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CVE-2020-36222

67
FAUCET Score

CVE-2020-36222 is a denial-of-service vulnerability affecting OpenLDAP versions prior to 2.4.57, including instances within Apple and Debian products. This flaw, an assertion failure in slapd's saslAuthzTo validation, carries a high CVSS score of 7.5, indicating it can be exploited remotely with low complexity to cause a complete loss of availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.4.57CPE matchmatch criteria
cpe:2.3:a:openldap:openldap:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
>= 10.14.0, < 10.14.6CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
10.14.6CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
77.74%
Probability of exploitation in next 30 days
EPSS Percentile
99.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.7774 is in the 99th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mediatekpatch availablevia llm_extracted
Fixed in: 9.3.1, 9.2.3, 9.1.6
microsoftpatch availablevia msrc
Product: 16831-16820Fixed in: 2.4.57-2
microsoftpatch availablevia msrc
Product: cm1 openldap 2.4.57-2 on CBL Mariner 1.0Fixed in: 2.4.57-2

Vendor Advisories (3)

mediatekllm-mediatek-5bd731d14163992dHIGH

Third-Party Package Updates in Splunk Enterprise - October 2024

Oct 14, 2024
redhatCVE-2020-36222Moderate

openldap: Assertion failure in slapd in the saslAuthzTo validation

Jan 26, 2021
microsoft2021-Jan/CVE-2020-36222Important

A flaw was discovered in OpenLDAP before 2.4.57 leading to an assertion failure in slapd in the saslAuthzTo validation resulting in denial of service.

Jan 12, 2021

References

bugs.openldap.org / show_bug.cgi
Issue TrackingVendor Advisory
bugs.openldap.org / show_bug.cgi
Issue TrackingVendor Advisory
seclists.org / fulldisclosure/2021/May/64
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2021/May/65
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2021/May/70
Mailing ListThird Party Advisory
git.openldap.org / openldap/openldap/-/commit/02dfc32d658fadc25e4040f78e36592f6e1e1ca0
PatchVendor Advisory
git.openldap.org / openldap/openldap/-/commit/6ed057b5b728b50746c869bcc9c1f85d0bbbf6ed
PatchVendor Advisory
git.openldap.org / openldap/openldap/-/commit/6ed057b5b728b50746c869bcc9c1f85d0bbbf6ed.aa
Broken Link
git.openldap.org / openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57
Release NotesVendor Advisory
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 ListThird Party Advisory
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