USN-3419-1: Linux kernel vulnerabilities

18 September 2017

linux, linux-raspi2 vulnerabilities

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

It was discovered that a buffer overflow existed in the Bluetooth stack of the Linux kernel when handling L2CAP configuration responses. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-1000251)

It was discovered that a buffer overflow existed in the Broadcom FullMAC WLAN driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-7541)

Update instructions

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

Ubuntu 17.04
linux-image-4.10.0-1018-raspi2 - 4.10.0-1018.21
linux-image-4.10.0-35-generic - 4.10.0-35.39
linux-image-4.10.0-35-generic-lpae - 4.10.0-35.39
linux-image-4.10.0-35-lowlatency - 4.10.0-35.39
linux-image-generic - 4.10.0.35.35
linux-image-generic-lpae - 4.10.0.35.35
linux-image-lowlatency - 4.10.0.35.35
linux-image-raspi2 - 4.10.0.1018.19

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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