CVE-2026-5446

# PoC: Check for nonce reuse in ARIA-GCM sessions # This script simulates the observation of static IVs in encrypted packets. import socket import struct def check_aria_nonce_reuse(target_host, target_port): # Connect to the target server supporting ARIA-GCM sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_host, target_port)) # Perform TLS Handshake (Simplified for PoC context) # In a real scenario, use a library like tlslite to force ARIA-GCM cipher suite print("[+] Establishing TLS connection with ARIA-GCM...") # Send two application data records data_1 = b"First record" data_2 = b"Second record" # Capture encrypted records (Simulated) # In the vulnerable version, the explicit IV (first 12 bytes of record) will be identical. record_1_encrypted = b"\x00" * 12 + b"...ciphertext1..." # IV is zeros record_2_encrypted = b"\x00" * 12 + b"...ciphertext2..." # IV is still zeros iv_1 = record_1_encrypted[:12] iv_2 = record_2_encrypted[:12] if iv_1 == iv_2: print("[!!!] VULNERABILITY CONFIRMED: Nonce (IV) reuse detected!") print(f"IV 1: {iv_1.hex()}") print(f"IV 2: {iv_2.hex()}") print("An attacker can use these identical nonces to recover authentication tags and decrypt traffic.") else: print("[-] IVs are unique. Target might be patched or not using vulnerable config.") sock.close() # Usage # check_aria_nonce_reuse("example.com", 443)

{"cve": {"id": "CVE-2026-5446", "sourceIdentifier": "[email protected]", "published": "2026-04-09T21:16:12.980", "lastModified": "2026-04-29T17:25:21.783", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In wolfSSL, ARIA-GCM cipher suites used in TLS 1.2 and DTLS 1.2 reuse an identical 12-byte GCM nonce for every application-data record. Because wc_AriaEncrypt is stateless and passes the caller-supplied IV verbatim to the MagicCrypto SDK with no internal counter, and because the explicit IV is zero-initialized at session setup and never incremented in non-FIPS builds. This vulnerability affects wolfSSL builds configured with --enable-aria and the proprietary MagicCrypto SDK (a non-default, opt-in configuration required for Korean regulatory deployments). AES-GCM is not affected because wc_AesGcmEncrypt_ex maintains an internal invocation counter independently of the call-site guard."}], "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:H/VI:L/VA:N/SC:N/SI:N/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": 6.0, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "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:H/I:L/A:N", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 4.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-323"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2.1", "versionEndExcluding": "5.9.1", "matchCriteriaId": "02231B1B-BBC3-4B75-B362-7E2678209E23"}]}]}], "references": [{"url": "https://github.com/wolfSSL/wolfssl/pull/10111", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}]}}