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USN-4757-1: wpa_supplicant and hostapd vulnerability

3 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


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 20.10
Ubuntu 20.04
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-4757-2: wpasupplicant, wpagui, hostapd, wpa, wpasupplicant-udeb