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AUSCERT External Security Bulletin Redistribution
ESB-2023.3555
LSN-0095-1: Kernel Live Patch Security Notice
22 June 2023
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Kernel
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2023-32233 CVE-2023-31436 CVE-2023-2612
CVE-2023-1872 CVE-2023-1380 CVE-2023-0386
Original Bulletin:
https://ubuntu.com/security/notices/LSN-0095-1
Comment: CVSS (Max): 7.8 CVE-2023-32233 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: NVD
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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LSN-0095-1: Kernel Live Patch Security Notice
21 June 2023
Several security issues were fixed in the kernel.
Releases
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
o Ubuntu 18.04 ESM
Software Description
o aws - Linux kernel for Amazon Web Services (AWS) systems - (>= 5.4.0-1009,
>= 5.4.0-1061, >= 5.15.0-1000)
o aws-5.15 - Linux kernel for Amazon Web Services (AWS) systems - (>=
5.15.0-1000)
o aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems - (>=
5.4.0-1069)
o azure - Linux kernel for Microsoft Azure Cloud systems - (>= 5.4.0-1010, >=
5.15.0-1000)
o azure-5.4 - Linux kernel for Microsoft Azure cloud systems - (>=
5.4.0-1069)
o gcp - Linux kernel for Google Cloud Platform (GCP) systems - (>=
5.4.0-1009, >= 5.15.0-1000)
o gcp-5.15 - Linux kernel for Google Cloud Platform (GCP) systems - (>=
5.15.0-1000)
o gcp-5.4 - Linux kernel for Google Cloud Platform (GCP) systems - (>=
5.4.0-1069)
o generic-5.4 - Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)
o gke - Linux kernel for Google Container Engine (GKE) systems - (>=
5.4.0-1033, >= 5.15.0-1000)
o gke-5.15 - Linux kernel for Google Container Engine (GKE) systems - (>=
5.15.0-1000)
o gke-5.4 - Linux kernel for Google Container Engine (GKE) systems - (>=
5.4.0-1009)
o gkeop - Linux kernel for Google Container Engine (GKE) systems - (>=
5.4.0-1009)
o gkeop-5.4 - Linux kernel for Google Container Engine (GKE) systems - (>=
5.4.0-1007)
o ibm - Linux kernel for IBM cloud systems - (>= 5.4.0-1009, >= 5.15.0-1000)
o ibm-5.4 - Linux kernel for IBM cloud systems - (>= 5.4.0-1009)
o linux - Linux kernel - (>= 5.15.0-71, >= 5.15.0-24)
o lowlatency - Linux low latency kernel - (>= 5.15.0-25)
o lowlatency-5.4 - Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)
Details
It was discovered that the OverlayFS implementation in the Linux kernel did
not properly handle copy up operation in some conditions. A local attacker
could possibly use this to gain elevated privileges.( CVE-2023-0386 )
It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform data buffer size validation in some
situations. A physically proximate attacker could use this to craft a
malicious USB device that when inserted, could cause a denial of service
(system crash) or possibly expose sensitive information.( CVE-2023-1380 )
It was discovered that a race condition existed in the io_uring subsystem
in the Linux kernel, leading to a use-after-free vulnerability. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code.( CVE-2023-1872 )
Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu
Linux kernel contained a race condition when handling inode locking in some
situations. A local attacker could use this to cause a denial of service
(kernel deadlock).( CVE-2023-2612 )
Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.( CVE-2023-31436 )
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code.( CVE-2023-32233 )
Checking update status
The problem can be corrected in these Livepatch versions:
Kernel type 22.04 20.04 18.04
aws 95.4 95.4 -
aws-5.15 - 95.4 -
aws-5.4 - - 95.4
azure 95.4 95.4 -
azure-5.4 - - 95.4
gcp 95.4 95.4 -
gcp-5.15 - 95.4 -
gcp-5.4 - - 95.4
generic-5.4 - 95.4 95.4
gke 95.4 95.4 -
gke-5.15 - 95.4 -
gke-5.4 - - 95.4
gkeop - 95.4 -
gkeop-5.4 - - 95.4
ibm 95.4 95.4 -
ibm-5.4 - - 95.4
linux 95.4 - -
lowlatency 95.1 - -
lowlatency-5.4 - 95.4 95.4
To check your kernel type and Livepatch version, enter this command:
canonical-livepatch status
References
o CVE-2023-32233
o CVE-2023-2612
o CVE-2023-0386
o CVE-2023-1872
o CVE-2023-1380
o CVE-2023-31436
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