CVE-2009-1387

La función dtls1_retrieve_buffered_fragment en ssl/d1_both.c en OpenSSL anteriores a v1.0.0 Beta 2 permite a los atacantes causar una denegación de servicios (puntero NULO desreferenciado y caída de "daemon") a través de un mensaje "handshake" DTLS fuera de secuencia, relativo a "fragment bug".

It was discovered that OpenSSL did not limit the number of DTLS records it would buffer when they arrived with a future epoch. A remote attacker could cause a denial of service via memory resource consumption by sending a large number of crafted requests. It was discovered that OpenSSL did not properly free memory when processing DTLS fragments. A remote attacker could cause a denial of service via memory resource consumption by sending a large number of crafted requests. It was discovered that OpenSSL did not properly handle certain server certificates when processing DTLS packets. A remote DTLS server could cause a denial of service by sending a message containing a specially crafted server certificate. It was discovered that OpenSSL did not properly handle a DTLS ChangeCipherSpec packet when it occurred before ClientHello. A remote attacker could cause a denial of service by sending a specially crafted request. It was discovered that OpenSSL did not properly handle out of sequence DTLS handshake messages. A remote attacker could cause a denial of service by sending a specially crafted request.