An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, resulting in denial of service.
seclists.org/fulldisclosure/2021/May/64
seclists.org/fulldisclosure/2021/May/65
seclists.org/fulldisclosure/2021/May/70
bugs.openldap.org/show_bug.cgi?id=9427
git.openldap.org/openldap/openldap/-/commit/91dccd25c347733b365adc74cb07d074512ed5ad
git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57
lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
lists.debian.org/debian-lts-announce/2021/02/msg00005.html
security.netapp.com/advisory/ntap-20210226-0002/
support.apple.com/kb/HT212529
support.apple.com/kb/HT212530
support.apple.com/kb/HT212531
www.debian.org/security/2021/dsa-4845