Vulnerability · Published Jul 17, 2020 · Assigned by mitre
CVE-2020-15813
High 8.1
In plain English
A high-severity security flaw in the org.graylog:graylog-parent package (Maven). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.graylog:graylog-parent | 3.3.3 | GHSA-3gg9-f3vh-866f |
Affected products (as reported)
References
- https://github.com/Graylog2/graylog2-server/issues/5906 x_refsource_MISC