T08 · Insecure Dependencies
Error
- Location
- SKILL.md:8
- Finding
- Unpinned Third-Party Plugin with Financial Transaction Capabilities## Vulnerability Details **File Location**: `SKILL.md`, lines 8–15 **Vulnerability Type**: Unpinned third-party dependency **Risk Level**: High ### Vulnerable Code ```json "install": [ { "id": "plugin", "kind": "node", "package": "@a2a/openclaw-plugin", "label": "Install A2A Corp plugin", }, ], ``` ### Technical Analysis The skill installs the third-party Node.js package `@a2a/openclaw-plugin` without specifying an exact version or integrity hash. The project contains no package lockfile or plugin source code with which to verify the resolved implementation. Consequently, installation may retrieve a future or compromised package version whose behavior differs from the version originally reviewed. This creates a supply-chain risk because the plugin is advertised as providing financially sensitive operations, including signed USDC payments, funded streaming channels, and automatic payments in response to HTTP 402 requests. The available evidence does not establish that the current package is malicious. The vulnerability is the absence of dependency pinning and verifiable integrity controls around executable third-party code. ### Attack Path 1. An attacker compromises the package publisher account, package distribution channel, or a future release of `@a2a/openclaw-plugin`. 2. The attacker publishes a malicious version under the same package name. 3. A user installs the skill, and the unconstrained dependency resolves to the malicious version. 4. The plugin executes in the agent environment with whatever tool, wallet, network, or payment privileges have been granted to it. 5. The malicious implementation abuses those privileges, such as by redirecting transactions, submitting unauthorized payments, or exposing payment-related information. Successful exploitation depends on compromise or malicious control of the dependency and on the runtime privileges granted to the installed plugin. ### Impact Assessment A malicious resolved depende ...[truncated 697 chars]
- Remediation
- ## Remediation Suggestions 1. Pin `@a2a/openclaw-plugin` to a specific, reviewed version rather than allowing unconstrained resolution. 2. Commit and enforce a package lockfile containing registry-resolved integrity metadata. 3. Verify package publisher ownership, provenance, signatures, and release history before installation. 4. Include or otherwise make available the exact plugin source corresponding to the pinned artifact for security review. 5. Use a trusted registry and enforce integrity or cryptographic digest verification during installation. 6. Run the plugin with least privilege, separating balance queries from transaction-signing authority. 7. Require explicit user confirmation for each payment, channel deposit, and x402 transaction. 8. Validate chain ID, token contract, recipient, service identity, amount, and total fees before signing. 9. Enforce strict per-transaction and cumulative spending limits outside the plugin so that a compromised dependency cannot bypass them. 10. Isolate private keys in a dedicated signer or wallet service that applies independent policy controls and never exposes raw key material to the plugin.