CVE-2017-3730 – Bad (EC)DHE parameters cause a client crash

https://notcve.org/view.php?id=CVE-2017-3730

In OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack. En OpenSSL versión 1.1.0 anterior a 1.1.0d, si un servidor malicioso suministra parámetros incorrectos para un intercambio de claves DHE o ECDHE, entonces esto puede resultar en que el cliente intente desreferenciar un puntero NULL que conduce a un bloqueo del cliente. Esto podría ser explotado en un ataque de denegación de servicio. • https://www.exploit-db.com/exploits/41192 https://github.com/guidovranken/CVE-2017-3730 http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html http://www.securityfocus.com/bid/95812 http://www.securitytracker.com/id/1037717 https://github.com/openssl/openssl/commit/efbe126e3ebb9123ac9d058aa2bb044261342aaa https://security.gentoo.org/glsa/201702-07 https://support.hpe.com/hpsc/doc/public/display?docLocale=en • CWE-476: NULL Pointer Dereference •