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Alerts This Week
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Ubuntu 16.04 ESM: USN-6012-1 Severe AWS Service Interruptions

ubuntu
Calendar Grey April 6, 2023
Scroller Ubuntu
Stay proactive against kernel vulnerabilities on Ubuntu 16.04. Follow essential update guidelines to secure your system and mitigate risks effectively
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:

Xuewei Feng, Chuanpu Fu, Qi Li, Kun Sun, and Ke Xu discovered that the TCP

implementation in the Linux kernel did not properly handle IPID assignment.

A remote attacker could use this to cause a denial of service (connection

termination) or inject forged data. (CVE-2020-36516)

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk,

Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre

Variant 2 mitigations for AMD processors on Linux were insufficient in some

situations. A local attacker could possibly use this to expose sensitive

information. (CVE-2021-26401)

Jürgen Groß discovered that the Xen subsystem within the Linux kernel did

not adequately limit the number of events driver domains (unprivileged PV

backends) could send to other guest VMs. An attacker in a driver domain

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical kernel ubuntu aws

Update Instructions

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

Ubuntu 16.04 ESM:
   linux-image-4.4.0-1155-aws      4.4.0-1155.170
   linux-image-aws                 4.4.0.1155.159

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-6001-1

CVE-2020-36516, CVE-2021-26401, CVE-2021-28711, CVE-2021-28712,

CVE-2021-28713, CVE-2021-3428, CVE-2021-3659, CVE-2021-3669,

CVE-2021-3732, CVE-2021-3772, CVE-2021-4149, CVE-2021-4203,

CVE-2021-45868, CVE-2022-0487, CVE-2022-0494, CVE-2022-0617,

CVE-2022-1016, CVE-2022-1195, CVE-2022-1205, CVE-2022-1462,

CVE-2022-1516, CVE-2022-1974, CVE-2022-1975, CVE-2022-20132,

CVE-2022-20572, CVE-2022-2318, CVE-2022-2380, CVE-2022-2503,

CVE-2022-2663, CVE-2022-2991, CVE-2022-3061, CVE-2022-3111,

CVE-2022-3303, CVE-2022-3628, CVE-2022-36280, CVE-2022-3646,

CVE-2022-36879, CVE-2022-3903, CVE-2022-39188, CVE-2022-41218,

CVE-2022-41849, CVE-2022-41850, CVE-2022-4662, CVE-2022-47929,

CVE-2023-0394, CVE-2023-1074, CVE-2023-1095, CVE-2023-1118,

CVE-2023-23455, CVE-2023-26545, CVE-2023-26607

Severity
critical
Lowest
Low
Medium
High
Critical

April 06, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical kernel ubuntu aws

Package Information

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