Home/CVE/A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch-bv_len miscalculation and slapd crash in the saslAuth
CVE

CVE-2020-36226

A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch-bv_len miscalculation and slapd crash in the saslAuth

A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch-bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.

HIGH · CVSS 7.5 EPSS 0.01074
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
▤

Affected Products & Versions

5
openldap< 2.4.57
debian linuxall versions
apple mac os x>= 10.14.0 and < 10.14.6
apple mac os xall versions
apple macos>= 11.1 and < 11.4
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Jan 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

10
usnUSN-7698-1
siemens-csafSSA-398330
suse-csafSUSE-SU-2021:14700-1
suse-csafopenSUSE-SU-2021:0408-1
suse-csafSUSE-SU-2021:0723-1
🔗

References & Sources

18
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2021/May/64Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/May/65Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/May/70Mailing ListThird Party Advisory
https://bugs.openldap.org/show_bug.cgi?id=9413Issue TrackingVendor Advisory
https://git.openldap.org/openldap/openldap/-/commit/554dff1927176579d652f2fe60c90e9abbad4c65PatchVendor Advisory
https://git.openldap.org/openldap/openldap/-/commit/5a2017d4e61a6ddc4dcb4415028e0d08eb6bca26PatchVendor Advisory
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