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AUSCERT External Security Bulletin Redistribution
ESB-2023.2221
LSN-0094-1: Kernel Live Patch Security Notice
19 April 2023
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Kernel
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2023-1281 CVE-2023-0468
Original Bulletin:
https://ubuntu.com/security/notices/LSN-0094-1
Comment: CVSS (Max): 7.8 CVE-2023-1281 (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-0094-1: Kernel Live Patch Security Notice
18 April 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)
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-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-4.15 - Linux hardware enablement (HWE) kernel - (>= 4.15.0-69, >
= 4.15.0-143, >= 4.15.0-69)
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
Lin Ma discovered a race condition in the io_uring subsystem in the Linux
kernel, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).(
CVE-2023-0468 )
It was discovered that the Traffic-Control Index (TCINDEX) implementation
in the Linux kernel contained 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-2023-1281 )
Checking update status
The problem can be corrected in these Livepatch versions:
Kernel type 22.04 20.04 18.04 16.04
aws 94.1 94.1 94.1 -
aws-5.15 - 94.1 - -
aws-5.4 - - 94.1 -
aws-hwe - - - 94.1
azure 94.1 94.1 - 94.1
azure-4.15 - - 94.1 -
azure-5.4 - - 94.1 -
gcp 94.1 94.1 - 94.1
gcp-4.15 - - 94.1 -
gcp-5.15 - 94.1 - -
gcp-5.4 - - 94.1 -
generic-4.15 - - 94.1 94.1
generic-5.4 - 94.1 94.1 -
gke 94.1 94.1 - -
gke-4.15 - - 94.1 -
gke-5.15 - 94.1 - -
gke-5.4 - - 94.1 -
gkeop - 94.1 - -
gkeop-5.4 - - 94.1 -
ibm 94.1 94.1 - -
ibm-5.4 - - 94.1 -
linux 94.1 - - -
lowlatency-4.15 - - 94.1 94.1
lowlatency-5.4 - 94.1 94.1 -
oem - - 94.1 -
To check your kernel type and Livepatch version, enter this command:
canonical-livepatch status
References
o CVE-2023-1281
o CVE-2023-0468
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