T03 · Remote Payload Retrieval and Execution
Error
- Location
- SKILL.md:76
- Finding
- Unverified Remote Script Executed with Root Privileges<![CDATA[ ## Vulnerability Details **File Location**: `SKILL.md:76` **Vulnerability Type**: Remote code retrieval and privileged execution **Risk Level**: Critical ### Vulnerable Code ```bash curl -fsSL https://deb.nodesource.com/setup_22.x | sudo -E bash - ``` ### Technical Analysis The installation procedure downloads a shell script from a mutable external URL and pipes it directly into `sudo bash`. There is no checksum comparison, signature verification, version pinning, or opportunity to inspect the retrieved file before execution. The effective payload is therefore controlled by whatever content the remote server supplies at installation time, rather than by the reviewed Skill package. Because the script runs under `sudo`, all downloaded commands execute with root privileges. TLS reduces transport risk but does not protect against compromise of the remote server, its deployment pipeline, its DNS account, or an authorized upstream maintainer. This behavior exceeds the minimum privileges needed merely to download Node.js. Package installation may legitimately require administrative access, but an unverified network response should not be given unrestricted root execution. ### Attack Path 1. An attacker compromises the NodeSource server, publishing pipeline, hosting account, DNS configuration, or another component capable of changing the response. 2. The Agent executes the installation command while following the Skill. 3. `curl` retrieves the attacker-controlled shell program. 4. The pipe sends the program directly to `sudo -E bash`. 5. The program executes as root without local integrity validation. 6. The attacker can alter system files, install additional services, replace executables, collect credentials, or establish arbitrary persistence. ### Impact Assessment Successful exploitation provides root-level code execution on the EC2 instance. The attacker could control the operating system, tamper with OpenClaw, read locally stored API credentia ...[truncated 212 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions - Do not pipe downloaded content directly into a shell. - Configure the repository through explicit, reviewable package-manager operations. - Download repository keys separately and verify their documented fingerprints. - Store signing keys in a dedicated keyring rather than using globally trusted key stores. - Require signed repository metadata and pin an approved Node.js package version. - If a setup artifact must be downloaded, save it locally, verify a pinned cryptographic checksum or signature, inspect it, and only then execute it. - Run all preparation and validation steps without root privileges; elevate only for the specific package-manager operation that requires administrative access. ]]>