CVE-2020-36221
HIGH severity · CVSS 7.5 · CWE-191
7.5CVSS HIGH
Summary
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).
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)85%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.openldap.org/openldap/openldap/-/commit/38ac838e4150c626bbfa0082b7e2cf3a2bb4df31 ↗
Additional information
- NVD record
- https://git.openldap.org/openldap/openldap/-/commit/38ac838e4150c626bbfa0082b7e2cf3a2bb4df31Patch
- https://git.openldap.org/openldap/openldap/-/commit/58c1748e81c843c5b6e61648d2a4d1d82b47e842Patch
- https://bugs.openldap.org/show_bug.cgi?id=9404Advisory
- https://bugs.openldap.org/show_bug.cgi?id=9424Advisory
- https://git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57Advisory
- http://seclists.org/fulldisclosure/2021/May/64Advisory
- http://seclists.org/fulldisclosure/2021/May/65Advisory
- http://seclists.org/fulldisclosure/2021/May/70Advisory