T08 · Insecure Dependencies
Warning
- Location
- SKILL.md:20
- Finding
- Execution of an Unpinned External Bridge Dependency< — complete Steps 1–3 (discover device ID, configure, verify locally), then start the server: ```bash uv run 4-bridge/server.py ``` ``` ### Technical Analysis The skill directs users to obtain setup instructions and executable bridge code from a mutable personal GitHub repository. It then instructs them to execute `4-bridge/server.py` without identifying a reviewed commit, signed release, checksum, or other integrity constraint. Consequently, the effective local executable is not fully represented by the audited skill package and can change after this skill has been reviewed. The external repository was not included in the supplied project, so its current content cannot be classified as malicious based on this audit. The vulnerability is the absence of dependency pinning and integrity verification, not evidence that the referenced repository is presently compromised. ### Attack Path 1. An attacker compromises the upstream repository, its maintainer account, or the distribution path used to access it. 2. The attacker modifies the setup instructions or `4-bridge/server.py`. 3. A user follows the link in `SKILL.md` and obtains the altered upstream content. 4. The user runs `uv run 4-bridge/server.py` as instructed. 5. The substituted code executes with the user's local account privileges and any Bluetooth, filesystem, or network permissions granted to the process. ### Impact Assessment Successful exploitation could provide arbitrary code execution with the privileges of the user running the bridge. The resulting scope could include access to files available to that account, outbound network connectivity, and granted macOS Bluetooth permissions. Additional impact would depend on the ...[truncated 90 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions - Pin the external bridge to a specific reviewed Git commit or immutable, versioned release. - Publish and verify a cryptographic checksum for every downloaded executable file. - Prefer signed releases and document how users must verify the signature before execution. - Vendor the reviewed bridge implementation into the project where licensing and maintenance requirements permit. - Document the exact expected files and dependency versions instead of relying on mutable upstream setup instructions. - Run the bridge with the minimum required operating-system permissions and avoid executing it from an administrator account. - Establish a process for reviewing and deliberately updating the pinned version rather than automatically following upstream changes. ]]>
