVE Names:         CVE-2021-43267 
=====================================================================

1. Summary:

An update is now available 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:

Red Hat Enterprise Linux BaseOS (v. 8) - ppc64le, x86_64

3. Description:

This is a kernel live patch module which is automatically loaded by the RPM
post-install script to modify the code of a running kernel.

Security Fix(es):

* kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO
message type (CVE-2021-43267)

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/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

2020362 - CVE-2021-43267 kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type

6. Package List:

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
kpatch-patch-4_18_0-348-1-1.el8.src.rpm

ppc64le:
kpatch-patch-4_18_0-348-1-1.el8.ppc64le.rpm
kpatch-patch-4_18_0-348-debuginfo-1-1.el8.ppc64le.rpm
kpatch-patch-4_18_0-348-debugsource-1-1.el8.ppc64le.rpm

x86_64:
kpatch-patch-4_18_0-348-1-1.el8.x86_64.rpm
kpatch-patch-4_18_0-348-debuginfo-1-1.el8.x86_64.rpm
kpatch-patch-4_18_0-348-debugsource-1-1.el8.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-2021-43267
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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