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Ubuntu 20.04 LTS USN-6681-4 Critical: Denial of Service Fixes

ubuntu
Calendar Grey March 19, 2024
Dist Ubuntu Esm H88
Ubuntu Security Bulletin USN-6681-4 highlights urgent kernel vulnerabilities, providing remedies for localized threats and system enhancements.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems

Details:

Wenqing Liu discovered that the f2fs file system implementation in the

Linux kernel did not properly validate inode types while performing garbage

collection. An attacker could use this to construct a malicious f2fs image

that, when mounted and operated on, could cause a denial of service (system

crash). (CVE-2021-44879)

It was discovered that the DesignWare USB3 for Qualcomm SoCs driver in the

Linux kernel did not properly handle certain error conditions during device

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

service (system crash). (CVE-2023-22995)

Bien Pham discovered that the netfiler subsystem in the Linux kernel

contained a race condition, leading to a use-after-free vulnerability. A

local user could ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service ubuntu linux kernel local attacks

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1120-aws      5.4.0-1120.130
   linux-image-aws-lts-20.04       5.4.0.1120.117

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1120-aws      5.4.0-1120.130~18.04.1
   linux-image-aws                 5.4.0.1120.98

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-6681-4

https://ubuntu.com/security/notices/USN-6681-1

CVE-2021-44879, CVE-2023-22995, CVE-2023-4244, CVE-2023-51779,

CVE-2023-51780, CVE-2023-51782, CVE-2023-6121, CVE-2024-0340

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6681-4

Topics%20covered

Topics Covered

security advisory denial of service ubuntu linux kernel local attacks

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1120.130

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