7.2 - USN-3581-3

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

- Ubuntu 17.10

Summary:

Several security issues were fixed in the Linux kernel.

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

Details:

Mohamed Ghannam discovered that the IPv4 raw socket implementation in the Linux kernel contained a race condition leading to uninitialized pointer usage. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2017-17712)

ChunYu Wang discovered that a use-after-free vulnerability existed in the SCTP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code, (CVE-2017-15115)

Mohamed Ghannam discovered a use-after-free vulnerability in the DCCP protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-8824)

Update instructions:

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

Ubuntu 17.10:
linux-image-4.13.0-1014-raspi2 4.13.0-1014.15
linux-image-raspi2 4.13.0.1014.12

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://usn.ubuntu.com/usn/usn-3581-3
https://usn.ubuntu.com/usn/usn-3581-1
CVE-2017-15115, CVE-2017-17712, CVE-2017-8824

Package Information:
https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1014.15