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AUSCERT External Security Bulletin Redistribution
ESB-2023.1410
LSN-0092-1: Kernel Live Patch Security Notice
8 March 2023
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Linux Kernel
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2022-43945 CVE-2022-42896 CVE-2022-4378
Original Bulletin:
https://ubuntu.com/security/notices/LSN-0092-1
Comment: CVSS (Max): 8.8 CVE-2022-42896 (CVSS:3.1/AV:A/AC:L/PR:N/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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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LSN-0092-1: Kernel Live Patch Security Notice
7 March 2023
Several security issues were fixed in the kernel.
Releases
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 ESM
Software Description
o aws - Linux kernel for Amazon Web Services (AWS) systems - (>= 4.15.0-1054,
>= 4.15.0-1119, >= 5.4.0-1009, >= 5.4.0-1061, >= 5.15.0-1000, >=
4.4.0-1098, >= 4.4.0-1129)
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 aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems - (>=
4.15.0-1126)
o azure - Linux kernel for Microsoft Azure Cloud systems - (>= 5.4.0-1010, >=
5.15.0-1000, >= 4.15.0-1063, >= 4.15.0-1078, >= 4.15.0-1114)
o azure-4.15 - Linux kernel for Microsoft Azure Cloud systems - (>=
4.15.0-1115)
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, >= 4.15.0-1118)
o gcp-4.15 - Linux kernel for Google Cloud Platform (GCP) systems - (>=
4.15.0-1121)
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-4.15 - Linux hardware enablement (HWE) kernel - (>= 4.15.0-69, >=
4.15.0-143, >= 4.15.0-69)
o generic-4.4 - Linux kernel - (>= 4.4.0-211, >= 4.4.0-168)
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-4.15 - Linux kernel for Google Container Engine (GKE) systems - (>=
4.15.0-1076)
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 - (>= 5.15.0-24)
o lowlatency - Linux low latency kernel - (>= 5.15.0-25)
o lowlatency-4.15 - Linux hardware enablement (HWE) kernel - (>= 4.15.0-69, >
= 4.15.0-143, >= 4.15.0-69)
o lowlatency-4.4 - Linux kernel - (>= 4.4.0-211, >= 4.4.0-168)
o lowlatency-5.4 - Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)
o oem - Linux kernel for OEM systems - (>= 4.15.0-1063)
Details
Kyle Zeng discovered that the sysctl implementation in the Linux kernel
contained a stack-based buffer overflow. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.(
CVE-2022-4378 )
Tamas Koczka discovered that the Bluetooth L2CAP handshake implementation
in the Linux kernel contained multiple use-after-free vulnerabilities. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.( CVE-2022-42896 )
It was discovered that the NFSD implementation in the Linux kernel did not
properly handle some RPC messages, leading to a buffer overflow. A remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code.( CVE-2022-43945 )
Checking update status
The problem can be corrected in these Livepatch versions:
Kernel type 22.04 20.04 18.04 16.04
aws 92.2 92.1 92.1 92.1
aws-5.15 - 92.2 - -
aws-5.4 - - 92.1 -
aws-hwe - - - 92.1
azure 92.1 92.1 - 92.1
azure-4.15 - - 92.1 -
azure-5.4 - - 92.1 -
gcp 92.2 92.1 - 92.1
gcp-4.15 - - 92.1 -
gcp-5.15 - 92.2 - -
gcp-5.4 - - 92.1 -
generic-4.15 - - 92.1 92.1
generic-4.4 - - - 92.1
generic-5.4 - 92.1 92.1 -
gke 92.2 92.1 - -
gke-4.15 - - 92.1 -
gke-5.15 - 92.2 - -
gke-5.4 - - 92.1 -
gkeop - 92.1 - -
gkeop-5.4 - - 92.1 -
ibm 92.1 92.1 - -
ibm-5.4 - - 92.1 -
linux 92.1 - - -
lowlatency 92.1 - - -
lowlatency-4.15 - - 92.1 92.1
lowlatency-4.4 - - - 92.1
lowlatency-5.4 - 92.1 92.1 -
oem - - 92.1 -
To check your kernel type and Livepatch version, enter this command:
canonical-livepatch status
References
o CVE-2022-42896
o CVE-2022-4378
o CVE-2022-43945
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