libssh 'ssh_packet_kexdh_init()' denial of service vulnerability

libssh is a C library that implements the SSH2 protocol. In versions of libssh before 0.6.5, an error in the "sshpacketkexdhinit" function src/server.c when processing SSHMSGNEWKEYS and SSHMSGKEXDHREPLY packets can be exploited to cause a denial of service...