/*************************************************************************** * payload.cc -- Retrieval of UDP payloads. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2009 Insecure.Com LLC. Nmap is * * also a registered trademark of Insecure.Com LLC. This program is free * * software; you may redistribute and/or modify it under the terms of the * * GNU General Public License as published by the Free Software * * Foundation; Version 2 with the clarifications and exceptions described * * below. This guarantees your right to use, modify, and redistribute * * this software under certain conditions. If you wish to embed Nmap * * technology into proprietary software, we sell alternative licenses * * (contact sales@insecure.com). Dozens of software vendors already * * license Nmap technology such as host discovery, port scanning, OS * * detection, and version detection. * * * * Note that the GPL places important restrictions on "derived works", yet * * it does not provide a detailed definition of that term. To avoid * * misunderstandings, we consider an application to constitute a * * "derivative work" for the purpose of this license if it does any of the * * following: * * o Integrates source code from Nmap * * o Reads or includes Nmap copyrighted data files, such as * * nmap-os-db or nmap-service-probes. * * o Executes Nmap and parses the results (as opposed to typical shell or * * execution-menu apps, which simply display raw Nmap output and so are * * not derivative works.) * * o Integrates/includes/aggregates Nmap into a proprietary executable * * installer, such as those produced by InstallShield. * * o Links to a library or executes a program that does any of the above * * * * The term "Nmap" should be taken to also include any portions or derived * * works of Nmap. This list is not exclusive, but is meant to clarify our * * interpretation of derived works with some common examples. Our * * interpretation applies only to Nmap--we don't speak for other people's * * GPL works. * * * * If you have any questions about the GPL licensing restrictions on using * * Nmap in non-GPL works, we would be happy to help. As mentioned above, * * we also offer alternative license to integrate Nmap into proprietary * * applications and appliances. These contracts have been sold to dozens * * of software vendors, and generally include a perpetual license as well * * as providing for priority support and updates as well as helping to * * fund the continued development of Nmap technology. Please email * * sales@insecure.com for further information. * * * * As a special exception to the GPL terms, Insecure.Com LLC grants * * permission to link the code of this program with any version of the * * OpenSSL library which is distributed under a license identical to that * * listed in the included COPYING.OpenSSL file, and distribute linked * * combinations including the two. You must obey the GNU GPL in all * * respects for all of the code used other than OpenSSL. If you modify * * this file, you may extend this exception to your version of the file, * * but you are not obligated to do so. * * * * If you received these files with a written license agreement or * * contract stating terms other than the terms above, then that * * alternative license agreement takes precedence over these comments. * * * * Source is provided to this software because we believe users have a * * right to know exactly what a program is going to do before they run it. * * This also allows you to audit the software for security holes (none * * have been found so far). * * * * Source code also allows you to port Nmap to new platforms, fix bugs, * * and add new features. You are highly encouraged to send your changes * * to nmap-dev@insecure.org for possible incorporation into the main * * distribution. By sending these changes to Fyodor or one of the * * Insecure.Org development mailing lists, it is assumed that you are * * offering the Nmap Project (Insecure.Com LLC) the unlimited, * * non-exclusive right to reuse, modify, and relicense the code. Nmap * * will always be available Open Source, but this is important because the * * inability to relicense code has caused devastating problems for other * * Free Software projects (such as KDE and NASM). We also occasionally * * relicense the code to third parties as discussed above. If you wish to * * specify special license conditions of your contributions, just say so * * when you send them. * * * * This program is distributed in the hope that it will be useful, but * * WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * * General Public License v2.0 for more details at * * http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file * * included with Nmap. * * * ***************************************************************************/ /* $Id$ */ #include "NmapOps.h" #include "nbase.h" #include "payload.h" extern NmapOps o; /* These payloads are taken from nmap-service-probes. The nmap-service-probes probe strings also happen to be Python strings, so you can convert them to this C strings with this program: s = eval('"' + raw_input().replace('"', '\\"') + '"') print '"' + "".join(c.isalnum() and c or "\\x%02X" % ord(c) for c in s) + '"' These payloads are sent with every host discovery or port scan probe. Only include payloads that are unlikely to crash services, trip IDS alerts, or change state on the server. */ static const char payload_GenericLines[] = "\x0D\x0A\x0D\x0A"; static const char payload_DNSStatusRequest[] = "\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00"; static const char payload_RPCCheck[] = "\x72\xFE\x1D\x13\x00\x00\x00\x00\x00\x00\x00\x02\x00\x01\x86\xA0" "\x00\x01\x97\x7C\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00"; static const char payload_NTPRequest[] = "\xE3\x00\x04\xFA\x00\x01\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\xC5\x4F\x23\x4B\x71\xB1\x52\xF3"; static const char payload_NBTStat[] = "\x80\xF0\x00\x10\x00\x01\x00\x00\x00\x00\x00\x00" "\x20" "CKAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\x00\x00\x21\x00\x01"; static const char payload_SNMPv3GetRequest[] = "\x30\x3A\x02\x01\x03\x30\x0F\x02\x02\x4A\x69\x02\x03\x00\xFF\xE3" "\x04\x01\x04\x02\x01\x03\x04\x10\x30\x0E\x04\x00\x02\x01\x00\x02" "\x01\x00\x04\x00\x04\x00\x04\x00\x30\x12\x04\x00\x04\x00\xA0\x0C" "\x02\x02\x37\xF0\x02\x01\x00\x02\x01\x00\x30\x00"; /* X Display Manager Control Protocol. Version 1, packet type Query (2), no authorization names. We expect a Willing or Unwilling packet in reply. http://cgit.freedesktop.org/xorg/doc/xorg-docs/plain/hardcopy/XDMCP/xdmcp.PS.gz */ static const char payload_xdmcp[] = "\x00\x01\x00\x02\x00\x01\x00"; /* Internet Key Exchange version 1, phase 1 Main Mode. We offer every combination of (DES, 3DES) and (MD5, SHA) in the hope that one of them will be acceptable. Because we use a fixed cookie, we set the association lifetime to 1 second to reduce the chance that repeated probes will look like retransmissions (and therefore not get a response). This payload comes from ike-scan --lifetime 1 --cookie 0011223344556677 --trans=5,2,1,2 --trans=5,1,1,2 --trans=1,2,1,2 --trans=1,1,1,2 We expect another phase 1 message in response. This payload works better with a source port of 500 or a randomized initiator cookie. */ static const char payload_ike[] = /* Initiator cookie 0x0011223344556677, responder cookie 0x0000000000000000. */ "\x00\x11\x22\x33\x44\x55\x66\x77\x00\x00\x00\x00\x00\x00\x00\x00" /* Version 1, Main Mode, flags 0x00, message ID 0x00000000, length 192. */ "\x01\x10\x02\x00\x00\x00\x00\x00\x00\x00\x00\xC0" /* Security Association payload, length 164, IPSEC, IDENTITY. */ "\x00\x00\x00\xA4\x00\x00\x00\x01\x00\x00\x00\x01" /* Proposal 1, length 152, ISAKMP, 4 transforms. */ "\x00\x00\x00\x98\x01\x01\x00\x04" /* Transform 1, 3DES-CBC, SHA, PSK, group 2. */ "\x03\x00\x00\x24\x01\x01\x00\x00\x80\x01\x00\x05\x80\x02\x00\x02" "\x80\x03\x00\x01\x80\x04\x00\x02" "\x80\x0B\x00\x01\x00\x0C\x00\x04\x00\x00\x00\x01" /* Transform 2, 3DES-CBC, MD5, PSK, group 2. */ "\x03\x00\x00\x24\x02\x01\x00\x00\x80\x01\x00\x05\x80\x02\x00\x01" "\x80\x03\x00\x01\x80\x04\x00\x02" "\x80\x0B\x00\x01\x00\x0C\x00\x04\x00\x00\x00\x01" /* Transform 3, DES-CBC, SHA, PSK, group 2. */ "\x03\x00\x00\x24\x03\x01\x00\x00\x80\x01\x00\x01\x80\x02\x00\x02" "\x80\x03\x00\x01\x80\x04\x00\x02" "\x80\x0B\x00\x01\x00\x0C\x00\x04\x00\x00\x00\x01" /* Transform 4, DES-CBC, MD5, PSK, group 2. */ "\x00\x00\x00\x24\x04\x01\x00\x00\x80\x01\x00\x01\x80\x02\x00\x01" "\x80\x03\x00\x01\x80\x04\x00\x02" "\x80\x0B\x00\x01\x00\x0C\x00\x04\x00\x00\x00\x01"; /* Routing Information Protocol version 1. Special-case request for the entire routing table (address family 0, address 0.0.0.0, metric 16). RFC 1058, section 3.4.1. */ static const char payload_rip[] = "\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x10"; /* RADIUS Access-Request. This is a degenerate packet with no username or password; we expect an Access-Reject in response. The Identifier and Request Authenticator are both 0. It was generated by running echo 'User-Password = ""' | radclient auth "" and then manually stripping out the password. Section 2 of the RFC says "A request from a client for which the RADIUS server does not have a shared secret MUST be silently discarded." So this payload only works when the server is configured (or misconfigured) to know the scanning machine as a client. */ static const char payload_radius[] = "\x01\x00\x00\x14" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"; /* NFS version 2, RFC 1831. XID 0x00000000, program 100003 (NFS), procedure NFSPROC_NULL (does nothing, see section 2.2.1), null authentication (see section 9.1). */ static const char payload_nfs[] = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x01\x86\xA3" "\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00"; /* DNS Service Discovery (DNS-SD) service query, as used in Zeroconf. Transaction ID 0x0000, flags 0x0000, 1 question: PTR query for _services._dns-sd._udp.local. If the remote host supports DNS-SD it will send back a list of all its services. This is the same as a packet capture of dns-sd -B _services._dns-sd._udp . See section 9 of http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt. */ static const char payload_dns_sd[] = "\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00" "\x09_services\x07_dns-sd\x04_udp\x05local\x00\x00\x0C\x00\x01"; /* This one trips a Snort rule with SID 2049 ("MS-SQL ping attempt"). static const char payload_Sqlping[] = "\x02"; */ static const char payload_null[] = ""; /* Get a payload appropriate for the given UDP port. If --data-length was used, returns the global random payload. Otherwise, for certain selected ports a payload is returned, and for others a zero-length payload is returned. The length is returned through the length pointer. */ const char *get_udp_payload(u16 dport, size_t *length) { if (o.extra_payload_length > 0) { *length = o.extra_payload_length; return o.extra_payload; } else return udp_port2payload(dport, length); } /* Get a payload appropriate for the given UDP port. For certain selected ports a payload is returned, and for others a zero-length payload is returned. The length is returned through the length pointer. */ const char *udp_port2payload(u16 dport, size_t *length){ const char *payload; #define SET_PAYLOAD(p) do { *length = sizeof(p) - 1; payload = (p); } while (0) switch (dport) { case 7: SET_PAYLOAD(payload_GenericLines); break; case 53: SET_PAYLOAD(payload_DNSStatusRequest); break; case 111: SET_PAYLOAD(payload_RPCCheck); break; case 123: SET_PAYLOAD(payload_NTPRequest); break; case 137: SET_PAYLOAD(payload_NBTStat); break; case 161: SET_PAYLOAD(payload_SNMPv3GetRequest); break; case 177: SET_PAYLOAD(payload_xdmcp); break; case 500: SET_PAYLOAD(payload_ike); break; case 520: SET_PAYLOAD(payload_rip); break; /* case 1434: SET_PAYLOAD(payload_Sqlping); break; */ /* RFC 2865: "The early deployment of RADIUS was done using UDP port number 1645, which conflicts with the "datametrics" service. The officially assigned port number for RADIUS is 1812. */ case 1645: case 1812: SET_PAYLOAD(payload_radius); break; case 2049: SET_PAYLOAD(payload_nfs); break; case 5353: SET_PAYLOAD(payload_dns_sd); break; default: SET_PAYLOAD(payload_null); break; } return payload; }