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Alerts This Week
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Ubuntu 16.04 ESM: USN-6014-1 Critical: Denial Of Service Risks

ubuntu
Calendar Grey April 12, 2023
Scroller Ubuntu
A variety of security patches have been implemented in the Linux kernel to mitigate significant threats for MacOS users.
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-kvm: Linux kernel for cloud environments

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

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 (un...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu system crash data exposure Linux kernel

Update Instructions

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

Ubuntu 16.04 ESM:
   linux-image-4.4.0-1118-kvm      4.4.0-1118.128
   linux-image-4.4.0-239-generic   4.4.0-239.273
   linux-image-4.4.0-239-lowlatency  4.4.0-239.273
   linux-image-generic             4.4.0.239.245
   linux-image-generic-lts-xenial  4.4.0.239.245
   linux-image-kvm                 4.4.0.1118.115
   linux-image-lowlatency          4.4.0.239.245
   linux-image-lowlatency-lts-xenial  4.4.0.239.245
   linux-image-virtual             4.4.0.239.245
   linux-image-virtual-lts-xenial  4.4.0.239.245

Ubuntu 14.04 ESM:
   linux-image-4.4.0-239-generic   4.4.0-239.273~14.04.1
   linux-image-4.4.0-239-lowlatency  4.4.0-239.273~14.04.1
   linux-image-generic-lts-xenial  4.4.0.239.207
   linux-image-lowlatency-lts-xenial  4.4.0.239.207
   linux-image-virtual-lts-xenial  4.4.0.239.207

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-6014-1

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 12, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu system crash data exposure Linux kernel

Package Information

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