Description
Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.3, the Glances XML-RPC server (activated with glances -s or glances --server) sends Access-Control-Allow-Origin: * on every HTTP response. Because the XML-RPC handler does not validate the Content-Type header, an attacker-controlled webpage can issue a CORS "simple request" (POST with Content-Type: text/plain) containing a valid XML-RPC payload. The browser sends the request without a preflight check, the server processes the XML body and returns the full system monitoring dataset, and the wildcard CORS header lets the attacker's JavaScript read the response. The result is complete exfiltration of hostname, OS version, IP addresses, CPU/memory/disk/network stats, and the full process list including command lines (which often contain tokens, passwords, or internal paths). This issue has been patched in version 4.5.3.
Problem types
CWE-942: Permissive Cross-domain Policy with Untrusted Domains
Product status
References
github.com/...lances/security/advisories/GHSA-7p93-6934-f4q7
github.com/...ommit/dcb39c3f12b2a1eec708c58d22d7a1d62bdf5fa1
github.com/nicolargo/glances/releases/tag/v4.5.3