T03 · Remote Payload Retrieval and Execution
- Location
scripts/deploy.py:76- Finding
Unverified Remote NodeSource Script Executed as Root
- Content
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None: step("Installing Node.js 22") run(client, "apt-get update -qq", timeout=120) run(client, "apt-get install -y curl git ufw 2>&1 | tail -3", timeout=120) run(client, "curl -fsSL https://deb.nodesource.com/setup_22.x | bash - 2>&1 | tail -3", timeout=60) run(client, "apt-get install -y nodejs 2>&1 | tail -3", timeout=120) ``` ### Technical Analysis The deployment downloads a mutable shell script from `deb.nodesource.com` and immediately pipes it into `bash`. No checksum, signature, pinned artifact version, or content review is performed before execution. The script connects as `root` by default, meaning the downloaded content executes with unrestricted administrative privileges. HTTPS authenticates the current server endpoint but does not protect against upstream compromise, malicious changes to the mutable setup script, certificate-authority compromise, or a compromised delivery infrastructure. Although installing Node.js is necessary for the declared deployment function, executing an unverified remote script as root is not the minimum-risk installation method. ### Attack Path 1. An attacker compromises the NodeSource distribution endpoint, account, DNS path, or content-delivery infrastructure. 2. The attacker replaces or modifies `setup_22.x`. 3. An administrator runs the deployment script against a VPS. 4. The deployment downloads the modified script and sends it directly to `bash`. 5. The payload executes as root and can alter the operating system before package installation continues. ### Impact Assessment Successful exploitation provides arbitrary root code execution on the target VPS. An attacker could install persistent services, steal API keys and gateway tokens, modify SSH c ...[truncated 104 chars]- Remediation
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