T08 · Insecure Dependencies
- Location
scripts/scrape.py:11- Finding
Untrusted External Python Module Loaded Through Runtime Path Modification
- Content
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Vulnerability Details
File Location:
scripts/scrape.py, lines 11–14
Vulnerability Type: Unpinned and unaudited external executable dependency
Risk Level: MediumVulnerable Code
python # 添加模板路径 TEMPLATE_DIR = Path(__file__).parent.parent.parent / "scraper-template" / "scripts" sys.path.insert(0, str(TEMPLATE_DIR)) from scrape_base import OpenPlatformScraperTechnical Analysis
The script constructs a path outside the project directory, prepends that path to Python's module search path, and imports
scrape_base. The referencedscraper-template/scripts/scrape_base.pymodule is not included in the audited artifact and therefore could not be reviewed or integrity-verified.Because Python executes top-level module code during import, any code in
scrape_base.pyruns immediately with the privileges of the user invoking the scraper. Prepending the external directory withsys.path.insert(0, ...)gives that location priority during module resolution.The dependency is neither bundled nor pinned to a version or cryptographic hash. Consequently, the effective runtime behavior of the scraper depends on executable code outside the audited project.
Attack Path
- An attacker obtains write access to the expected sibling path
scraper-template/scripts, or compromises the process that populates that dependency. - The attacker creates or modifies
scrape_base.pyand adds malicious top-level Python code. - A user runs
python3 scripts/scrape.py. - The script prepends the attacker-influenced directory to
sys.path. - Python imports
scrape_base.pyand executes its top-level code before the scraper's main workflow begins. - The malicious module operates with the same OS identity and permissions as the user running the Skill.
This path requires the attacker to control or modify the external dependency location; the audited code does not itself download that module.
Impact Assessment
Successful exploitation permits arbi ...[truncated 501 chars]
- An attacker obtains write access to the expected sibling path
- Remediation
View remediation
Remediation Suggestions
- Bundle the required scraper base module inside the project so that all executable code can be audited together.
- Import it through a normal package-relative import rather than modifying
sys.path, for example:
python from .scrape_base import OpenPlatformScraper- If the component must remain a third-party dependency, distribute it through a trusted package repository and pin an exact version and cryptographic hashes in a lock file.
- Verify the dependency's integrity before loading it, particularly in automated build or execution environments.
- Ensure the dependency directory is not writable by untrusted users or lower-privileged processes.
- Run the scraper under a least-privileged account or sandbox with only the filesystem and network access required for scraping the declared Keruyun documentation site.
- Add automated checks that reject imports resolved from locations outside the project or its controlled virtual environment.