contrib/slapd-modules/nops/nops.c in OpenLDAP through 2.4.45, when both the nops module and the memberof overlay are enabled, attempts to free a buffer that was allocated on the stack, which allows remote attackers to cause a denial of service (slapd crash) via a member MODDN operation.
http://www.openldap.org/its/index.cgi/Incoming?id=8759
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html
https://kc.mcafee.com/corporate/index?page=content&id=SB10365
Source: MITRE
Published: 2017-12-18
Updated: 2022-06-13
Type: CWE-119
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
Severity: HIGH