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).
lists.opensuse.org/opensuse-security-announce/2020-05/msg00016.html
bugs.openldap.org/show_bug.cgi?id=9202
git.openldap.org/openldap/openldap/-/blob/OPENLDAP_REL_ENG_2_4/CHANGES
git.openldap.org/openldap/openldap/-/commit/98464c11df8247d6a11b52e294ba5dd4f0380440
lists.debian.org/debian-lts-announce/2020/05/msg00001.html
security.netapp.com/advisory/ntap-20200511-0003/
support.apple.com/kb/HT211289
usn.ubuntu.com/4352-1/
usn.ubuntu.com/4352-2/
www.debian.org/security/2020/dsa-4666
www.oracle.com/security-alerts/cpuapr2022.html
www.oracle.com/security-alerts/cpuoct2020.html