USN-3969-2: wpa_supplicant and hostapd vulnerability

9 May 2019

wpa vulnerability

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

  • Ubuntu 14.04 ESM


wpa_supplicant and hostapd could be made to crash if they received specially crafted network traffic.

Software Description

  • wpa - client support for WPA and WPA2


USN-3969-1 fixed a vulnerability in wpa_supplicant and hostapd. This update provides the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that wpa_supplicant and hostapd incorrectly handled unexpected fragments when using EAP-pwd. A remote attacker could possibly use this issue to cause a denial of service.

Update instructions

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

Ubuntu 14.04 ESM
hostapd - 2.1-0ubuntu1.7+esm1
wpasupplicant - 2.1-0ubuntu1.7+esm1

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.