T08 · Insecure Dependencies
Warning
- Location
- README.md:10
- Finding
- Unpinned Third-Party Dependencies from External Package Sources## Vulnerability Details **File Location**: `README.md:10-11`; duplicated in `SKILL.md:113-114`. The externally installed executable is invoked at `scripts/a_stock_premarket_briefing.py:107-112`. **Vulnerability Type**: Unpinned and insufficiently verified third-party dependencies **Risk Level**: Medium ### Vulnerable Code Installation instructions in `README.md:10-11`: ```bash pip install requests brew install steipete/tap/summarize ``` Equivalent installation instructions in `SKILL.md:113-114`: ```bash pip install requests brew install steipete/tap/summarize ``` The installed `summarize` executable is subsequently trusted and invoked in `scripts/a_stock_premarket_briefing.py:107-112`: ```python result = subprocess.run( ["summarize", url, "--extract-only", "--json"], capture_output=True, text=True, timeout=self.timeout ) ``` ### Technical Analysis The setup documentation directs users to install `requests` without a pinned version or package hash and to install the `summarize` executable from the external Homebrew tap `steipete/tap`, also without pinning it to a reviewed version or source revision. Consequently, the code ultimately executed may differ from the version reviewed during this audit. If a package publisher, custom tap, release artifact, maintainer account, or dependency-resolution channel is compromised, following the documented installation procedure could install altered code. The application later resolves `summarize` through the process environment's executable search path and runs it as a local process. The use of an argument list rather than `shell=True` appropriately prevents direct shell metacharacter injection through the URL argument. The issue is therefore not command injection in the shown call; it is the trust placed in an unpinned and insufficiently verified external executable. ### Attack Path 1. An attacker compromises a dependency publisher, the custom Homebrew tap, a release artifact, or another relevant ...[truncated 1655 chars]
- Remediation
- ## Remediation Suggestions 1. Pin Python dependencies to explicitly reviewed versions rather than allowing unrestricted resolution. 2. Maintain a lock file and require cryptographic hashes, such as a hash-locked `requirements.txt` installed with `pip install --require-hashes -r requirements.txt`. 3. Pin the Homebrew formula or source to a reviewed release or commit where the distribution mechanism permits it. 4. Document the authoritative upstream repository and verify release checksums or signatures before installation. 5. Avoid recommending privileged package installation unless it is strictly necessary. 6. Resolve and validate the expected `summarize` executable path before invocation, and document how users can verify the installed binary's provenance and version. 7. Add automated dependency and supply-chain scanning for lock-file changes and external package updates. 8. Review and update dependency pins deliberately, recording the reviewed versions and integrity metadata in the repository.