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Ubuntu 20.04 LTS: USN-5165-1 Critical: Kernel OEM DoS Issues

ubuntu
Calendar Grey November 30, 2021
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-5166-1 outlines critical kernel flaws that require urgent attention to ensure safe functioning.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-5.14: Linux kernel for OEM systems

Details:

It was discovered that the NFC subsystem in the Linux kernel contained a

use-after-free vulnerability in its NFC Controller Interface (NCI)

implementation. A local attacker could possibly use this to cause a denial

of service (system crash) or execute arbitrary code. (CVE-2021-3760)

It was discovered that the SCTP protocol implementation in the Linux kernel

did not properly verify VTAGs in some situations. A remote attacker could

possibly use this to cause a denial of service (connection disassociation).

(CVE-2021-3772)

It was discovered that the AMD Radeon GPU driver in the Linux kernel did

not properly validate writes in the debugfs file system. A privileged

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2021-42327)

Luo Likang discovered that the FireDTV Firewire driver in the Linu...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory doS ubuntu AMD Radeon NCI SCTP issues FireDTV driver

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.14.0-1008-oem     5.14.0-1008.8
  linux-image-oem-20.04d          5.14.0.1008.8

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-5165-1

CVE-2021-3760, CVE-2021-3772, CVE-2021-42327, CVE-2021-42739,

CVE-2021-43056, CVE-2021-43267, CVE-2021-43389

Severity
critical
Lowest
Low
Medium
High
Critical

November 30, 2021

Topics%20covered

Topics Covered

security advisory doS ubuntu AMD Radeon NCI SCTP issues FireDTV driver

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1008.8

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