Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 573
Alerts This Week
Warning Icon 1 573

Ubuntu 18.04 LTS USN-6092-1 Critical Kernel Update: Multiple Issues

ubuntu
Calendar Grey May 18, 2023
Dist Ubuntu Esm H88
Explore the patches for Ubuntu 18.04 LTS that fix multiple kernel vulnerabilities. Critical updates are vital for Azure cloud environments, requiring a system reboot post-implementation
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

Details:

Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did

not properly implement speculative execution barriers in usercopy functions

in certain situations. A local attacker could use this to expose sensitive

information (kernel memory). (CVE-2023-0459)

Xingyuan Mo discovered that the x86 KVM implementation in the Linux kernel

did not properly initialize some data structures. A local attacker could

use this to expose sensitive information (kernel memory). (CVE-2023-1513)

It was discovered that a use-after-free vulnerability existed in the iSCSI

TCP implementation in the Linux kernel. A local attacker could possibly use

this to cause a denial of service (system crash). (CVE-2023-2162)

It was discovered that the NET/ROM protocol...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical kernel local attack ubuntu

Update Instructions

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

Ubuntu 18.04 LTS:
   linux-image-4.15.0-1165-azure   4.15.0-1165.180
   linux-image-azure-lts-18.04     4.15.0.1165.133

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   linux-image-4.15.0-1165-azure   4.15.0-1165.180~16.04.1
   linux-image-azure               4.15.0.1165.149

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   linux-image-4.15.0-1165-azure   4.15.0-1165.180~14.04.1
   linux-image-azure               4.15.0.1165.131

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-6092-1

CVE-2023-0459, CVE-2023-1118, CVE-2023-1513, CVE-2023-2162,

CVE-2023-32269

Severity
critical
Lowest
Low
Medium
High
Critical

May 18, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical kernel local attack ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1165.180

Get the latest News and Insights

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