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

×
Alerts This Week
Warning Icon 1 438
Alerts This Week
Warning Icon 1 438

Ubuntu 20.04 LTS USN-5605-1 Moderate: Azure CVM Kernel Denial Of Service

ubuntu
Calendar Grey September 9, 2022
Dist Ubuntu Esm H88
Several vulnerabilities addressed in Ubuntu's Azure CVM Linux kernel enhancing defense against threats. Upgrade today!
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems

Details:

Asaf Modelevsky discovered that the Intel(R) 10GbE PCI Express (ixgbe)

Ethernet driver for the Linux kernel performed insufficient control flow

management. A local attacker could possibly use this to cause a denial

of service. (CVE-2021-33061)

It was discovered that the virtual terminal driver in the Linux kernel

did not properly handle VGA console font changes, leading to an

out-of-bounds write. A local attacker could use this to cause a denial

of service (system crash) or possibly execute arbitrary code.

(CVE-2021-33656)

Topics%20covered

Topics Covered

security advisory moderate denial of service ubuntu linux kernel cvm

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1090-azure-fde  5.4.0-1090.95+cvm1.1
   linux-image-azure-fde           5.4.0.1090.95+cvm1.30

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-5605-1

CVE-2021-33061, CVE-2021-33656

Severity
important
Lowest
Low
Medium
High
Critical

September 09, 2022

Topics%20covered

Topics Covered

security advisory moderate denial of service ubuntu linux kernel cvm

Package Information

https://launchpad.net/ubuntu/+source/linux-azure-fde/5.4.0-1090.95+cvm1.1

Get the latest News and Insights

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