wpa, wpasupplicant vulnerability

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

  • Ubuntu 14.04 ESM
  • Ubuntu 12.04 ESM


wpa_supplicant could be made to be disconnected and require reconnection to the network if it received a specially crafted management frame.

Software Description

  • wpa - client support for WPA and WPA2
  • wpasupplicant - client support for WPA and WPA2


USN-4136-1 fixed a vulnerability in wpa_supplicant. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that wpa_supplicant incorrectly handled certain management frames. An 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 - 1:2.1-0ubuntu1.7+esm2
wpasupplicant - 2.1-0ubuntu1.7+esm2
Ubuntu 12.04 ESM
wpasupplicant - 0.7.3-6ubuntu2.5

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.


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