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Ubuntu 22.10 USN-5832-1 Critical: Linux Kernel Denial Of Service Threats

ubuntu
Calendar Grey January 30, 2023
Dist Ubuntu Esm H88
A variety of vulnerabilities in the Linux kernel impacting Raspberry Pi environments were resolved in USN-5832-1 dated January 30, 2023.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-raspi: Linux kernel for Raspberry Pi systems

Details:

Kyle Zeng discovered that the sysctl implementation in the Linux kernel

contained a stack-based buffer overflow. A local attacker could use this to

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

(CVE-2022-4378)

Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation

in the Linux kernel contained multiple use-after-free vulnerabilities. A

physically proximate attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2022-42896)

It was discovered that the Xen netback driver in the Linux kernel did not

properly handle packets structured in certain ways. An attacker in a guest

VM could possibly use this to cause a denial of service (host NIC

availability). (CVE-2022-3643)

It was discovered that an integer overflow vulnerability ex...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical system crash linux-raspi

Update Instructions

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

Ubuntu 22.10:
   linux-image-5.19.0-1012-raspi   5.19.0-1012.19
   linux-image-5.19.0-1012-raspi-nolpae  5.19.0-1012.19
   linux-image-raspi               5.19.0.1012.11
   linux-image-raspi-nolpae        5.19.0.1012.11

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-5832-1

CVE-2022-3643, CVE-2022-42896, CVE-2022-4378, CVE-2022-45934

Severity
critical
Lowest
Low
Medium
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Critical

January 30, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical system crash linux-raspi

Package Information

https://launchpad.net/ubuntu/+source/linux-raspi/5.19.0-1012.19

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