Graylog before 3.3.3 lacks SSL Certificate Validation for LDAP servers. It allows use of an external user/group database stored in LDAP. The connection configuration allows the usage of unencrypted, SSL- or TLS-secured connections. Unfortunately, the Graylog client code (in all versions that support LDAP) does not implement proper certificate validation (regardless of whether the "Allow self-signed certificates" option is used). Therefore, any attacker with the ability to intercept network traffic between a Graylog server and an LDAP server is able to redirect traffic to a different LDAP server (unnoticed by the Graylog server due to the lack of certificate validation), effectively bypassing Graylog's authentication mechanism.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-07-17T18:05:06

Updated: 2024-08-04T13:30:21.870Z

Reserved: 2020-07-17T00:00:00

Link: CVE-2020-15813

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-07-17T19:15:12.547

Modified: 2024-11-21T05:06:13.953

Link: CVE-2020-15813

cve-icon Redhat

No data.