An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure. CREATE(Triage):(User=admin) [CVE-2020-24659|https://nvd.nist.gov/vuln/detail/CVE-2020-24659]
