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Ubuntu 22.04 LTS USN-6223-1 Critical: Azure Kernel DoS Risks

ubuntu
Calendar Grey July 12, 2023
Dist Ubuntu Esm H88
Uncover essential changes for Ubuntu's Linux kernel fixing various security flaws that may result in system failures.
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:

It was discovered that the TUN/TAP driver in the Linux kernel did not

properly initialize socket data. A local attacker could use this to cause a

denial of service (system crash). (CVE-2023-1076)

It was discovered that the Real-Time Scheduling Class implementation in the

Linux kernel contained a type confusion vulnerability in some situations. A

local attacker could use this to cause a denial of service (system crash).

(CVE-2023-1077)

It was discovered that the ASUS HID driver in the Linux kernel did not

properly handle device removal, leading to a use-after-free vulnerability.

A local attacker with physical access could plug in a specially crafted USB

device to cause a denial of service (system crash). (CVE-2023-1079)

It was discovered that the Xircom PCMCIA network device driver in the Linux

kerne...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical kernel ubuntu dos azure linux-azure-fde

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1041-azure-fde  5.15.0-1041.48.1
   linux-image-azure-fde           5.15.0.1041.48.19
   linux-image-azure-fde-lts-22.04  5.15.0.1041.48.19

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-6223-1

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2023220

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2023577

CVE-2023-1076, CVE-2023-1077, CVE-2023-1079, CVE-2023-1670,

CVE-2023-1859, CVE-2023-1998, CVE-2023-25012, CVE-2023-2985,

CVE-2023-35788

Severity
critical
Lowest
Low
Medium
High
Critical

July 12, 2023

Topics%20covered

Topics Covered

security advisory critical kernel ubuntu dos azure linux-azure-fde

Package Information

https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1041.48.1

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