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Ubuntu 20.04: USN-6151-1 Critical Xilinx ZynqMP Kernel Threats

ubuntu
Calendar Grey June 8, 2023
Dist Ubuntu Esm H88
Remedies applied to various Linux kernel vulnerabilities impacting Ubuntu 20.04 LTS, addressing critical security concerns.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors

Details:

It was discovered that the System V IPC implementation in the Linux kernel

did not properly handle large shared memory counts. A local attacker could

use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)

It was discovered that the KVM VMX implementation in the Linux kernel did

not properly handle indirect branch prediction isolation between L1 and L2

VMs. An attacker in a guest VM could use this to expose sensitive

information from the host OS or other guest VMs. (CVE-2022-2196)

Gerald Lee discovered that the USB Gadget file system implementation in the

Linux kernel contained a race condition, leading to a use-after-free

vulnerability in some situations. A local attacker could use this to cause

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

(CVE-2022-4382)

It ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical kernel ubuntu system crash xilinx zynqmp

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1023-xilinx-zynqmp  5.4.0-1023.27

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-6151-1

CVE-2021-3669, CVE-2022-2196, CVE-2022-4382, CVE-2023-23559

Severity
critical
Lowest
Low
Medium
High
Critical

June 08, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical kernel ubuntu system crash xilinx zynqmp

Package Information

https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1023.27

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