CVE-2020-36221

HIGH 7.5CVE-2020-36221 · Published 26/01/2021 · updated 14/10/2026

Package	Affected versions	Patched versions
openldap openldap	`< 2.4.57`	`2.4.57`

Description

An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schema_init.c serialNumberAndIssuerCheck).

References

seclists.org/fulldisclosure/2021/May/64 · Mailing List
seclists.org/fulldisclosure/2021/May/65 · Mailing List
seclists.org/fulldisclosure/2021/May/70 · Mailing List
bugs.openldap.org/show_bug.cgi · Issue Tracking
bugs.openldap.org/show_bug.cgi · Issue Tracking
git.openldap.org/openldap/openldap/-/commit/38ac838e4150c626bbfa0082b7e2cf3a2bb4df31 · Patch
git.openldap.org/openldap/openldap/-/commit/58c1748e81c843c5b6e61648d2a4d1d82b47e842 · Patch
git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57 · Release Notes
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 · Mailing List
security.netapp.com/advisory/ntap-20210226-0002 · Third Party Advisory
support.apple.com/kb/HT212529 · Third Party Advisory
support.apple.com/kb/HT212530 · Third Party Advisory
support.apple.com/kb/HT212531 · Third Party Advisory
debian.org/security/2021/dsa-4845 · Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-398330.html

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