CVE-2023-5122 in grafana-csv-datasource
Summary
by MITRE • 02/14/2024
Grafana is an open-source platform for monitoring and observability. The CSV datasource plugin is a Grafana Labs maintained plugin for Grafana that allows for retrieving and processing CSV data from a remote endpoint configured by an administrator. If this plugin was configured to send requests to a bare host with no path (e.g. https://www.example.com/ https://www.example.com/` ), requests to an endpoint other than the one configured by the administrator could be triggered by a specially crafted request from any user, resulting in an SSRF vector. AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator
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Analysis
by VulDB Data Team • 10/23/2024
The vulnerability identified as CVE-2023-5122 affects Grafana's CSV datasource plugin, which serves as a critical component for monitoring and observability operations within enterprise environments. This plugin enables administrators to configure remote endpoints for retrieving CSV data, making it an essential tool for data integration and visualization. The flaw manifests when the plugin is configured to communicate with bare hosts lacking specific paths in their URLs, creating a dangerous attack surface that can be exploited by unauthorized users. The vulnerability classification as CVSS score 7.1 indicates a high-severity issue that requires immediate attention from security teams responsible for maintaining Grafana deployments across their organizations.
The technical implementation of this vulnerability stems from improper input validation within the CSV datasource plugin's request handling mechanism. When administrators configure endpoints without specifying explicit paths, the plugin fails to properly sanitize or validate the target URLs, allowing crafted requests to manipulate the actual endpoint being accessed. This behavior creates a server-side request forgery vector where any authenticated user can potentially redirect requests to unintended destinations, bypassing the configured security boundaries. The vulnerability specifically exploits the lack of path validation in URL parsing, enabling attackers to construct malicious requests that can traverse network boundaries and access internal systems that would normally be restricted from external access.
The operational impact of this vulnerability extends beyond simple data exposure, as it can enable attackers to perform reconnaissance activities against internal networks and potentially escalate privileges through information gathering. An attacker could leverage this SSRF capability to probe internal services, access sensitive endpoints, or even facilitate further attacks by discovering network topology information. The CVSS vector AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N indicates that the attack requires no network access, low complexity, only user privileges, and no user interaction, while the scope change vulnerability means that the attack can potentially affect other components within the same security domain. This makes the vulnerability particularly dangerous in environments where Grafana is deployed with elevated privileges or integrated with sensitive monitoring systems.
Organizations should immediately implement mitigations including updating to patched versions of the CSV datasource plugin, implementing strict URL validation for all datasource configurations, and restricting user access to datasource configuration interfaces. Network-level controls such as firewalls and proxy configurations should be deployed to prevent outbound connections to internal services from Grafana instances. The vulnerability aligns with CWE-918, Server-Side Request Forgery, and maps to ATT&CK technique T1071.004 for Application Layer Protocol: DNS, as attackers may use the SSRF capability to establish covert communication channels. Additionally, organizations should conduct comprehensive audits of all datasource configurations to identify potentially vulnerable setups and implement principle of least privilege access controls for user accounts with datasource administration capabilities.