Nmap 7.80 (DefCon version) released! new NSE scripts/libs, new Npcap
nmap (“Network Mapper“) is an open source tool for network exploration and security auditing. It was designed to rapidly scan large networks, although it works fine to scan single hosts. nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. While nmap is commonly used for security audits, many systems and network administrators find it useful for routine tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime.
The output from nmap is a list of scanned targets, with supplemental information on each depending on the options used. Key among that information is the “interesting ports table”. That table lists the port number and protocol, service name, and state. The state is either open, filtered, closed, or unfiltered.
- Open means that an application on the target machine is listening for connections/packets on that port.
- Filtered means that a firewall, filter, or other network obstacle is blocking the port so that nmap cannot tell whether it is open or closed.
- Closed ports have no application listening on them, though they could open up at any time. Ports are classified as unfiltered. when they are responsive to nmap’s probes, but nmap cannot determine whether they are open or closed. nmap reports the state combinations open|filtered and closed|filtered when it cannot determine which of the two states describe a port. The port table may also include software version details when version detection has been requested. When an IP protocol scan is requested (-sO), nmap provides information on supported IP protocols rather than listening ports.
In addition to the interesting ports table, nmap can provide further information on targets, including reverse DNS names, operating system guesses, device types, and MAC addresses.
Changelog Nmap 7.80:
o [Windows] The Npcap Windows packet capturing library (https://npcap.org/)
is faster and more stable than ever. Nmap 7.80 updates the bundled Npcap
from version 0.99-r2 to 0.9982, including all of these changes from the
last 15 Npcap releases: https://nmap.org/npcap/changelogo [NSE] Added 11 NSE scripts, from 8 authors, bringing the total up to 598!
They are all listed at https://nmap.org/nsedoc/, and the summaries are
below:+ [GH#1232] broadcast-hid-discoveryd discovers HID devices on a LAN by
sending a discoveryd network broadcast probe. [Brendan Coles]+ [GH#1236] broadcast-jenkins-discover discovers Jenkins servers on a LAN
by sending a discovery broadcast probe. [Brendan Coles]+ [GH#1016][GH#1082] http-hp-ilo-info extracts information from HP
Integrated Lights-Out (iLO) servers. [rajeevrmenon97]+ [GH#1243] http-sap-netweaver-leak detects SAP Netweaver Portal with the
Knowledge Management Unit enabled with anonymous access. [ArphanetX]+ https-redirect detects HTTP servers that redirect to the same port, but
with HTTPS. Some nginx servers do this, which made ssl-* scripts not run
properly. [Daniel Miller]+ [GH#1504] lu-enum enumerates Logical Units (LU) of TN3270E servers.
[Soldier of Fortran]+ [GH#1633] rdp-ntlm-info extracts Windows domain information from RDP
services. [Tom Sellers]+ smb-vuln-webexec checks whether the WebExService is installed and allows
code execution. [Ron Bowes]+ smb-webexec-exploit exploits the WebExService to run arbitrary commands
with SYSTEM privileges. [Ron Bowes]+ [GH#1457] ubiquiti-discovery extracts information from the Ubiquiti
Discovery service and assists version detection. [Tom Sellers]+ [GH#1126] vulners queries the Vulners CVE database API using CPE
information from Nmap’s service and application version detection.
[GMedian, Daniel Miller]o [GH#1291][GH#34][GH#1339] Use pcap_create instead of pcap_live_open in
Nmap, and set immediate mode on the pcap descriptor. This solves packet
loss problems on Linux and may improve performance on other platforms.
[Daniel Cater, Mike Pontillo, Daniel Miller]o [NSE] Collected utility functions for string processing into a new
library, stringaux.lua. [Daniel Miller]o [NSE] New rand.lua library uses the best sources of random available on
the system to generate random strings. [Daniel Miller]o [NSE] New library, oops.lua, makes reporting errors easy, with plenty of
debugging detail when needed, and no clutter when not. [Daniel Miller]o [NSE] Collected utility functions for manipulating and searching tables
into a new library, tableaux.lua. [Daniel Miller]o [NSE] New knx.lua library holds common functions and definitions for
communicating with KNX/Konnex devices. [Daniel Miller]o [NSE][GH#1571] The HTTP library now provides transparent support for gzip-
encoded response body. (See https://github.com/nmap/nmap/pull/1571 for an
overview.) [nnposter]o [Nsock][Ncat][GH#1075] Add AF_VSOCK (Linux VM sockets) functionality to
Nsock and Ncat. VM sockets are used for communication between virtual
machines and the hypervisor. [Stefan Hajnoczi]o [Security][Windows] Address CVE-2019-1552 in OpenSSL by building with the
prefix “C:\Program Files (x86)\Nmap\OpenSSL”. This should prevent
unauthorized users from modifying OpenSSL defaults by writing
configuration to this directory.o [Security][GH#1147][GH#1108] Reduced LibPCRE resource limits so that
version detection can’t use as much of the stack. Previously Nmap could
crash when run on low-memory systems against target services which are
intentionally or accidentally difficult to match. Someone assigned
CVE-2018-15173 for this issue. [Daniel Miller]o [GH#1361] Deprecate and disable the -PR (ARP ping) host discovery
option. ARP ping is already used whenever possible, and the -PR option
would not force it to be used in any other case. [Daniel Miller]o [NSE] bin.lua is officially deprecated. Lua 5.3, added 2 years ago in Nmap
7.25BETA2, has native support for binary data packing via string.pack and
string.unpack. All existing scripts and libraries have been updated.
[Daniel Miller]o [NSE] Completely removed the bit.lua NSE library. All of its functions are
replaced by native Lua bitwise operations, except for `arshift`
(arithmetic shift) which has been moved to the bits.lua library. [Daniel
Miller]o [NSE][GH#1571] The HTTP library is now enforcing a size limit on the
received response body. The default limit can be adjusted with a script
argument, which applies to all scripts, and can be overridden case-by-case
with an HTTP request option. (See https://github.com/nmap/nmap/pull/1571
for details.) [nnposter]o [NSE][GH#1648] CR characters are no longer treated as illegal in script
XML output. [nnposter]o [GH#1659] Allow resuming nmap scan with lengthy command line [Clément
Notin]o [NSE][GH#1614] Add TLS support to rdp-enum-encryption. Enables determining
protocol version against servers that require TLS and lays ground work for
some NLA/CredSSP information collection. [Tom Sellers]o [NSE][GH#1611] Address two protocol parsing issues in rdp-enum-encryption
and the RDP nse library which broke scanning of Windows XP. Clarify
protocol types [Tom Sellers]o [NSE][GH#1608] Script http-fileupload-exploiter failed to locate its
resource file unless executed from a specific working
directory. [nnposter]o [NSE][GH#1467] Avoid clobbering the “severity” and “ignore_404” values of
fingerprints in http-enum. None of the standard fingerprints uses these
fields. [Kostas Milonas]o [NSE][GH#1077] Fix a crash caused by a double-free of libssh2 session data
when running SSH NSE scripts against non-SSH services. [Seth Randall]o [NSE][GH#1565] Updates the execution rule of the mongodb scripts to be
able to run on alternate ports. [Paulino Calderon]o [Ncat][GH#1560] Allow Ncat to connect to servers on port 0, provided that
the socket implementation allows this. [Daniel Miller]o Update the included libpcap to 1.9.0. [Daniel Miller]
o [NSE][GH#1544] Fix a logic error that resulted in scripts not honoring the
smbdomain script-arg when the target provided a domain in the NTLM
challenge. [Daniel Miller]o [Nsock][GH#1543] Avoid a crash (Protocol not supported) caused by trying
to reconnect with SSLv2 when an error occurs during DTLS connect. [Daniel
Miller]o [NSE][GH#1534] Removed OSVDB references from scripts and replaced them
with BID references where possible. [nnposter]o [NSE][GH#1504] Updates TN3270.lua and adds argument to disable TN3270E
[Soldier of Fortran]o [GH#1504] RMI parser could crash when encountering invalid input [Clément
Notin]o [GH#863] Avoid reporting negative latencies due to matching an ARP or ND
response to a probe sent after it was recieved. [Daniel Miller]o [Ncat][GH#1441] To avoid confusion and to support non-default proxy ports,
option –proxy now requires a literal IPv6 address to be specified using
square-bracket notation, such as –proxy [2001:db8::123]:456. [nnposter]o [Ncat][GH#1214][GH#1230][GH#1439] New ncat option provides control over
whether proxy destinations are resolved by the remote proxy server or
locally, by Ncat itself. See option –proxy-dns. [nnposter]o [NSE][GH#1478] Updated script ftp-syst to prevent potential endless
looping. [nnposter]o [GH#1454] New service probes and match lines for v1 and v2 of the Ubiquiti
Discovery protocol. Devices often leave the related service open and it
exposes significant amounts of information as well as the risk of being
used as part of a DDoS. New nmap-payload entry for v1 of the
protocol. [Tom Sellers]o [NSE] Removed hostmap-ip2hosts.nse as the API has been broken for a while
and the service was completely shutdown on Feb 17th, 2019. [Paulino
Calderon]o [NSE][GH#1318] Adds TN3270E support and additional improvements to
tn3270.lua and updates tn3270-screen.nse to display the new
setting. [mainframed]o [NSE][GH#1346] Updates product codes and adds a check for response length
in enip-info.nse. The script now uses string.unpack. [NothinRandom]o [Ncat][GH#1310][GH#1409] Temporary RSA keys are now 2048-bit to resolve a
compatibility issue with OpenSSL library configured with security level 2,
as seen on current Debian or Kali. [Adrian Vollmer, nnposter]o [NSE][GH#1227] Fix a crash (double-free) when using SSH scripts against
non-SSH services. [Daniel Miller]o [Zenmap] Fix a crash when Nmap executable cannot be found and the system
PATH contains non-UTF-8 bytes, such as on Windows. [Daniel Miller]o [Zenmap] Fix a crash in results search when using the dir: operator:
AttributeError: ‘SearchDB’ object has no attribute ‘match_dir’ [Daniel
Miller]o [Ncat][GH#1372] Fixed an issue with Ncat -e on Windows that caused early
termination of connections. [Alberto Garcia Illera]o [NSE][GH#1359] Fix a false-positive in http-phpmyadmin-dir-traversal when
the server responds with 200 status to a POST request to any
URI. [Francesco Soncina]o [NSE] New vulnerability state in vulns.lua, UNKNOWN, is used to indicate
that testing could not rule out vulnerability. [Daniel Miller]o [GH#1355] When searching for Lua header files, actually use them where
they are found instead of forcing /usr/include. [Fabrice Fontaine, Daniel
Miller]o [NSE][GH#1331] Script traceroute-geolocation no longer crashes when
www.GeoPlugin.net returns null coordinates [Michal Kubenka, nnposter]o Limit verbose -v and debugging -d levels to a maximum of 10. Nmap does not
use higher levels internally. [Daniel Miller]o [NSE] tls.lua when creating a client_hello message will now only use a
SSLv3 record layer if the protocol version is SSLv3. Some TLS
implementations will not handshake with a client offering less than
TLSv1.0. Scripts will have to manually fall back to SSLv3 to talk to
SSLv3-only servers. [Daniel Miller]o [NSE][GH#1322] Fix a few false-positive conditions in
ssl-ccs-injection. TLS implementations that responded with fatal alerts
other than “unexpected message” had been falsely marked as
vulnerable. [Daniel Miller]o Emergency fix to Nmap’s birthday announcement so Nmap wishes itself a
“Happy 21st Birthday” rather than “Happy 21th” in verbose mode (-v) on
September 1, 2018. [Daniel Miller]o [GH#1150] Start host timeout clocks when the first probe is sent to a
host, not when the hostgroup is started. Sometimes a host doesn’t get
probes until late in the hostgroup, increasing the chance it will time
out. [jsiembida]o [NSE] Support for edns-client-subnet (ECS) in dns.lua has been improved
by:
– [GH#1271] Using ECS code compliant with RFC 7871 [John Bond]
– Properly trimming ECS address, as mandated by RFC 7871 [nnposter]
– Fixing a bug that prevented using the same ECS option table more than
once [nnposter]o [Ncat][GH#1267] Fixed communication with commands launched with -e or -c
on Windows, especially when –ssl is used. [Daniel Miller]o [NSE] Script http-default-accounts can now select more than one
fingerprint category. It now also possible to select fingerprints by name
to support very specific scanning. [nnposter]o [NSE] Script http-default-accounts was not able to run against more than
one target host/port. [nnposter]o [NSE][GH#1251] New script-arg `http.host` allows users to force a
particular value for the Host header in all HTTP requests.o [NSE][GH#1258] Use smtp.domain script arg or target’s domain name instead
of “example.com” in EHLO command used for STARTTLS. [gwire]o [NSE][GH#1233] Fix brute.lua’s BruteSocket wrapper, which was crashing
Nmap with an assertion failure due to socket mixup [Daniel Miller]: nmap:
nse_nsock.cc:672: int receive_buf(lua_State*, int, lua_KContext):
Assertion `lua_gettop(L) == 7′ failed.o [NSE][GH#1254] Handle an error condition in smb-vuln-ms17-010 caused by
IPS closing the connection. [Clément Notin]o [Ncat][GH#1237] Fixed literal IPv6 URL format for connecting through HTTP
proxies. [Phil Dibowitz]o [NSE][GH#1212] Updates vendors from ODVA list for enip-info.
[NothinRandom]o [NSE][GH#1191] Add two common error strings that improve MySQL detection
by the script http-sql-injection. [Robert Taylor, Paulino Calderon]o [NSE][GH#1220] Fix bug in http-vuln-cve2006-3392 that prevented the script
to generate the vulnerability report correctly. [rewardone]o [NSE][GH#1218] Fix bug related to screen rendering in NSE library
tn3270. This patch also improves the brute force script
tso-brute. [mainframed]o [NSE][GH#1209] Fix SIP, SASL, and HTTP Digest authentication when the
algorithm contains lowercase characters. [Jeswin Mathai]o [GH#1204] Nmap could be fooled into ignoring TCP response packets if they
used an unknown TCP Option, which would misalign the validation, causing
it to fail. [Clément Notin, Daniel Miller]o [NSE]The HTTP response parser now tolerates status lines without a reason
phrase, which improves compatibility with some HTTP servers. [nnposter]o [NSE][GH#1169][GH#1170][GH#1171]][GH#1198] Parser for HTTP Set-Cookie
header
is now more compliant with RFC 6265:
– empty attributes are tolerated
– double quotes in cookie and/or attribute values are treated literally
– attributes with empty values and value-less attributes are parsed
equally
– attributes named “name” or “value” are ignored
[nnposter]o [NSE][GH#1158] Fix parsing http-grep.match script-arg. [Hans van den
Bogert]o [Zenmap][GH#1177] Avoid a crash when recent_scans.txt cannot be written
to. [Daniel Miller]o Fixed –resume when the path to Nmap contains spaces. Reported on Windows
by Adriel Desautels. [Daniel Miller]o New service probe and match lines for adb, the Android Debug Bridge, which
allows remote code execution and is left enabled by default on many
devices. [Daniel Miller]
