OpenSSL Multiple Vulnerabilities

Multiple vulnerabilities have been identified in OpenSSL, which can be exploited by malicious people to disclose potentially sensitive information, manipulate certain data, cause a DoS (Denial of Service), and compromise a vulnerable system.

1. An error when handling SSL/TLS handshakes can be exploited to force the use of weak keying material via a specially crafted handshake and subsequently conduct the Man-in-the-Middle (MitM) attacks.
2. An error within the OpenSSL DTLS client can be exploited to cause a recursion and a crash via a specially crafted DTLS handshake.
3. An error within the OpenSSL DTLS implementation can be exploited to cause a buffer overflow via specially crafted DTLS fragments.
4. A NULL pointer dereference error within the "do_ssl3_write()" function can be exploited to cause a crash. Successful exploitation of this vulnerability requires SSL_MODE_RELEASE_BUFFERS to be enabled.
5. An error within anonymous ECDH ciphersuites can be exploited to cause a DoS within the OpenSSL client.