[bobdivx]

🛡️ Sentinel: [CRITICAL] Fix command validation bypass

Fix a command injection bypass vulnerability in workdir_cmd.rs.

🚨 Severity: CRITICAL
💡 Vulnerability: The validation relied on substrings checking on the joined command string against BLOCKED_TOKENS like ["rm ", "chmod", "chown"]. Because of the trailing space on rm , it could be bypassed if there was no space, e.g. npm run rm.
🎯 Impact: Attackers could execute dangerous system commands like rm inside the workdir.
🔧 Fix: Added a loop to parse each token individually and exactly match it to blocked binaries rm, chmod, chown, etc. This retains the substring block for multi-word blocks but secures the individual token bypass.
✅ Verification: Covered by the newly added blocks_npm_run_rm test in workdir_cmd.rs.

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PR created automatically by Jules for task 12333977898313133325 started by @bobdivx

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[bobdivx]

Closing as false alarm / overlap with #283 and already-closed #291 / #308. rm is not in ALLOWED_BINS, so npm run rm cannot execute rm as the binary; blocking the string token does not fix a real bypass. Leaving #283 for Mathieu.

[google-labs-jules]

Closing as false alarm / overlap with #283 and already-closed #291 / #308. rm is not in ALLOWED_BINS, so npm run rm cannot execute rm as the binary; blocking the string token does not fix a real bypass. Leaving #283 for Mathieu.

Understood. Acknowledging that this work is obsolete because the rm command bypass was already prevented by the ALLOWED_BINS check. Stopping work on this task.