T08 · Insecure Dependencies
- Location
scripts/auto_write.py:11- Finding
Unpinned Third-Party Dependency Installation Guidance
- Content
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Vulnerability Details
File Location:
scripts/auto_write.py, lines 11-17
Vulnerability Type: Unpinned third-party dependency
Risk Level: LowVulnerable Code
python try: import yaml HAS_YAML = True except ImportError: HAS_YAML = False print("提示: 安装 pyyaml 可获得更好的YAML支持: pip install pyyaml")Technical Analysis
When the
yamlmodule is unavailable, the script recommends installing PyYAML throughpip install pyyaml. The command does not constrain the dependency to a reviewed version, verify package hashes, use a lock file, or require an isolated environment.Consequently, package resolution depends on the mutable state of the configured Python package index at installation time. If the legitimate package, its distribution infrastructure, or the user's package-index configuration is compromised, an attacker-controlled release could be installed. Code from the dependency would subsequently execute when the module is imported.
The script only prints this recommendation and does not automatically execute
pip, which substantially limits exploitability and makes user action necessary.Attack Path
- A user runs
scripts/auto_write.pyin an environment where theyamlmodule is unavailable. - The script displays the unconstrained
pip install pyyamlrecommendation. - The user executes that command using a compromised or attacker-controlled package index, or while a malicious package release is available.
pipresolves and installs the attacker-controlled distribution without version or hash verification.- The malicious package executes code during installation or when
import yamlis performed in a subsequent run.
Impact Assessment
Successful exploitation could execute arbitrary Python code with the privileges of the user performing the installation or running the script. This could permit access to that user's files, environment variables, crede ...[truncated 305 chars]
- A user runs
- Remediation
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Remediation Suggestions
- Declare PyYAML in a maintained dependency file rather than recommending an ad hoc installation command.
- Pin the dependency to a reviewed version or tightly controlled compatible range.
- Generate and verify cryptographic hashes, such as by using a hashed requirements file and:
bash python -m pip install --require-hashes -r requirements.txt - Document installation inside a dedicated virtual environment rather than the system Python environment.
- Use only trusted package indexes and explicitly configure the expected index URL where appropriate.
- Add automated dependency auditing and controlled update procedures so security updates can be reviewed before changing the pinned version.
- Replace the runtime installation prompt with a neutral error that directs users to the project's verified dependency installation documentation.