T08 · Insecure Dependencies
Warning
- Location
- SKILL.md:18
- Finding
- Unpinned Third-Party Package Retrieval and Execution## Vulnerability Details **File Location**: `SKILL.md`, lines 18–27 **Vulnerability Type**: Unpinned and unaudited runtime dependency execution **Risk Level**: Medium **Vulnerable Code:** ```bash ## Quick Start # Wave animation (default 16 frames) uv run --with sprite-animator sprite-animator -i photo.png -o sprite.gif -a wave # Bounce animation with larger sprites uv run --with sprite-animator sprite-animator -i avatar.png -o bounce.gif -a bounce -s 256 # Keep the raw sprite sheet and individual frames uv run --with sprite-animator sprite-animator -i pet.jpg -o dance.gif -a dance --keep-sheet --keep-frames ``` ### Technical Analysis The documented commands instruct users to resolve and execute the third-party `sprite-animator` package through `uv` without specifying an exact version or cryptographic hashes. The audited project contains no implementation source, dependency lockfile, integrity metadata, or vendored package against which the executed behavior can be verified. Consequently, the code executed by these commands may change after the Skill has been reviewed. A compromised package publisher account, malicious future release, or package-registry supply-chain incident could introduce arbitrary installation-time or runtime behavior. The package process may inherit the user's environment, including the required `GEMINI_API_KEY`, and receive access to the input images and output paths supplied on the command line. This finding establishes an insecure dependency boundary; it does not establish that the current external package is malicious. ### Attack Path 1. An attacker compromises the package publisher, package registry, or a future release of the unpinned `sprite-animator` dependency. 2. The attacker publishes a modified package containing malicious installation or entry-point code. 3. A user follows one of the documented `uv run --with sprite-animator` commands. 4. `uv` resolves and retrieves the packa ...[truncated 970 chars]
- Remediation
- ## Remediation Suggestions 1. Pin `sprite-animator` to an exact, reviewed version rather than allowing unconstrained resolution. 2. Maintain a committed lockfile containing exact transitive dependency versions and cryptographic hashes. 3. Configure `uv` to retrieve packages only from an explicitly trusted registry and require integrity verification where supported. 4. Review the package source, build configuration, installation hooks, entry point, and transitive dependencies before approving upgrades. 5. Prefer bundling auditable implementation source with the Skill when practical so reviewed behavior cannot change independently. 6. Run the dependency with least privilege in an isolated environment. Expose only the necessary input and output paths and restrict unnecessary network and filesystem access. 7. Provide `GEMINI_API_KEY` only to the process that requires it, use a narrowly scoped credential where supported, and rotate the credential if dependency compromise is suspected. 8. Adopt an explicit dependency-update process in which version and hash changes require security review before deployment.