1. Ubuntu Security Notices
  2. USN-4136-1

USN-4136-1: wpa_supplicant and hostapd vulnerability

Publication date

18 September 2019

Overview

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

Releases

Packages

  • wpa - client support for WPA and WPA2

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
19.04 disco hostapd –  2:2.6-21ubuntu3.3
wpasupplicant –  2:2.6-21ubuntu3.3
18.04 bionic hostapd –  2:2.6-15ubuntu2.5
wpasupplicant –  2:2.6-15ubuntu2.5
16.04 xenial hostapd –  1:2.4-0ubuntu6.6
wpasupplicant –  2.4-0ubuntu6.6

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References

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