T08 · Insecure Dependencies
Warning
- Location
- SKILL.md:34
- Finding
- Unpinned Third-Party Dependency and Package-Provided Installer<![CDATA[ ## Vulnerability Details **File Location**: `SKILL.md`, lines 34–35 **Vulnerability Type**: Unpinned dependency installation and execution of a remotely sourced package **Risk Level**: Medium ### Vulnerable Code ```powershell D:\clawtest\.venv\Scripts\python -m pip install "scrapling[fetchers]" D:\clawtest\.venv\Scripts\scrapling install ``` ### Technical Analysis The installation instructions retrieve `scrapling` and its optional dependencies without specifying reviewed versions or cryptographic hashes. Consequently, the package contents and transitive dependency graph can change after the Skill has been audited. The following command then executes a CLI supplied by the newly downloaded package: ```powershell D:\clawtest\.venv\Scripts\scrapling install ``` This creates supply-chain exposure because the effective code being executed is controlled by package versions resolved at installation time rather than by immutable, reviewed artifacts. The installer may also retrieve browser-related components from external sources. No evidence establishes that the current `scrapling` package is malicious. The vulnerability is the absence of version pinning, integrity verification, and restrictions on installer downloads. ### Attack Path 1. An attacker compromises the package, one of its transitive dependencies, its publishing account, the package index, or an installer download source. 2. The attacker publishes a malicious release or replaces a remotely retrieved component. 3. A user follows the Skill instructions and installs `"scrapling[fetchers]"` without a version or hash constraint. 4. Package resolution selects the compromised artifact. 5. The user invokes the package-provided `scrapling install` command. 6. Malicious package or installer code executes under the account running the commands. ### Impact Assessment Successful exploitation could execute arbitrary code with the privileges of the invoking user. This may permit access to files, envi ...[truncated 464 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions 1. Pin `scrapling` and every transitive dependency to reviewed versions using a lock file. 2. Require cryptographic hashes, such as through `pip install --require-hashes -r requirements.lock`. 3. Generate the lock file from a trusted environment and retain it with the audited Skill. 4. Use a trusted internal package mirror or explicitly configured approved package index. 5. Document all external domains and artifacts contacted by `scrapling install`. 6. Pin and verify browser or runtime components downloaded by the installer. 7. Run installation and scraping under a dedicated, non-administrative account with restricted filesystem and credential access. 8. Where practical, distribute pre-reviewed and integrity-verified artifacts instead of executing an installer whose payload can change remotely. 9. Re-audit and update the lock file through a controlled dependency-update process. ]]>