Operating System:

[RedHat]

Published:

29 November 2023

Protect yourself against future threats.

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

                               ESB-2023.7142
                         kernel-rt security update
                             29 November 2023

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

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

Product:           kernel-rt
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-20593 CVE-2023-5178 

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:7551

Comment: CVSS (Max):  8.8 CVE-2023-5178 (CVSS:3.1/AV:N/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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Synopsis:          Important: kernel-rt security update
Advisory ID:       RHSA-2023:7551
Product:           Red Hat Enterprise Linux NFV TUS (v.8.4)
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:7551
Issue date:        2023-11-28
CVE Names:         CVE-2023-5178 CVE-2023-20593
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.4
Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4
Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 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 NFV TUS (v.8.4) - x86_64 
Red Hat Enterprise Linux RT TUS (v.8.4) - x86_64 

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-
tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)

* hw: amd: Cross-Process Information Leak (CVE-2023-20593)

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

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

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

2241924 - CVE-2023-5178 - kernel: use after free in nvmet_tcp_free_crypto in
NVMe
2217845 - CVE-2023-20593 - hw: amd: Cross-Process Information Leak 

6. Package List:

Red Hat Enterprise Linux NFV TUS (v.8.4)

Source:
kernel-rt-0:4.18.0-305.114.1.rt7.190.el8_4.src.rpm

x86_64:
kernel-rt-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-core-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-core-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-debuginfo-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-devel-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-kvm-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-modules-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-modules-extra-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debuginfo-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-devel-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-kvm-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-modules-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-modules-extra-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm

Red Hat Enterprise Linux RT TUS (v.8.4)

Source:
kernel-rt-0:4.18.0-305.114.1.rt7.190.el8_4.src.rpm

x86_64:
kernel-rt-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-core-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-core-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-debuginfo-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-devel-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-kvm-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-modules-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debug-modules-extra-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debuginfo-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-devel-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-kvm-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-modules-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm
kernel-rt-modules-extra-0:4.18.0-305.114.1.rt7.190.el8_4.x86_64.rpm

7. References:

https://access.redhat.com/security/cve/CVE-2023-5178
https://access.redhat.com/security/cve/CVE-2023-20593
https://access.redhat.com/security/updates/classification/#important

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