From 0d47952611198ef6b1163f366dc03922d20b1475 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 09:42:04 +0200 Subject: Adding upstream version 7.94+git20230807.3be01efb1+dfsg. Signed-off-by: Daniel Baumann --- scripts/imap-ntlm-info.nse | 176 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 176 insertions(+) create mode 100644 scripts/imap-ntlm-info.nse (limited to 'scripts/imap-ntlm-info.nse') diff --git a/scripts/imap-ntlm-info.nse b/scripts/imap-ntlm-info.nse new file mode 100644 index 0000000..60a29a8 --- /dev/null +++ b/scripts/imap-ntlm-info.nse @@ -0,0 +1,176 @@ +local comm = require "comm" +local os = require "os" +local datetime = require "datetime" +local shortport = require "shortport" +local sslcert = require "sslcert" +local stdnse = require "stdnse" +local base64 = require "base64" +local smbauth = require "smbauth" +local string = require "string" + + +description = [[ +This script enumerates information from remote IMAP services with NTLM +authentication enabled. + +Sending an IMAP NTLM authentication request with null credentials will +cause the remote service to respond with a NTLMSSP message disclosing +information to include NetBIOS, DNS, and OS build version. +]] + + +--- +-- @usage +-- nmap -p 143,993 --script imap-ntlm-info +-- +-- @output +-- 143/tcp open imap +-- | imap-ntlm-info: +-- | Target_Name: ACTIVEIMAP +-- | NetBIOS_Domain_Name: ACTIVEIMAP +-- | NetBIOS_Computer_Name: IMAP-TEST2 +-- | DNS_Domain_Name: somedomain.com +-- | DNS_Computer_Name: imap-test2.somedomain.com +-- | DNS_Tree_Name: somedomain.com +-- |_ Product_Version: 6.1.7601 +-- +--@xmloutput +-- ACTIVEIMAP +-- ACTIVEIMAP +-- IMAP-TEST2 +-- somedomain.com +-- imap-test2.somedomain.com +-- somedomain.com +-- 6.1.7601 + + +author = "Justin Cacak" +license = "Same as Nmap--See https://nmap.org/book/man-legal.html" +categories = {"default", "discovery", "safe"} + + +local ntlm_auth_blob = base64.enc( select(2, + smbauth.get_security_blob(nil, nil, nil, nil, nil, nil, nil, + 0x00000001 + -- Negotiate Unicode + 0x00000002 + -- Negotiate OEM strings + 0x00000004 + -- Request Target + 0x00000200 + -- Negotiate NTLM + 0x00008000 + -- Negotiate Always Sign + 0x00080000 + -- Negotiate NTLM2 Key + 0x20000000 + -- Negotiate 128 + 0x80000000 -- Negotiate 56 + )) + ) + +portrule = shortport.port_or_service({ 143, 993 }, { "imap", "imaps" }) + +action = function(host, port) + + local output = stdnse.output_table() + + local starttls = sslcert.isPortSupported(port) + local socket + if starttls then + local status + status, socket = starttls(host, port) + if not status then + -- could be socket problems, but more likely STARTTLS not supported. + stdnse.debug1("starttls error: %s", socket) + socket = nil + end + end + if not socket then + local line, bopt, first_line + socket, line, bopt, first_line = comm.tryssl(host, port, "" , {recv_before=true}) + if not socket then + stdnse.debug1("connection error: %s", line) + return nil + end + end + + socket:send("000b AUTHENTICATE NTLM\r\n") + local status, response = socket:receive() + if not status then + stdnse.debug1("Socket receive failed: %s", response) + return nil + end + if not response then + stdnse.debug1("No response to AUTHENTICATE NTLM") + return nil + end + + socket:send(ntlm_auth_blob .. "\r\n") + status, response = socket:receive() + if not status then + stdnse.debug1("Socket receive failed: %s", response) + return nil + end + if not response then + stdnse.debug1("No response to NTLM challenge") + return nil + end + + local recvtime = os.time() + socket:close() + + if string.match(response, "^A%d%d%d%d ") then + stdnse.debug2("NTLM auth not supported.") + return nil + end + + -- Continue only if a + response is returned + local response_decoded = string.match(response, "+ (.*)") + if not response_decoded then + stdnse.debug1("Unexpected response to NTLM challenge: %s", response) + return nil + end + + local response_decoded = base64.dec(response_decoded) + + -- Continue only if NTLMSSP response is returned + if not string.match(response_decoded, "^NTLMSSP") then + stdnse.debug1("Unexpected response to NTLM challenge: %s", response) + return nil + end + + -- Leverage smbauth.get_host_info_from_security_blob() for decoding + local ntlm_decoded = smbauth.get_host_info_from_security_blob(response_decoded) + + if ntlm_decoded.timestamp then + -- 64-bit number of 100ns clicks since 1/1/1601 + local unixstamp = ntlm_decoded.timestamp // 10000000 - 11644473600 + datetime.record_skew(host, unixstamp, recvtime) + end + + -- Target Name will always be returned under any implementation + output.Target_Name = ntlm_decoded.target_realm + + -- Display information returned & ignore responses with null values + if ntlm_decoded.netbios_domain_name and #ntlm_decoded.netbios_domain_name > 0 then + output.NetBIOS_Domain_Name = ntlm_decoded.netbios_domain_name + end + + if ntlm_decoded.netbios_computer_name and #ntlm_decoded.netbios_computer_name > 0 then + output.NetBIOS_Computer_Name = ntlm_decoded.netbios_computer_name + end + + if ntlm_decoded.dns_domain_name and #ntlm_decoded.dns_domain_name > 0 then + output.DNS_Domain_Name = ntlm_decoded.dns_domain_name + end + + if ntlm_decoded.fqdn and #ntlm_decoded.fqdn > 0 then + output.DNS_Computer_Name = ntlm_decoded.fqdn + end + + if ntlm_decoded.dns_forest_name and #ntlm_decoded.dns_forest_name > 0 then + output.DNS_Tree_Name = ntlm_decoded.dns_forest_name + end + + if ntlm_decoded.os_major_version then + output.Product_Version = string.format("%d.%d.%d", + ntlm_decoded.os_major_version, ntlm_decoded.os_minor_version, ntlm_decoded.os_build) + end + + return output + +end -- cgit v1.2.3