T09 · Insecure Skill Coding Practices
- Location
references/runtime-troubleshooting.md:82- Finding
Unsafe Direct Patching of the Active Gateway Runtime Bundle
- Content
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Vulnerability Details
File Location:
references/runtime-troubleshooting.md, lines 82-88
Vulnerability Type:T09: Insecure Skill Coding Practices
Risk Level: MediumVulnerable Documentation Snippet:
markdown ### If rebuild output is not taking effect If the correct source exists but the deployed runtime still serves stale code: 1. locate the exact runtime bundle used by the gateway 2. patch the active bundle if necessary 3. restart the gateway 4. verify by saving again and re-reading the registry fileTechnical Analysis
The troubleshooting guide explicitly authorizes an agent to patch the executable runtime bundle used by the live gateway. Directly modifying a deployed bundle bypasses the normal source review, reproducible build, testing, and artifact-integrity controls that help ensure deployed code corresponds to reviewed source code.
The instruction does not require the agent to:
- create and validate a backup before modification;
- confirm the identity and integrity of the active artifact;
- constrain modifications to the affected team-normalization logic;
- review or test the resulting bundle before activation;
- record the deployed modification in source control;
- define an automatic rollback procedure.
Restarting the gateway immediately after patching activates the unreviewed runtime change. This can result in source/runtime drift and makes later auditing difficult. The documentation does not itself contain malicious code, and exploitation remains limited by the filesystem and service-management permissions already available to the executing agent.
Attack Path
- An agent encounters a Teams save issue and follows the runtime troubleshooting guide.
- The agent locates the bundle currently executed by the gateway.
- The agent edits that active bundle directly instead of rebuilding from reviewed source.
- A malicious, compromised, or erroneous modificatio ...[truncated 924 chars]
- Remediation
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Remediation Suggestions
- Remove the recommendation to patch the active runtime bundle directly.
- Require all fixes to be made in version-controlled source files and reviewed before deployment.
- Produce the runtime artifact through a documented, reproducible build process.
- Verify the generated artifact with a cryptographic checksum or signature before deployment.
- Deploy through an atomic replacement process rather than editing an artifact in place.
- Back up the previous verified artifact and define a tested rollback procedure.
- Run targeted tests confirming that
parentIdis preserved before restarting the production gateway. - Use least-privilege deployment credentials and separate source-editing permissions from production deployment permissions.
- After deployment, verify that the active artifact hash matches the approved build output and record the deployment for auditability.
- If emergency runtime modification is unavoidable, require explicit operator approval, a narrowly scoped patch, integrity validation, complete change logging, and immediate reconciliation back into reviewed source.
