CVE-2020-36224

HIGH 7.5CVE-2020-36224 · Published 26/01/2021 · updated 14/10/2026

In short

CVE-2020-36224 is a HIGH (CVSS 7.5) vulnerability affecting openldap (openldap).
Chance of exploitation in the next 30 days (EPSS): 4.4%, higher than 91.2% of all vulnerabilities.
Fix: update to 2.4.57 or later.

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

Description

A flaw was discovered in OpenLDAP before 2.4.57 leading to an invalid pointer free and slapd crash in the saslAuthzTo processing, resulting in denial of service.

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
git.openldap.org/openldap/openldap/-/commit/554dff1927176579d652f2fe60c90e9abbad4c65 · Patch
git.openldap.org/openldap/openldap/-/commit/5a2017d4e61a6ddc4dcb4415028e0d08eb6bca26 · Patch
git.openldap.org/openldap/openldap/-/commit/c0b61a9486508e5202aa2e0cfb68c9813731b439 · Patch
git.openldap.org/openldap/openldap/-/commit/d169e7958a3e0dc70f59c8374bf8a59833b7bdd8 · 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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