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Ubuntu Security Notice USN-3969-2
May 09, 2019

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

- Ubuntu 14.04 ESM

Summary:

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

Details:

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

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

References:
  https://usn.ubuntu.com/usn/usn-3969-2
  https://usn.ubuntu.com/usn/usn-3969-1
  CVE-2019-11555