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Ubuntu 20.04 LTS USN-5139-1 Critical: Multiple Kernel Threats

ubuntu
Calendar Grey November 11, 2021
Dist Ubuntu Esm H88
Various vulnerabilities were addressed in the Ubuntu kernel, particularly for OEM configurations, affecting both system reliability and overall security.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-5.10: Linux kernel for OEM systems

Details:

Ilja Van Sprundel discovered that the SCTP implementation in the Linux

kernel did not properly perform size validations on incoming packets in

some situations. An attacker could possibly use this to expose sensitive

information (kernel memory). (CVE-2021-3655)

It was discovered that the AMD Cryptographic Coprocessor (CCP) driver in

the Linux kernel did not properly deallocate memory in some error

conditions. A local attacker could use this to cause a denial of service

(memory exhaustion). (CVE-2021-3744, CVE-2021-3764)

It was discovered that the NFC protocol implementation 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 an integer...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel local attack information exposure memory

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.10.0-1051-oem     5.10.0-1051.53
  linux-image-oem-20.04           5.10.0.1051.53
  linux-image-oem-20.04b          5.10.0.1051.53

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-5139-1

CVE-2021-3655, CVE-2021-3744, CVE-2021-3760, CVE-2021-3764,

CVE-2021-41864, CVE-2021-43056, CVE-2021-43389

Severity
critical
Lowest
Low
Medium
High
Critical

November 11, 2021

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel local attack information exposure memory

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1051.53

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