T08 · Insecure Dependencies
Warning
- Location
- SKILL.md:23
- Finding
- Unpinned Third-Party Dependencies Allow Unreviewed Package Versions## Vulnerability Details **File Location**: `SKILL.md`, line 23 **Vulnerability Type**: Unpinned third-party dependencies **Risk Level**: Medium ```bash pip install pymupdf pillow ``` ### Technical Analysis The installation instructions retrieve `pymupdf` and `pillow` without specifying reviewed versions or cryptographic hashes. Consequently, the installed code depends on whichever releases the package index resolves at installation time. This makes builds non-reproducible and prevents integrity verification against an approved dependency set. The package names appear legitimate, and the audit found no evidence that the project deliberately references a malicious package or unsafe package repository. The risk arises because a compromised, malicious, unexpectedly changed, or incompatible future dependency release could be installed without further project changes. Python package installation may execute package-controlled build or installation logic, while imported dependencies execute with the privileges of the user running the extraction scripts. ### Attack Path 1. A user follows the Quick Start instructions in `SKILL.md`. 2. The user runs `pip install pymupdf pillow`. 3. The package manager resolves versions available from its configured package index at that time rather than a reviewed, fixed dependency set. 4. If a resolved release or the configured package source has been compromised, package-controlled installation or runtime code executes locally. 5. The malicious dependency inherits the installing or executing user's access to local files, environment variables, and other resources permitted to that account. ### Impact Assessment Successful exploitation would execute dependency-supplied code with the privileges of the user installing or running the Skill. Depending on that user's permissions, this could permit access to local PDF input data, modification of generated files, reading of other user-accessible files, or arbitrary local code executio ...[truncated 305 chars]
- Remediation
- ## Remediation Suggestions 1. Create a dependency lock or requirements file containing versions that have been reviewed and tested, for example: ```text PyMuPDF==REVIEWED_VERSION Pillow==REVIEWED_VERSION ``` 2. Generate and record cryptographic hashes for every approved distribution, including transitive dependencies where applicable. 3. Require hash verification during installation: ```bash python -m pip install --require-hashes -r requirements.txt ``` 4. Use an approved package index or internally controlled mirror, and explicitly configure the index rather than relying on an unknown local pip configuration. 5. Review dependency advisories regularly and update pins through a controlled testing and approval process. 6. Recommend installation inside a dedicated virtual environment under a non-privileged account. 7. Replace the unpinned command in `SKILL.md` with the reproducible, hash-verified installation procedure.