Vulnerability · CVE-2020-36229
A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.
Published Jan 26, 2021 · catalog updated Oct 14, 2026 · A flaw was discovered
Check if you run it
No confirmed exploitation is on record for CVE-2020-36229. EPSS is 4.30%. Act only if a listed version of A flaw was discovered is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (A flaw was discovered).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 4.30%
- Remediation
- Advisory link
- Affected products
- cpe apple/mac os x · cpe debian/debian linux · cpe openldap/openldap
A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe apple/mac os x10.14.6
- cpe debian/debian linux10.0
- cpe debian/debian linux9.0
- cpe openldap/openldapversion unspecified
How to fix CVE-2020-36229
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2020-36229. EPSS is 4.30%. Act only if a listed version of A flaw was discovered is installed.
Which versions are affected?
Compare what you have installed with apple/mac os x 10.14.6; debian/debian linux 10.0; debian/debian linux 9.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-843: Access of Resource Using Incompatible Type (Type Confusion). EPSS 4.30%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Jan 26, 2021 · NIST NVD
Detected
A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.
Oct 14, 2026 · NIST NVD
Updated
A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.
Sources
- CVE.orgVulnerability recordCVE-2020-36229
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2020-36229
30-day exploitation probability 4.3%
first.org - NIST NVDVulnerability recordCVE-2020-36229
A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.