CVE-2020-15813

HighCVSS 8.1/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-295

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/Graylog2/graylog2-server/issues/5906Third Party Advisory
https://github.com/Graylog2/graylog2-server/issues/5906Third Party Advisory

Timeline

Published: Jul 17, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

CVE-2020-158168.8In Western Digital WD Discovery before 4.0.251.0, a malicious application running with standard user permissions could potentially execute c CVE-2020-158178.8In JetBrains YouTrack before 2020.1.1331, an external user could execute commands against arbitrary issues.CVE-2020-158185.3In JetBrains YouTrack before 2020.2.8527, the subtasks workflow could disclose issue existence.CVE-2020-158195.3JetBrains YouTrack before 2020.2.10643 was vulnerable to SSRF that allowed scanning internal ports.CVE-2020-15827.8A remote code execution vulnerability exists in Microsoft Access software when the software fails to properly handle objects in memory. An a CVE-2020-158205.3In JetBrains YouTrack before 2020.2.6881, the markdown parser could disclose hidden file existence.CVE-2020-158216.5In JetBrains YouTrack before 2020.2.6881, a user without permission is able to create an article draft.CVE-2020-158227.3In JetBrains YouTrack before 2020.2.10514, SSRF is possible because URL filtering can be escaped.CVE-2020-158237.5JetBrains YouTrack before 2020.2.8873 is vulnerable to SSRF in the Workflow component.CVE-2020-158248.8In JetBrains Kotlin from 1.4-M1 to 1.4-RC (as Kotlin 1.3.7x is not affected by the issue. Fixed version is 1.4.0) there is a script-cache pr CVE-2020-158258.8In JetBrains TeamCity before 2020.1, users with the Modify Group permission can elevate other users' privileges.CVE-2020-158264.3In JetBrains TeamCity before 2020.1, users are able to assign more permissions than they have.