Alerts This Week
Warning Icon 1 401
Alerts This Week
Warning Icon 1 401

Ubuntu 16.04 LTS USN-6700-2 Critical: Linux Kernel AWS Threats

ubuntu
Calendar Grey March 21, 2024
Dist Ubuntu Esm H88
To mitigate Linux-aws kernel vulnerabilities on Ubuntu 16.04 LTS, update your system regularly, enable AppArmor, and configure the firewall for added security
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

Details:

It was discovered that the Layer 2 Tunneling Protocol (L2TP) implementation

in the Linux kernel contained a race condition when releasing PPPoL2TP

sockets in certain conditions, leading to a use-after-free vulnerability. A

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

or possibly execute arbitrary code. (CVE-2022-20567)

It was discovered that the ext4 file system implementation in the Linux

kernel did not properly handle block device modification while it is

mounted. A privileged attacker could use this to cause a denial of service

(system crash) or possibly expose sensitive information. (CVE-2023-34256)

Eric Dumazet discovered that the netfilter subsystem in the Linux kernel

did not properly handle DCCP conntrack buffers in certain situations,

leading to an out-of-bounds read vul...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service system crash use-after-free linux-aws

Update Instructions

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

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   linux-image-4.4.0-1167-aws      4.4.0-1167.182
   linux-image-aws                 4.4.0.1167.171

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-6700-2

https://ubuntu.com/security/notices/USN-6700-1

CVE-2022-20567, CVE-2023-34256, CVE-2023-39197, CVE-2023-51781,

CVE-2024-0775, CVE-2024-1086, CVE-2024-24855

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6700-2

Topics%20covered

Topics Covered

security advisory denial of service system crash use-after-free linux-aws

Package Information

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here