Description
Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.4, the Glances web server exposes a REST API (`/api/4/*`) that is accessible without authentication and allows cross-origin requests from any origin due to a permissive CORS policy (`Access-Control-Allow-Origin: *`). This allows a malicious website to read sensitive system information from a running Glances instance in the victim’s browser, leading to cross-origin data exfiltration. While a previous advisory exists for XML-RPC CORS issues, this report demonstrates that the REST API (`/api/4/*`) is also affected and exposes significantly more sensitive data. Version 4.5.4 patches the issue.
Problem types
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-942: Permissive Cross-domain Policy with Untrusted Domains
CWE-306: Missing Authentication for Critical Function
Product status
References
github.com/...lances/security/advisories/GHSA-gfc2-9qmw-w7vh
github.com/...lances/security/advisories/GHSA-gfc2-9qmw-w7vh
github.com/...ommit/fdfb977b1d91b5e410bc06c4e19f8bedb0005ce9