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

                               ESB-2023.7156
                       kpatch-patch security update
                             29 November 2023

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

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

Product:           kpatch-patch
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-42753 CVE-2023-4208 CVE-2023-4207
                   CVE-2023-4206 CVE-2023-4128 CVE-2023-3609

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:7558

Comment: CVSS (Max):  7.8 CVE-2023-4208 (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

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

Synopsis:          Important: kpatch-patch security update
Advisory ID:       RHSA-2023:7558
Product:           Red Hat Enterprise Linux BaseOS EUS (v.8.8)
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:7558
Issue date:        2023-11-28
CVE Names:         CVE-2023-3609 CVE-2023-4128 CVE-2023-4206 CVE-2023-4207
                   CVE-2023-4208 CVE-2023-42753
=====================================================================

1. Summary:

An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.8
Extended Update Support.

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 EUS (v.8.8) - 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: net/sched: cls_u32 component reference counter leak if
tcf_change_indev() fails (CVE-2023-3609)

* kernel: net/sched: Use-after-free vulnerabilities in the net/sched
classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128, CVE-2023-4206,
CVE-2023-4207, CVE-2023-4208)

* kernel: netfilter: potential slab-out-of-bound access due to integer underflow
(CVE-2023-42753)

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/):

2225201 - CVE-2023-3609 - kernel: net/sched: cls_u32 component reference counter
leak if tcf_change_indev() fails
2225511 - CVE-2023-4128 - kernel: net/sched: Use-after-free vulnerabilities in
the net/sched classifiers: cls_fw, cls_u32 and cls_route
2225511 - CVE-2023-4206 - kernel: net/sched: Use-after-free vulnerabilities in
the net/sched classifiers: cls_fw, cls_u32 and cls_route
2225511 - CVE-2023-4207 - kernel: net/sched: Use-after-free vulnerabilities in
the net/sched classifiers: cls_fw, cls_u32 and cls_route
2225511 - CVE-2023-4208 - kernel: net/sched: Use-after-free vulnerabilities in
the net/sched classifiers: cls_fw, cls_u32 and cls_route
2239843 - CVE-2023-42753 - kernel: netfilter: potential slab-out-of-bound access
due to integer underflow

6. Package List:

Red Hat Enterprise Linux BaseOS EUS (v.8.8)

ppc64le:
kpatch-patch-4_18_0-477_10_1-0:1-4.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_10_1-debuginfo-0:1-4.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_10_1-debugsource-0:1-4.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_13_1-0:1-3.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_13_1-debuginfo-0:1-3.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_13_1-debugsource-0:1-3.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_15_1-0:1-3.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_15_1-debuginfo-0:1-3.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_15_1-debugsource-0:1-3.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_21_1-0:1-2.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_21_1-debuginfo-0:1-2.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_21_1-debugsource-0:1-2.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_27_1-0:1-1.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_27_1-debuginfo-0:1-1.el8_8.ppc64le.rpm
kpatch-patch-4_18_0-477_27_1-debugsource-0:1-1.el8_8.ppc64le.rpm

Source:
kpatch-patch-4_18_0-477_10_1-0:1-4.el8_8.src.rpm
kpatch-patch-4_18_0-477_13_1-0:1-3.el8_8.src.rpm
kpatch-patch-4_18_0-477_15_1-0:1-3.el8_8.src.rpm
kpatch-patch-4_18_0-477_21_1-0:1-2.el8_8.src.rpm
kpatch-patch-4_18_0-477_27_1-0:1-1.el8_8.src.rpm

x86_64:
kpatch-patch-4_18_0-477_10_1-0:1-4.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_10_1-debuginfo-0:1-4.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_10_1-debugsource-0:1-4.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_13_1-0:1-3.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_13_1-debuginfo-0:1-3.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_13_1-debugsource-0:1-3.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_15_1-0:1-3.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_15_1-debuginfo-0:1-3.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_15_1-debugsource-0:1-3.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_21_1-0:1-2.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_21_1-debuginfo-0:1-2.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_21_1-debugsource-0:1-2.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_27_1-0:1-1.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_27_1-debuginfo-0:1-1.el8_8.x86_64.rpm
kpatch-patch-4_18_0-477_27_1-debugsource-0:1-1.el8_8.x86_64.rpm

7. References:

https://access.redhat.com/security/cve/CVE-2023-3609
https://access.redhat.com/security/cve/CVE-2023-4128
https://access.redhat.com/security/cve/CVE-2023-4206
https://access.redhat.com/security/cve/CVE-2023-4207
https://access.redhat.com/security/cve/CVE-2023-4208
https://access.redhat.com/security/cve/CVE-2023-42753
https://access.redhat.com/security/updates/classification/#important

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