N/A - USN-3384-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04

Summary:

Several security issues were fixed in the Linux kernel.

Software Description: - linux: Linux kernel - linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload (UFO) code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. (CVE-2017-1000112)

Andrey Konovalov discovered a race condition in AF_PACKET socket option handling code in the Linux kernel. A local unprivileged attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2017-1000111)

Update instructions:

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

Ubuntu 17.04:
linux-image-4.10.0-1015-raspi2 4.10.0-1015.18
linux-image-4.10.0-32-generic 4.10.0-32.36
linux-image-4.10.0-32-generic-lpae 4.10.0-32.36
linux-image-4.10.0-32-lowlatency 4.10.0-32.36
linux-image-generic 4.10.0.32.32
linux-image-generic-lpae 4.10.0.32.32
linux-image-lowlatency 4.10.0.32.32
linux-image-raspi2 4.10.0.1015.16

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://www.ubuntu.com/usn/usn-3384-1
CVE-2017-1000111, CVE-2017-1000112

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.10.0-32.36
https://launchpad.net/ubuntu/+source/linux-raspi2/4.10.0-1015.18