In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash).
https://git.openldap.org/openldap/openldap/-/blob/OPENLDAP_REL_ENG_2_4/CHANGES
https://bugs.openldap.org/show_bug.cgi?id=9202
https://git.openldap.org/openldap/openldap/-/commit/98464c11df8247d6a11b52e294ba5dd4f0380440
https://www.debian.org/security/2020/dsa-4666
https://lists.debian.org/debian-lts-announce/2020/05/msg00001.html
https://usn.ubuntu.com/4352-2/
https://security.netapp.com/advisory/ntap-20200511-0003/
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00016.html
https://usn.ubuntu.com/4352-1/
https://support.apple.com/kb/HT211289
Source: MITRE
Published: 2020-04-28
Updated: 2022-04-29
Type: CWE-674
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