USN-3674-2: Linux kernel (Trusty HWE) vulnerabilities

11 June 2018

linux-lts-trusty vulnerabilities

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

  • Ubuntu 12.04 ESM

Summary

Several security issues were fixed in the Linux kernel.

Software Description

  • linux-lts-trusty - Linux hardware enablement kernel from Trusty for Precise ESM

Details

USN-3674-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM.

It was discovered that the netfilter subsystem of the Linux kernel did not properly validate ebtables offsets. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-1068)

It was discovered that a NULL pointer dereference existed in the RDS (Reliable Datagram Sockets) protocol implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-7492)

Eyal Itkin discovered that the USB displaylink video adapter driver in the Linux kernel did not properly validate mmap offsets sent from userspace. A local attacker could use this to expose sensitive information (kernel memory) or possibly execute arbitrary code. (CVE-2018-8781)

Xingyuan Lin discovered that a out-of-bounds read existed in the USB Video Class (UVC) driver of the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2017-0627)

Update instructions

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

Ubuntu 12.04 ESM
linux-image-3.13.0-151-generic - 3.13.0-151.201~precise1
linux-image-3.13.0-151-generic-lpae - 3.13.0-151.201~precise1
linux-image-generic-lpae-lts-trusty - 3.13.0.151.142
linux-image-generic-lts-trusty - 3.13.0.151.142

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