wolfSSL 5.3.0 Denial Of Service

In wolfSSL version 5.3.0, man-in-the-middle attackers or a malicious server can crash TLS 1.2 clients during a handshake. If an attacker injects a large ticket (above 256 bytes) into a NewSessionTicket message in a TLS 1.2 handshake, and the client has a non-empty session cache, the session cache frees a pointer which points to non-allocated memory, causing the client to crash with a “free(): invalid pointer”. Note: It is likely that this is also exploitable in TLS 1.3 handshakes between …

attackers cache client clients crash denial of service free handshake large malicious man-in-the-middle memory message non server service session tls tls 1.2 version wolfssl