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Ubuntu Security Notice USN-4757-2
March 04, 2021

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

- Ubuntu 14.04 ESM

Summary:

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

Details:

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 ESM:
  wpasupplicant                   2.1-0ubuntu1.7+esm4

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

References:
  https://ubuntu.com/security/notices/USN-4757-2
  https://ubuntu.com/security/notices/USN-4757-1
  CVE-2021-27803