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Ubuntu 20.04 LTS USN-5377-1 Critical: BlueField Denial of Service Issues

ubuntu
Calendar Grey April 12, 2022
Dist Ubuntu Esm H88
Several important patches for the Linux kernel in Ubuntu 20.04 LTS rectify access control vulnerabilities and prevent service disruptions.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-bluefield: Linux kernel for NVIDIA BlueField platforms

Details:

It was discovered that the network traffic control 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-2022-1055)

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)

Jürgen Groß discovered that the Xen subsystem within the Linux kernel did

not adequately limit the number of events driver domains (unprivileged PV

backends) could send to other guest VMs. An attacker in a driver domain

could use this to cause a denial of service in other guest VMs.

(CVE-2021-28711, CVE-2021-28712, ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu network vulnerabilities linux-bluefield

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1032-bluefield  5.4.0-1032.35
  linux-image-bluefield           5.4.0.1032.33

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-5377-1

CVE-2021-28711, CVE-2021-28712, CVE-2021-28713, CVE-2021-28714,

CVE-2021-28715, CVE-2021-4135, CVE-2021-43976, CVE-2021-44733,

CVE-2021-45095, CVE-2021-45469, CVE-2021-45480, CVE-2022-0435,

CVE-2022-0492, CVE-2022-1055, CVE-2022-27666

Severity
critical
Lowest
Low
Medium
High
Critical

April 13, 2022

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu network vulnerabilities linux-bluefield

Package Information

https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1032.35

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