T08 · Insecure Dependencies
Warning
- Location
- README.md:39
- Finding
- Unpinned Third-Party Dependencies Allow Unreviewed Package Code Execution<![CDATA[ ## Vulnerability Details **File Location**: `README.md`, lines 39-43 **Vulnerability Type**: Unpinned third-party package installation **Risk Level**: Medium ### Vulnerable Code ```bash # Install PDF parsing libraries pip install PyMuPDF pdfplumber pymupdf4llm ``` ### Technical Analysis The installation instructions retrieve three third-party packages without version constraints or integrity hashes. Consequently, the command installs whichever package versions and transitive dependencies are selected by the package index at installation time rather than a fixed, reviewed dependency set. Python packages can execute package-controlled build or installation logic, and their installed modules execute with the privileges of the invoking user when imported. If a named package, its distribution infrastructure, or one of its transitive dependencies is compromised, users following this instruction could install code that was not present during the Skill audit. No evidence indicates that the currently named packages are malicious. The vulnerability is the mutable and unverifiable dependency installation process. ### Attack Path 1. An attacker compromises a listed package, one of its transitive dependencies, or the relevant package-publishing account or distribution channel. 2. The attacker publishes a malicious release that remains compatible with the unconstrained package names. 3. A user follows the documented `pip install` command. 4. `pip` resolves and downloads the attacker-controlled release because no reviewed version or cryptographic hash is required. 5. Malicious build, installation, or imported runtime code executes with the privileges of the user performing the installation or running the Skill. ### Impact Assessment Successful exploitation could allow arbitrary code execution in the installation or runtime environment. The resulting access would generally be limited to the privileges of the invoking user, but could include reading or modi ...[truncated 265 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions 1. Pin every direct dependency to a specifically reviewed version, preferably using exact constraints such as `PackageName==X.Y.Z`. 2. Generate and commit a lock file that also fixes all transitive dependency versions. 3. Record cryptographic hashes and install with hash verification, such as `pip install --require-hashes -r requirements.txt`. 4. Review dependency provenance, package ownership, release history, and transitive dependency changes before updating the lock file. 5. Perform installation inside an isolated virtual environment rather than the global Python environment. 6. Avoid running package installation with administrative or root privileges. 7. Add automated dependency vulnerability and integrity scanning to the release process. ]]>