[USN-4757-1] wpa_supplicant and hostapd vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Wed Mar 3 12:50:14 UTC 2021

Ubuntu Security Notice USN-4757-1
March 03, 2021

wpa vulnerability

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS


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

Software Description:
- 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:
  wpasupplicant                   2:2.9-1ubuntu8.2

Ubuntu 20.04 LTS:
  wpasupplicant                   2:2.9-1ubuntu4.3

Ubuntu 18.04 LTS:
  wpasupplicant                   2:2.6-15ubuntu2.8

Ubuntu 16.04 LTS:
  wpasupplicant                   2.4-0ubuntu6.8

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


Package Information:

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