chai-defender @1.1.0

Summary

On require('chai-defender'), index.js invokes launchDeflectBootstrap() which spawns a detached background node process running lib/caller.js. That process loads lib/initstate.js, which performs an HTTP GET against a hardcoded remote endpoint (http://check-server-state.vercel.app/server/v2) and passes the response body into new Function('require', <response>)(require) , executing attacker-controlled JavaScript with access to Node's require in the installer's process. The package presents itself as a Chai assertions plugin ('Security-focused Chai assertions'), but this fetch-and-exec behavior is unrelated to any assertion functionality. The lib/ directory is padded with files whose names mimic the pino logger project (multistream.js, transport.js, redaction.js, levels.js, symbols.js, worker.js) and reference a non-existent./flowlimit.js module; these files are not wired into index.js and appear to exist to make the package look substantial while the real payload is lib/const.js + lib/initstate.js. Plain HTTP transport additionally exposes the eval channel to in-path payload injection. Any project that requires this package hands remote code execution to whoever controls check-server-state.vercel.app.

Source: amazon-inspector (14f276305fd5e43b60bbfd1048d8792ef7f72734c28cfe533d368c0fc199a0fe)