1. Ubuntu Security Notices
  2. USN-4757-1

USN-4757-1: wpa_supplicant and hostapd vulnerability

Publication date

3 March 2021

Overview

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

Releases

Packages

  • wpa - client support for WPA and WPA2

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.

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

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
20.10 groovy wpasupplicant –  2:2.9-1ubuntu8.2
20.04 focal wpasupplicant –  2:2.9-1ubuntu4.3
18.04 bionic wpasupplicant –  2:2.6-15ubuntu2.8
16.04 xenial wpasupplicant –  2.4-0ubuntu6.8

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References

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