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Ubuntu Security Notice USN-5590-1

Ubuntu Security Notice USN-5590-1
Posted Aug 31, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5590-1 - Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter subsystem in the Linux kernel did not properly handle rules that truncated packets below the packet header size. When such rules are in place, a remote attacker could possibly use this to cause a denial of service.

tags | advisory, remote, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2022-36946
SHA-256 | 2e5da57fb88f0c77d49cc30ea10370f8b37151cd437de80a34fb35585b05c051

Ubuntu Security Notice USN-5590-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-5590-1
August 30, 2022

linux-oem-5.14 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

The system could be made to crash if it received specially crafted
network traffic.

Software Description:
- linux-oem-5.14: Linux kernel for OEM systems

Details:

Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter
subsystem in the Linux kernel did not properly handle rules that truncated
packets below the packet header size. When such rules are in place, a
remote attacker could possibly use this to cause a denial of service
(system crash).

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.14.0-1050-oem 5.14.0-1050.57
linux-image-oem-20.04 5.14.0.1050.46
linux-image-oem-20.04b 5.14.0.1050.46
linux-image-oem-20.04c 5.14.0.1050.46
linux-image-oem-20.04d 5.14.0.1050.46

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-5590-1
CVE-2022-36946

Package Information:
https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1050.57
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