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Ubuntu 20.04 LTS USN-5582-1 High Severity Kernel Threats

ubuntu
Calendar Grey August 25, 2022
Dist Ubuntu Esm H88
Numerous vulnerabilities addressed in Ubuntu's Linux kernel, encompassing critical threats of privilege elevation and service disruption.
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

Details:

Arthur Mongodin discovered that the netfilter subsystem in the Linux kernel

did not properly perform data validation. A local attacker could use this

to escalate privileges in certain situations. (CVE-2022-34918)

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 execute arbitrary code.

(CVE-2022-2586)

It ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service high severity privilege escalation Ubuntu kernel issue

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1089-azure-fde  5.4.0-1089.94+cvm1.2
  linux-image-azure-fde           5.4.0.1089.94+cvm1.29

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-5582-1

CVE-2022-0494, CVE-2022-1048, CVE-2022-1652, CVE-2022-1679,

CVE-2022-1734, CVE-2022-1974, CVE-2022-1975, CVE-2022-2586,

CVE-2022-2588, CVE-2022-28893, CVE-2022-34918

August 25, 2022

Topics%20covered

Topics Covered

security advisory denial of service high severity privilege escalation Ubuntu kernel issue

Package Information

https://launchpad.net/ubuntu/+source/linux-azure-fde/5.4.0-1089.94+cvm1.2

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