The WNM Sleep Mode code in wpa_supplicant 2.x before 2.6 does not properly ignore key data in response frames when management frame protection (MFP) was not negotiated, which allows remote attackers to inject arbitrary broadcast or multicast packets or cause a denial of service (ignored packets) via a WNM Sleep Mode response.
http://source.android.com/security/bulletin/2016-01-01.html
http://w1.fi/security/2015-6/wpa_supplicant-unauthorized-wnm-sleep-mode-gtk-control.txt
http://www.debian.org/security/2015/dsa-3397
http://www.openwall.com/lists/oss-security/2015/11/10/9
http://www.securityfocus.com/bid/77541
Source: MITRE
Published: 2016-01-06
Updated: 2018-02-22
Type: CWE-200
Base Score: 3.3
Vector: AV:A/AC:L/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 6.5
Severity: LOW
Base Score: 4.3
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Impact Score: 1.4
Exploitability Score: 2.8
Severity: MEDIUM