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AUSCERT External Security Bulletin Redistribution
ESB-2024.0554
kernel-rt security update
29 January 2024
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AusCERT Security Bulletin Summary
---------------------------------
Product: kernel-rt
Publisher: Red Hat
Operating System: Red Hat
Resolution: Patch/Upgrade
CVE Names: CVE-2023-42753 CVE-2023-20593 CVE-2023-4622
CVE-2023-2163 CVE-2023-2162
Original Bulletin:
https://access.redhat.com/errata/RHSA-2024:0402
Comment: CVSS (Max): 8.2 CVE-2023-2163 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/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:H/UI:N/S:C/C:H/I:H/A:H
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Red Hat Security Advisory
Synopsis: Important: kernel-rt security update
Advisory ID: RHSA-2024:0402
Product: Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2)
Advisory URL: https://access.redhat.com/errata/RHSA-2024:0402
Issue date: 2024-01-25
CVE Names: CVE-2023-2162 CVE-2023-2163 CVE-2023-4622 CVE-2023-20593
CVE-2023-42753
=====================================================================
1. Summary:
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2
Telecommunications Update Service.
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 Real Time for NFV TUS (v. 8.2) - x86_64
Red Hat Enterprise Linux Real Time TUS (v. 8.2) - 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: bpf: Incorrect verifier pruning leads to unsafe code paths being
incorrectly marked as safe (CVE-2023-2163)
* kernel: use after free in unix_stream_sendpage (CVE-2023-4622)
* kernel: netfilter: potential slab-out-of-bound access due to integer underflow
(CVE-2023-42753)
* kernel: Race Condition leading to UAF in Unix Socket could happen in
sk_receive_queue (BZ#2230094)
* kernel: UAF during login when accessing the shost ipaddress (CVE-2023-2162)
* 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/):
2187773 - CVE-2023-2162 - kernel: UAF during login when accessing the shost
ipaddress
2240249 - CVE-2023-2163 - kernel: bpf: Incorrect verifier pruning leads to
unsafe code paths being incorrectly marked as safe
2237760 - CVE-2023-4622 - kernel: use after free in unix_stream_sendpage
2217845 - CVE-2023-20593 - hw: amd: Cross-Process Information Leak
2239843 - CVE-2023-42753 - kernel: netfilter: potential slab-out-of-bound access
due to integer underflow
6. Package List:
Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2)
Source:
kernel-rt-0:4.18.0-193.120.1.rt13.171.el8_2.src.rpm
x86_64:
kernel-rt-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-core-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-core-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-devel-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-kvm-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-modules-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debuginfo-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-devel-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-kvm-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-modules-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-modules-extra-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
Red Hat Enterprise Linux Real Time TUS (v. 8.2)
Source:
kernel-rt-0:4.18.0-193.120.1.rt13.171.el8_2.src.rpm
x86_64:
kernel-rt-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-core-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-core-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-devel-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-kvm-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-modules-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debuginfo-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-devel-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-kvm-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-modules-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
kernel-rt-modules-extra-0:4.18.0-193.120.1.rt13.171.el8_2.x86_64.rpm
7. References:
https://access.redhat.com/security/cve/CVE-2023-2162
https://access.redhat.com/security/cve/CVE-2023-2163
https://access.redhat.com/security/cve/CVE-2023-4622
https://access.redhat.com/security/cve/CVE-2023-20593
https://access.redhat.com/security/cve/CVE-2023-42753
https://access.redhat.com/security/updates/classification/#important
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