CVE-2024-40581: SmartOp Vote Logic Error Causes Fatal Node Halt

SmartOp Vote Path Triggers Fatal Supply Invariant Halt Vulnerability Overview Vulnerability Name: SmartOp Vote Path Triggers Fatal Supply Invariant Halt Vulnerability Type: Logic Error / State Management Error Severity: Critical CVE ID: CVE-2024-40581 Affected Version: 0.1 Fixed Version: None Description A non-council attacker can submit a signed transaction that passes signature, nonce, and balance pre-checks, but fails authorization only after state mutation. Vulnerability Execution Sequence 1. Deduct fees from the attacker's balance 2. Increment nonce 3. Authorization fails (only council members can vote) 4. In external finalization vertex error handling, nonce is incremented again 5. Supply accounting mismatch ( ) triggers a fatal halt The node treats this as an unrecoverable error and exits with code 101. Impact Scope Availability Loss / DoS: The fatal halt triggered by an attacker causes validator processes to exit Consensus Liveness Risk: Multiple nodes may go down due to the same malformed authorization path State Integrity Violation: Fee deduction is applied even after authorization fails Nonce Corruption Effect: Nonce is incremented twice for a single rejected Overall impact is Critical, because unprivileged participants can trigger a fatal node halt via a single crafted transaction path. Remediation Plan Required Logical Fixes 1. Pre-validate operation authorization before state mutation in 2. Ensure only one nonce transition per transaction lifecycle 3. Atomize fee deduction and nonce update with successful operation semantics Specific Patch Strategy Move all operation-level checks (e.g., council membership for vote/proposal operations) ahead of Remove or restrict nonce increment in external error paths when nonce has already been incremented Add regression tests: - Rejected fee-charging (no balance change, no nonce advancement) - Rejected fee-exempt - Invariant preservation after finalizing Security Hardening Add invariant assertion tests around each rejected tx path to ensure no partial state mutation occurs Consider using transactional rollback semantics in the application path POC Code

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CVE-2024-40581: SmartOp Vote Logic Error Causes Fatal Node Halt

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