wolfSSL Session Resumption Denial Of Service

wolfSSL versions prior to 5.5.0 suffer from a denial of service condition related to session resumption. When a TLS 1.3 client connects to a wolfSSL server and SSL_clear is called on its session, the server crashes with a segmentation fault. The bug occurs after a client performs a handshake against a wolfSSL server and then closes the connection. If the server reuses the previous session structure (struct WOLFSSL) by calling wolfSSL_clear(WOLFSSL* ssl) on it, the next received Client Hello, which …

bug called client crashes denial of service handshake segmentation server service session ssl tls tls 1.3 wolfssl