T08 · Insecure Dependencies
Error
- Location
- SKILL.md:6
- Finding
- Execution of an Unpinned, Mutable npm Package## Vulnerability Details **File Location**: `SKILL.md`, line 6 **Vulnerability Type**: Supply-chain risk through a dynamically resolved third-party dependency **Risk Level**: High ### Vulnerable Code ```yaml allowed-tools: ["Bash(npx awal@latest x402 bazaar *)", "Bash(npx awal@latest x402 details *)"] ``` The package is subsequently invoked as documented: ```bash npx awal@latest x402 bazaar search <query> [-k <n>] [--force-refresh] [--json] npx awal@latest x402 details <url> [--json] ``` ### Technical Analysis The skill authorizes `npx` to execute `awal@latest`. The `latest` tag is mutable and can resolve to a different package version each time the command is invoked. If the requested version is not already available locally, `npx` can retrieve and execute it from the npm registry. The repository contains no lockfile, integrity hash, vendored package, exact version constraint, or package provenance verification. Consequently, the effective executable code can change after this skill has been audited without any corresponding modification to `SKILL.md`. This creates a supply-chain execution boundary in which compromise of the package, its publisher account, the registry distribution path, or a future release can introduce arbitrary code. ### Attack Path 1. An attacker compromises the `awal` package, its publisher credentials, or another part of its release pipeline. 2. The attacker publishes a malicious version and assigns it to the npm `latest` distribution tag. 3. The agent invokes one of the authorized `npx awal@latest` commands. 4. `npx` resolves and potentially downloads the attacker-controlled release. 5. Package installation hooks or executable entry points run with the permissions of the account operating the agent. 6. The malicious package can access files, environment variables, network resources, and other capabilities available to that account. ### Impact Assessment Succe ...[truncated 473 chars]
- Remediation
- ## Remediation Suggestions 1. Replace `awal@latest` with an exact, reviewed version such as `awal@x.y.z`. 2. Commit a lockfile containing resolved versions and integrity hashes. 3. Install dependencies during a controlled setup or build phase rather than downloading them during skill execution. 4. Verify package provenance, publisher identity, registry signatures, and release integrity before upgrades. 5. Disable or tightly control npm lifecycle scripts where they are not required. 6. Run the command in a sandbox with restricted filesystem access, a minimal environment, and limited outbound networking. 7. Establish an explicit dependency-update review process so version changes trigger a new security audit.