T08 · Insecure Dependencies
Warning
- Location
- SKILL.md:52
- Finding
- Unpinned Third-Party Repository and Dependency Execution## Vulnerability Details **File Location**: `SKILL.md`, lines 52–65 **Vulnerability Type**: Supply-chain exposure through mutable external code and unrestricted dependencies **Risk Level**: Medium ### Vulnerable Code ```bash # Clone the project git clone https://github.com/xiaofuqing13/redbooks.git cd redbooks # Create a virtual environment (recommended) python -m venv venv # Windows: venv\Scripts\activate # Linux/Mac: source venv/bin/activate # Install dependencies pip install -r requirements.txt ``` The subsequent documented execution command is: ```bash python crawler_ultimate.py ``` ### Technical Analysis The installation procedure directs users to clone the current state of an external Git repository, install packages from its externally maintained `requirements.txt`, and execute its Python entry point. The instructions do not pin the repository to a reviewed commit or release, verify repository artifacts using cryptographic hashes or signatures, or require hash-locked dependency versions. Neither `requirements.txt` nor `crawler_ultimate.py` is included in the audited project. Consequently, the effective code and dependency set executed by a user may change after this skill has been reviewed. A compromised upstream repository, malicious maintainer update, dependency takeover, or dependency-confusion event could introduce arbitrary installation-time or runtime code. The use of a virtual environment limits Python package contamination but does not sandbox execution. Packages installed in a virtual environment and scripts launched from it normally retain the invoking user's filesystem, network, process, and browser-profile access. ### Attack Path 1. An attacker compromises the referenced upstream repository, one of its maintainers, or a dependency named by its `requirements.txt`. 2. The attacker adds malicious code to `crawler_ultimate.py`, a package installation hook, or an imported dependency. 3. A user follows the skill instructions and clones t ...[truncated 1041 chars]
- Remediation
- ## Remediation Suggestions 1. Pin the external repository to a specific reviewed commit hash rather than cloning and executing the mutable default branch. 2. Record the expected commit identifier and verify it explicitly before installation or execution. 3. Prefer vendoring the reviewed source code into the skill package so the audited implementation is the implementation users execute. 4. Replace an unrestricted `requirements.txt` with a lockfile containing exact versions and cryptographic hashes. Where applicable, install with `pip install --require-hashes`. 5. Pin transitive dependencies as well as direct dependencies and routinely scan them for known vulnerabilities and package ownership changes. 6. Verify release signatures or checksums when upstream provides them. 7. Review package build metadata and installation hooks before installation, and use binary-only packages where appropriate to reduce arbitrary build-script execution. 8. Run the crawler in a dedicated, least-privileged account or isolated container with restricted filesystem and network access. 9. Use a separate browser profile and a dedicated low-privilege platform account so compromise does not expose unrelated sessions or personal browser data. 10. Add an explicit review checkpoint to the documentation before any third-party code or dependencies are installed and executed.