Grafana is a multi-platform, open-source analytics and interactive visualization web application. It provides charts, graphs, and alerts for the web when connected to supported data sources.

Directory Traversal Vulnerability
Grafana versions 8.0.0-beta1 through 8.3.0 are vulnerable to directory traversal. A directory traversal attack (also known as path traversal) aims to access files and directories that are stored outside the web root folder by manipulating variables that reference files with dot-dot-slash sequences.

CVE-2021-43798 | Grafana plugins Directory Traversal Vulnerability
Directory traversal vulnerability exists in Grafana allowing access to local files. The vulnerable URL path  . The plugin_id can be the default plugin that comes pre-installed with Grafana, for example:

• alertlist
• annolist
• barchart
• bargauge
• candlestick
• cloudwatch
• dashlist
• Elasticsearch

The vulnerability is due to insufficient sanitization of user input for plugin assets. This that allows the reading of arbitrary files from the filesystem. A remote, unauthenticated attacker can exploit this vulnerability by sending a request to a valid plugin asset directory with dot-dot sections to request arbitrary paths. Successful exploitation results in the disclosure of arbitrary file contents from the target server.

Threat actors can leverage this flaw by crafting an HTTP request to read sensitive files from servers, leading to the disclosure sensitive information . the following exploits disclose sensitive information .

The following versions are vulnerable:

• • Grafana versions 8.0.0-beta1 through 8.3.0

Grafana has patched the vulnerability vendor advisory is available here.

SonicWall Capture Labs provides protection against this threat via following signatures:

• • • IPS 15728:Grafana plugins Directory Traversal

Threat Graph