USN-3420-2: Linux kernel (Xenial HWE) vulnerabilities

Ubuntu Security Notice USN-3420-2

18th September, 2017

linux-lts-xenial vulnerabilities

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

• Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

• linux-lts-xenial
  - Linux hardware enablement kernel from Xenial for Trusty
  
  

Details

USN-3420-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.

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). ()

It was discovered that a buffer overflow existed in the ioctl handling code
in the ISDN subsystem of the Linux kernel. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. ()

Update instructions

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

Ubuntu 14.04 LTS:

To update your system, please follow these instructions:
,

,

CVE-2017-8831