CVE-2023-1387 : Vulnerability Insights and Analysis

This CVE-2023-1387 pertains to a vulnerability identified in Grafana, an open-source platform designed for monitoring and observability. The vulnerability lies in the authentication mechanism that could potentially be exploited by attackers to gain unauthorized access.

Understanding CVE-2023-1387

This section will delve into the nature of CVE-2023-1387 and its implications.

What is CVE-2023-1387?

The vulnerability in question arises from a feature introduced in the 9.1 branch of Grafana. The platform allows the search for a JSON Web Token (JWT) in the URL query parameter

auth_token

for authentication purposes. Enabling the "url_login" configuration option, although disabled by default, enables the potential transmission of a JWT to data sources. If an attacker can access the data source, the leaked token could be leveraged to authenticate into Grafana.

The Impact of CVE-2023-1387

The vulnerability identified as CVE-2023-1387 is classified under CAPEC-116. It has a CVSSv3 base score of 4.2, categorizing it as having a medium severity level. The confidentiality impact is deemed high, and the attack complexity is labeled as high as well.

Technical Details of CVE-2023-1387

This section will provide technical insights into the vulnerability CVE-2023-1387.

Vulnerability Description

The vulnerability allows attackers to potentially access and abuse JWT tokens transmitted to data sources, leading to unauthorized access to Grafana.

Affected Systems and Versions

The affected products include Grafana and Grafana Enterprise versions less than 9.2.17, 9.3.13, and 9.5.0.

Exploitation Mechanism

The exploitation involves intercepting JWT tokens sent to data sources, enabling malicious actors to authenticate to Grafana.

Mitigation and Prevention

To safeguard systems from the risks associated with CVE-2023-1387, it is crucial to implement appropriate mitigation measures.

Immediate Steps to Take

Disable the "url_login" configuration option in Grafana to prevent the transmission of JWT tokens to data sources.
Regularly monitor and audit access to data sources to detect any unauthorized usage of leaked tokens.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and address potential vulnerabilities.
Implement strong access controls and authentication mechanisms to restrict unauthorized access.

Patching and Updates

Ensure that Grafana and Grafana Enterprise are updated to versions 9.2.17, 9.3.13, or 9.5.0 to mitigate the vulnerability CVE-2023-1387 effectively. Regularly check for security advisories from Grafana to stay informed about any additional security patches or updates.