Operating System:

[RedHat]

Published:

22 November 2023

Protect yourself against future threats.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.6927
                    kernel security and bug fix update
                             22 November 2023

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

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

Product:           kernel
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-4004 CVE-2023-3776 CVE-2023-3609
                   CVE-2023-1829  

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:7434

Comment: CVSS (Max):  7.8 CVE-2023-4004 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: Red Hat
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

- --------------------------BEGIN INCLUDED TEXT--------------------

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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2023:7434
Product:           Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:7434
Issue date:        2023-11-21
CVE Names:         CVE-2023-1829 CVE-2023-3609 CVE-2023-3776 CVE-2023-4004
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 8.2 Advanced
Update Support, Red Hat Enterprise Linux 8.2 Telecommunications Update Service,
and Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions.

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 AUS (v. 8.2) - x86_64, noarch, ppc64le 
Red Hat Enterprise Linux BaseOS E4S (v. 8.2) - x86_64, noarch, ppc64le 
Red Hat Enterprise Linux BaseOS TUS (v. 8.2) - x86_64, noarch, ppc64le 

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux operating
system.

Security Fix(es):

* kernel: Use-after-free vulnerability in the Linux Kernel traffic control index
filter (CVE-2023-1829)

* kernel: net/sched: cls_u32 component reference counter leak if
tcf_change_indev() fails (CVE-2023-3609)

* kernel: net/sched: cls_fw component can be exploited as result of failure in
tcf_change_indev function (CVE-2023-3776)

* kernel: netfilter: use-after-free due to improper element removal in
nft_pipapo_remove() (CVE-2023-4004)

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.

Bug Fix(es):

* kernel-devel RPM cross-compiled by CKI contains host-arch scripts (BZ#2232140)

* netfilter: RHEL 8.8 phase 2 backports from upstream (BZ#2236819)

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

The system must be rebooted for this update to take effect.

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

2188470 - CVE-2023-1829 - kernel: Use-after-free vulnerability in the Linux
Kernel traffic control index filter
2225201 - CVE-2023-3609 - kernel: net/sched: cls_u32 component reference counter
leak if tcf_change_indev() fails
2225097 - CVE-2023-3776 - kernel: net/sched: cls_fw component can be exploited
as result of failure in tcf_change_indev function
2225275 - CVE-2023-4004 - kernel: netfilter: use-after-free due to improper
element removal in nft_pipapo_remove()

6. Package List:

Red Hat Enterprise Linux BaseOS AUS (v. 8.2)

x86_64:
bpftool-0:4.18.0-193.119.1.el8_2.x86_64.rpm
bpftool-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-core-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-cross-headers-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-core-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-devel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-modules-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-modules-extra-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debuginfo-common-x86_64-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-devel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-modules-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-modules-extra-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-libs-0:4.18.0-193.119.1.el8_2.x86_64.rpm
perf-0:4.18.0-193.119.1.el8_2.x86_64.rpm
perf-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
python3-perf-0:4.18.0-193.119.1.el8_2.x86_64.rpm
python3-perf-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-headers-0:4.18.0-193.119.1.el8_2.x86_64.rpm

Source:
kernel-0:4.18.0-193.119.1.el8_2.src.rpm

noarch:
kernel-abi-whitelists-0:4.18.0-193.119.1.el8_2.noarch.rpm
kernel-doc-0:4.18.0-193.119.1.el8_2.noarch.rpm

Red Hat Enterprise Linux BaseOS E4S (v. 8.2)

ppc64le:
bpftool-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
bpftool-debuginfo-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-core-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-cross-headers-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-debug-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-debug-core-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-debug-debuginfo-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-debug-devel-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-debug-modules-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-debug-modules-extra-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-debuginfo-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-debuginfo-common-ppc64le-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-devel-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-modules-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-modules-extra-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-tools-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-tools-debuginfo-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-tools-libs-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
perf-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
perf-debuginfo-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
python3-perf-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
python3-perf-debuginfo-0:4.18.0-193.119.1.el8_2.ppc64le.rpm
kernel-headers-0:4.18.0-193.119.1.el8_2.ppc64le.rpm

x86_64:
bpftool-0:4.18.0-193.119.1.el8_2.x86_64.rpm
bpftool-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-core-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-cross-headers-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-core-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-devel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-modules-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-modules-extra-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debuginfo-common-x86_64-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-devel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-modules-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-modules-extra-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-libs-0:4.18.0-193.119.1.el8_2.x86_64.rpm
perf-0:4.18.0-193.119.1.el8_2.x86_64.rpm
perf-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
python3-perf-0:4.18.0-193.119.1.el8_2.x86_64.rpm
python3-perf-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-headers-0:4.18.0-193.119.1.el8_2.x86_64.rpm

Source:
kernel-0:4.18.0-193.119.1.el8_2.src.rpm

noarch:
kernel-abi-whitelists-0:4.18.0-193.119.1.el8_2.noarch.rpm
kernel-doc-0:4.18.0-193.119.1.el8_2.noarch.rpm

Red Hat Enterprise Linux BaseOS TUS (v. 8.2)

x86_64:
bpftool-0:4.18.0-193.119.1.el8_2.x86_64.rpm
bpftool-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-core-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-cross-headers-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-core-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-devel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-modules-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debug-modules-extra-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-debuginfo-common-x86_64-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-devel-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-modules-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-modules-extra-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-tools-libs-0:4.18.0-193.119.1.el8_2.x86_64.rpm
perf-0:4.18.0-193.119.1.el8_2.x86_64.rpm
perf-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
python3-perf-0:4.18.0-193.119.1.el8_2.x86_64.rpm
python3-perf-debuginfo-0:4.18.0-193.119.1.el8_2.x86_64.rpm
kernel-headers-0:4.18.0-193.119.1.el8_2.x86_64.rpm

Source:
kernel-0:4.18.0-193.119.1.el8_2.src.rpm

noarch:
kernel-abi-whitelists-0:4.18.0-193.119.1.el8_2.noarch.rpm
kernel-doc-0:4.18.0-193.119.1.el8_2.noarch.rpm

7. References:

https://access.redhat.com/security/cve/CVE-2023-1829
https://access.redhat.com/security/cve/CVE-2023-3609
https://access.redhat.com/security/cve/CVE-2023-3776
https://access.redhat.com/security/cve/CVE-2023-4004
https://access.redhat.com/security/updates/classification/#important

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: https://auscert.org.au/gpg-key/
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=jjIr
-----END PGP SIGNATURE-----