T03 · Remote Payload Retrieval and Execution
Error
- Location
- SKILL.md:31
- Finding
- Root-Level Remote Script Retrieval and Immediate Execution<![CDATA[ ## Vulnerability Details **File Location**: `SKILL.md:31-33` **Vulnerability Type**: Remote payload retrieval and execution **Risk Level**: Critical ### Vulnerable Code ```bash ssh root@<server> curl -fsSL https://deb.nodesource.com/setup_20.x | bash - apt-get install -y nodejs ``` ### Technical Analysis The workflow instructs the operator to establish a root SSH session and pipe an externally retrieved script directly into Bash. The downloaded content is neither inspected nor verified using a pinned checksum or cryptographic signature before execution. HTTPS authenticates the connection under normal conditions but does not guarantee that the upstream script is safe, immutable, or uncompromised. Because the command executes as root, any command returned by the endpoint receives unrestricted control over the target host. Installing Node.js is relevant to the declared setup workflow, but executing a mutable remote script as root exceeds the minimum privilege and verification requirements necessary to accomplish that task. ### Attack Path 1. An attacker compromises the upstream host, publishing pipeline, maintainer account, DNS resolution, or another trusted component in the delivery chain. 2. The attacker modifies the response from `https://deb.nodesource.com/setup_20.x`. 3. An operator follows the Skill and executes the response through `bash`. 4. The payload runs with root privileges. 5. The payload can access credentials, modify packages and services, create accounts, alter SSH configuration, or install persistent malware. ### Impact Assessment Successful exploitation provides arbitrary code execution as root and therefore complete control of the target Linux host. The attacker could access OpenClaw and channel credentials, modify system files, intercept future messages, pivot through available SSH or cloud credentials, and establish persistence. ]]>
- Remediation
- <![CDATA[ ## Remediation Suggestions - Do not pipe network responses directly into a shell. - Prefer a Node.js version supplied by the operating system's authenticated package repositories. - If NodeSource is required, download a versioned installer or repository configuration as a separate file. - Verify an official cryptographic signature and a pinned checksum before execution. - Inspect the downloaded content before running it. - Perform package installation through narrowly scoped privilege escalation rather than conducting the entire workflow in a root shell. - Pin the expected Node.js major and package versions and document a controlled upgrade process. ]]>