openclaw - 💡(How to fix) Fix Security: exec tool bypasses write deny in security executor agents [1 participants]

TL;DR

Implementing an execDeny or execWriteDeny field in the tool policy to explicitly block file-writing commands in exec is likely the most effective fix to prevent bypassing write denials.

Guidance

• Review the current tool policy configuration to understand which operations are allowed or denied, and consider the implications of exec bypassing these restrictions.
• Evaluate the proposed solutions, such as adding an execDeny field, content inspection, or separate exec policy, to determine the best approach for your specific use case.
• Consider the security implications of allowing exec to perform file write operations, even if write and edit are denied, and assess the potential risks to your system.
• Test any implemented solution thoroughly to ensure it effectively prevents exec from bypassing write denials and to identify any potential edge cases or vulnerabilities.

Example

{
  "tools": {
    "allow": ["read", "exec", "process"],
    "deny": ["write", "edit", "apply_patch", "browser", "gateway"],
    "execDeny": ["echo * > *", "powershell -Command Set-Content"]
  }
}

This example illustrates how an execDeny field could be used to block specific file-writing commands in exec.

Notes

The effectiveness of the proposed solutions may depend on the specific requirements and constraints of your system, and may require additional testing and validation to ensure they do not introduce unintended consequences.

Recommendation

Apply a workaround, such as implementing an execDeny field, to prevent exec from bypassing write denials, as this approach can be implemented without requiring significant changes to the underlying system.