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USN-3969-1: wpa_supplicant and hostapd vulnerability

7 May 2019

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



  • wpa - client support for WPA and WPA2


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 19.04
Ubuntu 18.10
Ubuntu 18.04
Ubuntu 16.04

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


Related notices

  • USN-3969-2: wpasupplicant, wpa, wpasupplicant-udeb, wpagui, hostapd