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Ubuntu 20.04 LTS: USN-5728-2 Critical Denial of Service Risks

ubuntu
Calendar Grey November 18, 2022
Dist Ubuntu Esm H88
Numerous kernel vulnerabilities addressed in Ubuntu 20.04 and 18.04 LTS, encompassing various Denial of Service threats.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

Jann Horn discovered that the Linux kernel did not properly track memory

allocations for anonymous VMA mappings in some situations, leading to

potential data structure reuse. A local attacker could use this to cause a

denial of service (system crash) or possibly execute arbitrary code.

(CVE-2022-42703)

It was discovered that a race condition existed in the memory address space

accounting implementation 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-2022-41222)

It was discovered ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel memory management data exposure

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1057-gkeop    5.4.0-1057.61
  linux-image-5.4.0-1087-gke      5.4.0-1087.94
  linux-image-5.4.0-1095-azure-fde  5.4.0-1095.101+cvm1.1
  linux-image-azure-fde           5.4.0.1095.101+cvm1.33
  linux-image-gke                 5.4.0.1087.94
  linux-image-gke-5.4             5.4.0.1087.94
  linux-image-gkeop               5.4.0.1057.57
  linux-image-gkeop-5.4           5.4.0.1057.57

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1074-raspi    5.4.0-1074.85~18.04.1
  linux-image-raspi-hwe-18.04     5.4.0.1074.73

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-5728-2

https://ubuntu.com/security/notices/USN-5728-1

CVE-2022-20422, CVE-2022-2153, CVE-2022-2978, CVE-2022-29901,

CVE-2022-3028, CVE-2022-3625, CVE-2022-3635, CVE-2022-39188,

CVE-2022-40768, CVE-2022-41222, CVE-2022-42703, CVE-2022-42719

Severity
critical
Lowest
Low
Medium
High
Critical

November 18, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel memory management data exposure

Package Information

https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1087.94
https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1057.61

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