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Ubuntu 16.04 ESM: USN-5299-1 Critical: Linux Kernel Buffer Overflow

ubuntu
Calendar Grey February 22, 2022
Dist Ubuntu Esm H88
The recent Ubuntu Security Notice USN-5300-2 details critical updates to the Linux kernel addressing multiple security flaws identified in different releases.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

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

- linux-kvm: Linux kernel for cloud environments

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

Mathy Vanhoef discovered that the Linux kernel’s WiFi implementation could

reassemble mixed encrypted and plaintext fragments. A physically proximate

attacker could possibly use this issue to inject packets or exfiltrate

selected fragments. (CVE-2020-26147)

It was discovered that the bluetooth subsystem in the Linux kernel did not

properly perform access control. An authenticated attacker could possibly

use this to expose sensitive information. (CVE-2020-26558, CVE-2021-0129)

It was discovered that the RPA PCI Hotplug driver implementation in the

Linux kernel did not properly handle device name writes via sysfs, leading

to a buffer overflow. A privileged attack...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow critical access control ubuntu linux kernel

Update Instructions

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

Ubuntu 16.04 ESM:
  linux-image-4.4.0-1100-kvm      4.4.0-1100.109
  linux-image-4.4.0-1135-aws      4.4.0-1135.149
  linux-image-4.4.0-219-generic   4.4.0-219.252
  linux-image-4.4.0-219-lowlatency  4.4.0-219.252
  linux-image-aws                 4.4.0.1135.140
  linux-image-generic             4.4.0.219.226
  linux-image-kvm                 4.4.0.1100.98
  linux-image-lowlatency          4.4.0.219.226
  linux-image-virtual             4.4.0.219.226

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1099-aws      4.4.0-1099.104
  linux-image-4.4.0-219-generic   4.4.0-219.252~14.04.1
  linux-image-4.4.0-219-lowlatency  4.4.0-219.252~14.04.1
  linux-image-aws                 4.4.0.1099.97
  linux-image-generic-lts-xenial  4.4.0.219.190
  linux-image-lowlatency-lts-xenial  4.4.0.219.190
  linux-image-virtual-lts-xenial  4.4.0.219.190

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-5299-1

CVE-2020-26147, CVE-2020-26558, CVE-2021-0129, CVE-2021-28972,

CVE-2021-33034, CVE-2021-34693, CVE-2021-3483, CVE-2021-3564,

CVE-2021-3612, CVE-2021-3679, CVE-2021-38204, CVE-2021-42008,

CVE-2021-45485

Severity
critical
Lowest
Low
Medium
High
Critical

February 22, 2022

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow critical access control ubuntu linux kernel

Package Information

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