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AUSCERT External Security Bulletin Redistribution
ESB-2022.1247
LSN-0085-1: Kernel Live Patch Security Notice
24 March 2022
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Kernel Live Patch
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2022-25636 CVE-2022-0492
Original Bulletin:
https://ubuntu.com/security/notices/LSN-0085-1
Comment: CVSS (Max): 7.8 CVE-2022-25636 (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-0085-1: Kernel Live Patch Security Notice
23 March 2022
Several security issues were fixed in the kernel.
Releases
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 ESM
o Ubuntu 14.04 ESM
Software Description
o aws - Linux kernel for Amazon Web Services (AWS) systems - (>= 4.15.0-1054,
>= 5.4.0-1009, >= 5.4.0-1061, >= 4.4.0-1098, >= 4.4.0-1129)
o azure - Linux kernel for Microsoft Azure Cloud systems - (>= 5.4.0-1010, >=
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 gcp - Linux kernel for Google Cloud Platform (GCP) systems - (>=
5.4.0-1009)
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 - (>= 4.4.0-168, >= 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)
o gke-4.15 - Linux kernel for Google Container Engine (GKE) systems - (>=
4.15.0-1076)
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)
o ibm-5.4 - Linux kernel for IBM cloud systems - (>= 5.4.0-1009)
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 - (>= 4.4.0-168, >= 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
Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the
Linux kernel did not properly restrict access to the cgroups v1
release_agent feature. A local attacker could use this to gain
administrative privileges.( CVE-2022-0492 )
Nick Gregory discovered that the Linux kernel incorrectly handled network
offload functionality. A local attacker could use this to cause a denial of
service or possibly execute arbitrary code.( CVE-2022-25636 )
Checking update status
The problem can be corrected in these Livepatch versions:
Kernel type 20.04 18.04 16.04 14.04
aws 85.1 85.1 85.1 -
azure 85.1 - 85.1 -
azure-4.15 - 85.1 - -
gcp 85.1 - - -
generic-4.15 - 85.1 85.1 -
generic-4.4 - - 85.1 85.1
generic-5.4 85.2 85.2 - -
gke 85.1 - - -
gke-4.15 - 85.1 - -
gke-5.4 - 85.1 - -
gkeop 85.1 - - -
gkeop-5.4 - 85.1 - -
ibm 85.1 - - -
ibm-5.4 - 85.1 - -
lowlatency-4.15 - 85.1 85.1 -
lowlatency-4.4 - - 85.1 85.1
lowlatency-5.4 85.2 85.2 - -
oem - 85.1 - -
To check your kernel type and Livepatch version, enter this command:
canonical-livepatch status
References
o CVE-2022-0492
o CVE-2022-25636
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