Description
Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, the Glances REST API web server ships with a default CORS configuration that sets `allow_origins=["*"]` combined with `allow_credentials=True`. When both of these options are enabled together, Starlette's `CORSMiddleware` reflects the requesting `Origin` header value in the `Access-Control-Allow-Origin` response header instead of returning the literal `*` wildcard. This effectively grants any website the ability to make credentialed cross-origin API requests to the Glances server, enabling cross-site data theft of system monitoring information, configuration secrets, and command line arguments from any user who has an active browser session with a Glances instance. Version 4.5.2 fixes the issue.
Problem types
CWE-942: Permissive Cross-domain Policy with Untrusted Domains
Product status
References
github.com/...lances/security/advisories/GHSA-9jfm-9rc6-2hfq
github.com/...ommit/4465169b71d93991f1e49740fe02428291099832
github.com/nicolargo/glances/releases/tag/v4.5.2