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

×
Alerts This Week
Warning Icon 1 754
Alerts This Week
Warning Icon 1 754

Ubuntu 20.04 LTS USN-6605-2 Critical KVM Issues: Denial Of Service

ubuntu
Calendar Grey January 29, 2024
Dist Ubuntu Esm H88
Multiple weaknesses in the Ubuntu Linux core require urgent patches to prevent potential risks and operational disruptions.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-kvm: Linux kernel for cloud environments

Details:

Lin Ma discovered that the netfilter subsystem in the Linux kernel did not

properly validate network family support while creating a new netfilter

table. A local attacker could use this to cause a denial of service or

possibly execute arbitrary code. (CVE-2023-6040)

It was discovered that the CIFS network file system implementation in the

Linux kernel did not properly validate the server frame size in certain

situation, leading to an out-of-bounds read vulnerability. An attacker

could use this to construct a malicious CIFS image that, when operated on,

could cause a denial of service (system crash) or possibly expose sensitive

information. (CVE-2023-6606)

Budimir Markovic, Lucas De Marchi, and Pengfei Xu discovered that the perf

subsystem in the Linux kernel did not properly validate all event sizes

when attaching new eve...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu KVM

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1105-kvm      5.4.0-1105.112
   linux-image-kvm                 5.4.0.1105.101

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-6605-2

https://ubuntu.com/security/notices/USN-6605-1

CVE-2023-6040, CVE-2023-6606, CVE-2023-6931, CVE-2023-6932

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6605-2

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu KVM

Package Information

Get the latest News and Insights

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