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Ubuntu 16.04 ESM: USN-5560-2 Critical Denial Of Service Fixes

ubuntu
Calendar Grey August 10, 2022
Dist Ubuntu Esm H88
Resolutions for various kernel vulnerabilities in Ubuntu, mitigating denial of service and execution threats posed by local intruders.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe: Linux hardware enablement (HWE) kernel

- linux-oracle: Linux kernel for Oracle Cloud systems

Details:

Zhenpeng Lin discovered that the network packet scheduler implementation in

the Linux kernel did not properly remove all references to a route filter

before freeing it in some situations. A local attacker could use this to

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

(CVE-2022-2588)

It was discovered that the netfilter subsystem of the Linux kernel did not

prevent one nft object from referencing an nft set in another nft table,

leading to a use-after-free vulnerability. A local attacker could use this

to cause a denial of service (system crash) or e...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical issue kernel update local attack ubuntu system crash

Update Instructions

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

Ubuntu 16.04 ESM:
   linux-image-4.15.0-1104-oracle  4.15.0-1104.115~16.04.1
   linux-image-4.15.0-1134-gcp     4.15.0-1134.150~16.04.2
   linux-image-4.15.0-1139-aws-hwe  4.15.0-1139.150~16.04.1
   linux-image-4.15.0-1149-azure   4.15.0-1149.164~16.04.1
   linux-image-4.15.0-191-generic  4.15.0-191.202~16.04.1
   linux-image-4.15.0-191-lowlatency  4.15.0-191.202~16.04.1
   linux-image-aws-hwe             4.15.0.1139.126
   linux-image-azure               4.15.0.1149.136
   linux-image-gcp                 4.15.0.1134.129
   linux-image-generic-hwe-16.04   4.15.0.191.178
   linux-image-gke                 4.15.0.1134.129
   linux-image-lowlatency-hwe-16.04  4.15.0.191.178
   linux-image-oem                 4.15.0.191.178
   linux-image-oracle              4.15.0.1104.88
   linux-image-virtual-hwe-16.04   4.15.0.191.178

Ubuntu 14.04 ESM:
   linux-image-4.15.0-1149-azure   4.15.0-1149.164~14.04.1
   linux-image-azure               4.15.0.1149.118

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-5560-2

https://ubuntu.com/security/notices/USN-5560-1

CVE-2022-0494, CVE-2022-1048, CVE-2022-1195, CVE-2022-1652,

CVE-2022-1679, CVE-2022-1729, CVE-2022-1734, CVE-2022-1974,

CVE-2022-1975, CVE-2022-2586, CVE-2022-2588, CVE-2022-33981,

CVE-2022-34918

Severity
critical
Lowest
Low
Medium
High
Critical

August 10, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical issue kernel update local attack ubuntu system crash

Package Information

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