Exploit/Advisories

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Ubuntu Security Notice USN-5799-1
January 11, 2023

linux-oem-5.17, linux-oem-6.0 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

Software Description:
- linux-oem-5.17: Linux kernel for OEM systems
- linux-oem-6.0: Linux kernel for OEM 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.

Update instructions:

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

Ubuntu 22.04 LTS:
linux-image-5.17.0-1026-oem 5.17.0-1026.27
linux-image-6.0.0-1010-oem 6.0.0-1010.10
linux-image-oem-22.04 5.17.0.1026.24
linux-image-oem-22.04a 5.17.0.1026.24
linux-image-oem-22.04b 6.0.0.1010.10

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-5799-1
CVE-2022-4378

Package Information:
https://launchpad.net/ubuntu/+source/linux-oem-5.17/5.17.0-1026.27
https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1010.10

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