USN-4757-2: wpa_supplicant and hostapd vulnerability

04 March 2021

wpa_supplicant could be made to crash or run programs if it received specially crafted network traffic.



  • wpa - client support for WPA and WPA2


USN-4757-1 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 did not properly handle P2P
(Wi-Fi Direct) provision discovery requests in some situations. A
physically proximate attacker could use this to cause a denial of service
or possibly execute arbitrary code.

Update instructions

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

Ubuntu 14.04

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


Related notices

  • USN-4757-1: hostapd, wpasupplicant, wpa, wpasupplicant-udeb, wpagui