What is CVE-2020-15813?

CVE-2020-15813 is a high-severity vulnerability in Graylog, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2020-07-17.

How severe is CVE-2020-15813?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Graylog

CVE-2020-15813

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.

Vulnerability class: Improper Certificate Validation

EPSS: 0.008 (52.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Graylog
N/a — versions n/a

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-15813?: CVE-2020-15813 is a high-severity vulnerability in Graylog, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2020-07-17.
How severe is CVE-2020-15813?: High severity. CVSS v3 base score is 8.1 out of 10.