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Ubuntu 18.04 ESM USN-5357-2 Critical: Kernel Buffer Flaw

ubuntu
Calendar Grey March 31, 2022
Dist Ubuntu Esm H88
Ubuntu 20.04 and 18.04 ESM encounter grave vulnerabilities due to a faulty memory allocation that can result in application failures and unauthorized system control.
The system could be made to crash or run programs as an administrator.

Summary

The system could be made to crash or run programs as an administrator.

Software Description:

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-oracle: Linux kernel for Oracle Cloud systems

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

Details:

It was discovered that the IPsec implementation in the Linux

kernel did not properly allocate enough memory when performing ESP

transformations, leading to a heap-based buffer overflow. A local

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

or possibly execute arbitrary code.

Topics%20covered

Topics Covered

security advisory buffer overflow Ubuntu kernel system crash gcp

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1091-oracle  4.15.0-1091.100
  linux-image-4.15.0-1120-gcp     4.15.0-1120.134
  linux-image-gcp-lts-18.04       4.15.0.1120.139
  linux-image-oracle-lts-18.04    4.15.0.1091.101

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1091-oracle  4.15.0-1091.100~16.04.1
  linux-image-4.15.0-1126-aws-hwe  4.15.0-1126.135~16.04.2
  linux-image-aws-hwe             4.15.0.1126.116
  linux-image-oracle              4.15.0.1091.79

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-5357-2

https://ubuntu.com/security/notices/USN-5357-1

CVE-2022-27666

Severity
critical
Lowest
Low
Medium
High
Critical

March 31, 2022

Topics%20covered

Topics Covered

security advisory buffer overflow Ubuntu kernel system crash gcp

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1120.134
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1091.100

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