T08 · Insecure Dependencies
Note
- Location
- scripts/render_motion_gif.py:17
- Finding
- Unpinned Third-Party Dependency Installation Guidance<![CDATA[ ## Vulnerability Details **File Location**: `scripts/render_motion_gif.py:17-19` **Vulnerability Type**: Unpinned third-party Python dependency **Risk Level**: Low ```python try: from PIL import Image, ImageChops except ImportError as exc: # pragma: no cover - dependency error path raise SystemExit("Pillow is required: python3 -m pip install Pillow") from exc ``` ### Technical Analysis When Pillow is unavailable, the script directs the user to install it without specifying a version, hash, reviewed package index, or lockfile. The command therefore resolves whichever Pillow release and distribution artifact the configured Python package index currently provides. Pillow is legitimately required for the declared GIF-rendering functionality, and the script does not automatically execute the installation command. Nevertheless, this guidance creates an avoidable supply-chain trust dependency and does not provide reproducible installation behavior. The resulting version may differ across runs and could be compromised, incompatible, or affected by a newly introduced vulnerability. No evidence indicates that Pillow itself or the referenced package source is malicious. Exploitation consequently depends on an upstream package, package-index, network, or local pip-configuration compromise. ### Attack Path 1. A user opts into GIF generation and invokes `scripts/render_motion_gif.py` on a system without Pillow. 2. The import fails, and the script displays `python3 -m pip install Pillow`. 3. The user manually runs the suggested command. 4. Pip resolves the dependency using the user's configured package indexes and selects an unconstrained release. 5. If the selected artifact, index response, or dependency chain has been compromised, attacker-controlled installation or runtime code executes. 6. The malicious code runs with the privileges of the user or environment performing the installation and can access resources available to that account. ### I ...[truncated 557 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions 1. Add a reviewed dependency manifest that pins Pillow to an exact supported version. 2. For reproducible installations, provide hashes for every permitted distribution artifact and require hash verification: ```bash python3 -m pip install --require-hashes -r requirements.txt ``` 3. Generate and review the hashes from trusted release artifacts, and update them through a controlled dependency-review process. 4. If multiple Python versions or platforms must be supported, maintain a lockfile or constraints file covering those environments rather than recommending an unconstrained installation. 5. Replace the current error message with a reference to the repository-controlled dependency file: ```python raise SystemExit( "Pillow is required. Install reviewed dependencies with: " "python3 -m pip install --require-hashes -r requirements.txt" ) from exc ``` 6. Document the expected package index and advise users to inspect pip configuration when operating in sensitive environments. 7. Run dependency vulnerability and provenance checks during release preparation and CI. ]]>