#Nmap Changelog ($Id: CHANGELOG 39390 2026-03-21 16:04:35Z dmiller $); -*-text-*-

Nmap 7.99 [2026-03-24]

o Integrated many of the most-frequently-submitted IPv4 and IPv6 OS
  fingerprints, as well as dozens of updated service fingerprints.

o Upgraded included libraries: OpenSSL 3.0.19, libpcap 1.10.6, libpcre2 10.47,
  liblinear 2.50, zlib 1.3.2

o [Windows] Upgraded the included version of Npcap from 1.83 to 1.87, resolving
  several crashes and stability-related issues. See https://npcap.com/changelog

o [Zenmap][GH#3182] Zenmap is now distributed as a universal wheel
  (zenmap-7.99-py3-none-any.whl) instead of an RPM package so that it can be
  installed on any system with Python 3. [Daniel Miller]

o [Ncat][Windows] Limited the number of handles inherited by subprocesses
  launched with -e, preventing interference between clients when -e and
  --keep-open are used. Reported by Nimish Verma.

o [Ncat] Several fixes for regressions or longstanding failure cases in
  ncat-test.pl [Daniel Miller]:

  + [Windows] Fixed handling of socket EOF with --exec

  + Fixed the -i (idle timeout) option for listen mode, which was broken
    when adding the -q option in Ncat 7.96

  + Fixed HTTP proxy server when SSL is used.

  + DTLS (SSL over UDP) shutdown connection on stdin EOF.

o [Windows][GH#2711] Nmap now supports scanning over various VPN virtual
  adapters like OpenVPN TAP adapters. [Daniel Miller]

o [GH#3280] Fix a performance regression in reverse-DNS in Nmap 7.98. The fix
  for #3130 had caused Nmap to send requests too slowly. [Daniel Miller]

o [macOS][GH#3289] Fixed a configure-time failure in libdnet that resulted in
  incorrect MAC addresses being reported. [Daniel Miller]

o [Zenmap][GH#3189] Fix a crash in Zenmap topology and hosts viewer:
  "TypeError: format requires a mapping" [Daniel Miller]

o [GH#2955] Fix a routing issue with -e and -S related to #2206
  causing error "setup_target: failed to determine route" [Daniel Miller]

o [GH#3214] Improve compatibility of build process on various platforms and add
  multiplatform autobuilds in Github workflow. [Jordan Ritter]

o [NSE][GH#2183][GH#3239] Script hostmap-crtsh now reports only true subdomains
  of a given target hostname by default. In the past, it was reporting any
  DNS name that included the target hostname as a substring (but not
  necessarily as a suffix). The old behavior can be enabled by setting script
  argument hostmap-crtsh.lax. [Sweekar-cmd, nnposter]

o [NSE] Function url.parse_query was not interpreting plus signs as spaces.
  [nnposter]

o [NSE] Function url.parse was not properly parsing URLs with query strings
  but empty paths. [nnposter]

o [NSE][GH#3287] Functions tableaux.tcopy and tableaux.shallow_tcopy were
  not behaving the same when the input table had a custom __pairs metamethod.
  Both functions now perform a raw copy, ignoring the metamethod. [nnposter]

o [NSE] Function tableaux.shallow_tcopy did not work correctly for tables
  with Boolean keys. [nnposter]

o [NSE] IPP print queue job details were not getting populated, having
  a hard dependency on Apple-specific attributes. [nnposter]

o [NSE][GH#3245] Functions connect and close have been removed from the IPP
  library, as they served no purpose. [nnposter]

o [NSE] ipOps.expand_ip was crashing upon malformed IPv6 addresses. [nnposter]

o [NSE][GH#3262] FTP banner parsing is now more closely aligned with RFC 959,
  section 4.2. [nnposter]

o [NSE][GH#3253] Function stdnse.make_buffer now accepts an extra parameter
  that allows preloading the newly created buffer with data. [nnposter]

o [NSE][GH#3191][GH#3218] Script http-internal-ip-disclosure has been enhanced,
  including added support for IPv6 and HTTPS and more accurate processing
  of target responses. [nnposter]

o [NSE][GH#3194] RPC-based scripts were sporadically failing due to privileged
  port conflicts. [nnposter]

o [NSE][GH#3196] Script rlogin-brute was sporadically failing due to using
  an off-by-one range for privileged ports and not handling potential
  port conflicts. [nnposter]

Nmap 7.98 [2025-08-21]

o [SECURITY] Rebuilt the Windows self-installer with NSIS 3.11, addressing
  CVE-2025-43715--a race condition in earlier NSIS versions that could allow
  local attackers to escalate to SYSTEM privileges when a vulnerable installer is
  run as SYSTEM. The Nmap installer does not run as SYSTEM by default.

o Upgraded included libraries: OpenSSL 3.0.17, Lua 5.4.8

o [Windows] Upgraded the included version of Npcap from 1.82 to 1.83, improving
  compatibility with PPPoE connections. See https://npcap.com/changelog

o [macOS][GH#3127] Fix "dnet: Failed to open device en0" errors on macOS since
  Nmap 7.96. [Daniel Miller]

o Fixed an issue in FTP bounce scan where a single null byte is written past
  the end of the receive buffer. The issue is triggered by a malicious server
  but does not cause a crash with default builds. [Tyler Zars]

o [GH#3130] Fix a crash (stack exhaustion due to excessive recursion) in the
  parallel DNS resolver. Additionally, improved performance by processing
  responses that come after the request has timed out. [Daniel Miller]

o [GH#2148] Fix the error, "Assertion failed: (datalink == DLT_EN10MB), function begin_sniffer, file scan_engine_raw.cc"
  when using Nmap with certain VPN interfaces. [Daniel Miller]

o [GH#2757] Fix a crash in traceroute when using randomly-generated decoys:
  "Assertion `source->ss_family == AF_INET' failed" [Daniel Miller]

o [GH#2899] When IP protocol scanning on IPv6 (-sO -6), skip protocol numbers
  that are registered as Extension Header values. When the --data option was
  used, these would fail the assertion "len == (u32) ntohs(ip6->ip6_plen)"
  [Daniel Miller]

o [GH#3086] Prevent TCP Connect scan (-sT) from leaking one socket per
  hostgroup, which led to progressively slower scans and assertion failures in
  other scan phases. [Daniel Miller]

o [NSE][GH#3133] Fix the error "nse_nsock.cc:637: void receive_callback(nsock_pool, nsock_event, void*): Assertion `lua_status(L) == 1' failed."
  when reading from an SSL connection. [Daniel Miller]

o [NSE] Added NSE bindings for more libssh2 functions: channel_request,
  channel_request_pty_ex, channel_shell, and userauth_keyboard_interactive.
  ssh-brute will now use keyboard-interactive auth if password auth is not
  offered. [Daniel Miller, CrowdStrike]

o [NSE][GH#3014] Fix dns-zone-transfer to handle nontraditional TLDs [Daniel Miller]

o Fix a bug that was causing Nmap to send empty DNS packets for each target
  that was not found up instead of just skipping them for reverse DNS.

o [NSE] Fix/update/enhance tls.lua for newer TLSv1.3 ciphers, including
  post-quantum ciphersuites.

o [GH#3114][Windows] Use only the DNS servers for up and configured interfaces
  for forward and reverse DNS lookups. When -e or -S are used, use only DNS
  servers that can be connected via that interface or source address. [Daniel Miller]

o [Ndiff][GH#3115] Have configure script check for PyPA 'build' module. [Daniel Miller]

o [Zenmap] Updated Spanish and Chinese language strings for Zenmap to cover latest strings.

o [Zenmap][GH#2718] Zenmap language translation (i18n) files were not being
  installed. [Daniel Miller]

o [Zenmap][GH#3066] Fix Zenmap error "ValueError: I/O operation on closed file"
  when Nmap crashes or fails. [Daniel Miller]

o [Zenmap][GH#3084][GH#3127] Fix UnicodeDecodeError issues in ScriptMetadata
  and UmitConfigParser. [Daniel Miller]

o [NSE][GH#3123] WS-Discovery parsing would error out if the MessageID UUID
  was not prefixed with "urn:". [nnposter]

Nmap 7.97 [2025-05-12]

o [Zenmap][GH#3087] Fix a crash when starting a scan on Windows in locales that
  use non-latin character sets. Also changed Nmap to print the time zone as an
  offset from UTC instead of as a localized string. [Daniel Miller]

o Fixed an issue with the parallel forward DNS resolver: it had not been
  consulting /etc/hosts, nor did it correctly handle the 'localhost' name.
  [Daniel Miller]

o [GH#3088] Mitigate a false-positive detection by replacing a malicious URL in
  the example output of http-malware-host [nnposter]

Nmap 7.96 [2025-05-01]

o Upgraded included libraries: OpenSSL 3.0.16, Lua 5.4.7, libssh2 1.11.1,
  libpcap 1.10.5, libpcre2 10.45, libdnet 1.18.0

o [Windows] Upgraded the included version of Npcap from version 1.79 to the
  latest version 1.82, bringing faster packet injection, VLAN header capture,
  and support for SR-IOV adapters, along with many other bug fixes and feature
  enhancements described at https://npcap.com/changelog

o [GH#1451] Nmap now performs forward DNS lookups in parallel, using the same
  engine that has been reliably performing reverse-DNS lookups for nearly a
  decade. Scanning large lists of hostnames is now enormously faster and avoids
  the unresponsive wait for blocking system calls, so progress stats can be
  shown. In testing, resolving 1 million website names to both IPv4 and IPv6
  took just over an hour. The previous system took 49 hours for the same data
  set! [Daniel Miller]

o [Nping][GH#2862] Promoted Nping version number from a 0.7.95 alpha release to
  the same release version as Nmap.

o [Zenmap][GH#2358] Added dark mode, accessed via Profile->Toggle Dark Mode or
  window::dark_mode in zenmap.conf. [Daniel Miller]

o [NSE] Added 3 new scripts, for a total of 612 NSE scripts:

  + [GH#2973] mikrotik-routeros-version queries MikroTik's WinBox router admin
    service to get the RouterOS version. New service probes were also added for
    this service. [deauther890, Daniel Miller]

  + mikrotik-routeros-username-brute brute-forces WinBox usernames for the
    router using CVE-2024-54772. [deauther890]

  + targets-ipv6-eui64 generates target IPv6 addresses from a user-provided
    file of MAC addresses, using the EUI-64 method. [Daniel Miller]

o [GH#2982] Fixed an issue preventing the Nmap OEM 7.95 uninstaller from
  correctly uninstalling Nmap OEM.

o [GH#2139][Nsock][Windows] Fixed the IOCP Nsock engine, which had been demoted
  since Nmap 7.91 due to unresolved issues around SSL sockets and IPv6. [Daniel Miller]

o [GH#2113] Fixed the issue where TCP Connect scans (-sT) on Windows would show
  'filtered' instead of 'closed', due to differences in understanding timeouts.

o [GH#2900][GH#2896][GH#2897] Nmap is now able to scan IP protocol 255.
  [nnposter]

o Nmap will now allow targets to be specified both on the command line and in
  an input file with -iL. Previously, if targets were provided in both places,
  only the targets in the input file would be scanned, and no notice was given
  that the command-line targets were ignored. [Daniel Miller]

o [Zenmap][GH#2854] Fixed a Zenmap crash in DiffViewer when Ndiff exits with error.

o [Zenmap] Fixed several UnicodeDecodeError or UnicodeEncodeError crashes
  throughout Zenmap.

o [Zenmap][GH#1696] Fixed an issue preventing Zenmap from launching if nmap was
  not in the PATH. The issue primarily affected macOS users. [Daniel Miller]

o [GH#2838][GH#2836] Fixed a couple of issues with parsing the argument to the
  -iR option.

o [NSE][GH#2852] Added TLS support to redis.lua and improved -sV detection of redis.

o [GH#2954] Fix 2 potential crashes in parsing IPv6 extension headers
  discovered using AFL++ fuzzer. [Domen Puncer Kugler, Daniel Miller]

o [Nping] Bind raw socket to device when possible. This was already done for
  IPv6, but was needed for IPv4 L3 tunnels. [ValdikSS]

o [Ncat] Ncat in connect mode no longer defaults to half-closed TCP
  connections. This makes it more compatible with other netcats. The -k option
  will enable the old behavior. See https://seclists.org/nmap-dev/2013/q1/188
  [Daniel Miller]

o [Nsock][GH#2788] Fix an issue affecting Ncat where unread bytes in the SSL
  layer's buffer could not be read until more data arrived on the socket, which
  could lead to deadlock. [Daniel Miller]

o [Ncat][GH#2422] New Ncat option -q to delay quit after EOF on stdin, the
  same as traditional netcat's -q option. [Daniel Miller]

o [Ncat][GH#2843] Ncat in listen mode with -e or -c correctly handles error and
  EOF conditions that had not been being delivered to the child process.

o [Ncat][Windows] All Nsock engines now work correctly. The default is still
  'select', but others can be set with --nsock-engine=iocp or
  --nsock-engine=poll [Daniel Miller]

o [NSE][GH#1014][GH#2616] SSH NSE scripts now catch connection errors thrown by
  the libssh2 Lua binding, providing useful output instead of a backtrace.
  [Joshua Rogers, Daniel Miller]

o [NSE] Several fixes and extensions to the libssh2 NSE bindings: fixed
  libssh2.channel_read_stderr, which was reading stdout instead; add binding
  for libssh2_userauth_publickey_frommemory; allow open_channel to avoid allocating a pty;

o [Nsock] Improvements for platforms without selectable pcap handles (e.g.
  Windows). Interleaved pcap and socket events were favoring pcap reads,
  possibly resulting in timeouts of the socket events. [Daniel Miller]

o [Nsock] Improved memory performance of poll engine on Windows. [Daniel Miller]

o [Nsock][GH#187][GH#2912] Improvements to Nsock event list management, fixing
  errors like "could not find 1 of the purportedly pending events on that IOD." [Daniel Miller]

o When Nmap is used with --disable-arp-ping, a local IP that cannot be
  ARP-resolved will use the "no-route" reason instead of the "unknown-response"
  reason, since no response was received.

o [NSE][GH#2571][GH#2572][GH#2622][GH#2784] Various bug fixes in the mssql NSE
  library. [johnjaylward, nnposter]

o [NSE][GH#2925][GH#2917][GH#2924] Testing for acceptance of SSH keys for
  a given username caused heap corruption. [Julijan Nedic, nnposter]

o [NSE][GH#2919][GH#2917] Scripts were not able to load SSH public keys.
  from a file. [nnposter]

o [NSE][GH#2928][GH#2640] Encryption/decryption performed by the OpenSSL NSE
  module did not work correctly when the IV started with a null byte.
  [nnposter]

o [NSE][GH#2901][GH#2744][GH#2745] Arbitrary separator in stdnse.tohex() is now
  supported. Script smb-protocols now reports SMB dialects correctly.
  [nnposter]

o [NSE] ether_type inconsistency in packet.Frame has been resolved. Both
  Frame:new() and Frame:build_ether_frame() now use an integer. [nnposter]

Nmap 7.95 [2024-04-23]

o Integrated over 4,000 of your IPv4 OS fingerprints. Added 336 signatures,
  bringing the new total to 6,036.  Additions include iOS 15 & 16, macOS
  Ventura & Monterey, Linux 6.1, OpenBSD 7.1, and lwIP 2.2

o Integrated over 2,500 service/version detection fingerprints. The signature
  count went up 1.4% to 12,089, including 9 new softmatches.  We now detect
  1,246 protocols, including new additions of grpc, mysqlx, essnet,
  remotemouse, and tuya.

o [Windows] Upgraded Npcap (our Windows raw packet capturing and transmission
  driver) from version 1.75 to the latest version 1.79. It includes many
  performance improvements, bug fixes and feature enhancements described at
  https://npcap.com/changelog.

o [NSE] Added four new scripts from the DINA community
  (https://github.com/DINA-community) for querying industrial control
  systems:

  + hartip-info reads device information from devices using the Highway
    Addressable Remote Transducer protocol

  + iec61850-mms queries devices using Manufacturing Message Specification
    requests. [Dennis Rösch, Max Helbig]

  + multicast-profinet-discovery Sends a multicast PROFINET DCP Identify All
    message and prints the responses. [Stefan Eiwanger, DINA-community]

  + profinet-cm-lookup queries the DCERPC endpoint mapper exposed via the
    PNIO-CM service.

o Improvements to OS detection fingerprint matching, including a syntax
  change for nmap-os-db that allows ranges within the TCP Options
  string. This leads to more concise and maintainable fingerprints. [Daniel
  Miller]

o Improved the OS detection engine by using a new source port for each retry.
  Scans from systems such as Windows that do not send RST for unsolicited
  SYN|ACK responses were previously unable to get a response in subsequent
  tries. [Daniel Miller]

o Several profile-guided optimizations of the port scan engine. [Daniel Miller]

o Upgraded from libpcre 7.6 to libpcre2 10.43.

o Upgraded included libraries: Lua 5.4.6, zlib 1.3.1, libssh2 1.11.0, and
  liblinear 2.47

o [GH#2639] Upgraded OpenSSL binaries (for the Windows builds and for RPMs)
  to version 3.0.13. This addresses various OpenSSL vulnerabilities which
  don't impact Nmap (full details are in the GH issue).

o [GH#2672] Fixed an issue where TCP Connect scan (-sT) on Windows would fail
  to open any sockets, leading to scans that never finish. [Daniel Miller]

o [Zenmap][Ndiff][GH#2649] Zenmap and Ndiff now use setuptools, not distutils
   for packaging.

o [Ncat][GH#2685] Fixed Ncat UDP server mode to not quit after EOF on
  stdin. Reported as Debian bug:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1039613

o [NSE] ssh-auth-methods will now print the pre-authentication banner text
  when available. Requires libssh2 1.11.0 or later. [Daniel Miller]

o [Zenmap][GH#2739] Fix a crash in Zenmap when changing a host comment.

o [NSE][GH#2766] Fix TLS 1.2 signature algorithms for EdDSA. [Daniel Roethlisberger]

o [Zenmap][GH#2706] RPM spec files now correctly require the python3 package, not python>=3

o [GH#2731] Fix an out-of-bounds read which led to out-of-memory errors when
  duplicate addresses were used with --exclude

o [GH#2609] Fixed a memory leak in Nsock: compiled pcap filters were not freed.

o [GH#2658] Fixed a crash when using service name wildcards with -p, as in -p "http*"

o [GH#2657] Fixed an issue where NSE-assigned service names could be overwritten
  prior to output, leading to XML validation errors and unprintable screen output.

o [NSE] Fixed DNS TXT record parsing bug which caused asn-query to fail in
  Nmap 7.80 and later. [David Fifield, Mike Pattrick]

o [NSE][GH#2727][GH#2728] Fixed packet size testing in KNX scripts [f0rw4rd]

Nmap 7.94 [2023-05-19]

o Zenmap and Ndiff now use Python 3! Thanks to the many contributors who made
  this effort possible:
  + [GH#2088][GH#1176][Zenmap] Updated Zenmap to Python 3 and PyGObject. [Jakub Kulík]

  + [GH#1807][GH#1176][Ndiff] Updated Ndiff to Python 3. [Brian Quigley]

  + Additional Python 3 update fixes by Sam James, Daniel Miller. Special thanks
    to those who opened Python 3-related issues and pull requests: Eli
    Schwartz, Romain Leonard, Varunram Ganesh, Pavel Zhukov, Carey Balboa,
    Hasan Aliyev, and others.

o [Windows] Upgraded Npcap (our Windows raw packet capturing and
  transmission driver) from version 1.71 to the latest version 1.75. It
  includes dozens of performance improvements, bug fixes and feature
  enhancements described at https://npcap.com/changelog.

o Nmap now prints vendor names based on MAC address for MA-S (24-bit), MA-M
  (28-bit), and MA-L (36-bit) registrations instead of the fixed 3-byte MAC
  prefix used previously for lookups.

o Added partial silent-install support to the Nmap Windows
  installer. It previously didn't offer silent mode (/S) because the
  free/demo version of Npcap Windoes packet capturing driver that it
  needs and ships with doesn't include a silent installer. Now with
  the /S option, Nmap checks whether Npcap is already installed
  (either the free version or OEM) and will silently install itself if
  so. This is similar to how the Wireshark installer works and is
  particularly helpful for organizations that want to fully automate
  their Nmap (and Npcap) deployments. See
  https://nmap.org/nmap-silent-install for more details.

o Lots of profile-guided memory and processing improvements for Nmap, including
  OS fingerprint matching, probe matching and retransmission lookups for large
  hostgroups, and service name lookups. Overhauled Nmap's string interning and
  several other startup-related procedures to speed up start times, especially
  for scans using OS detection. [Daniel Miller]

o Integrated many of the most-submitted IPv4 OS fingerprints for recent
  versions of Windows, iOS, macOS, Linux, and BSD. Added 22 fingerprints,
  bringing the new total to 5700!

o [NSE][GH#548] Added the tftp-version script which requests a
  nonexistent file from a TFTP server and matches the error message
  to a database of known software. [Mak Kolybabi]

o [Ncat][GH#1223] Ncat can now accept "connections" from multiple UDP hosts in
  listen mode with the --keep-open option. This also enables --broker and
  --chat via UDP. [Daniel Miller]

o [GH#2575] Upgraded OpenSSL binaries (for the Windows builds and for
  RPM's) to version 3.0.8. This resolves some CVE's (CVE-2022-3602;
  CVE-2022-3786) which don't impact Nmap proper since it doesn't do
  certificate validation, but could possibly impact Ncat when the
  --ssl-verify option is used.

o Upgrade included libraries: zlib 1.2.13, Lua 5.4.4, libpcap 1.10.4

o [GH#2532] Removed the bogus OpenSSL message from the Windows Nmap
  executable which looked like "NSOCK ERROR ssl_init_helper(): OpenSSL
  legacy provider failed to load." We actually already have the legacy
  provider built-in to our OpenSSL builds, and that's why loading the
  external one fails.

o [GH#2541] UDP port scan (-sU) and version scan (-sV) now both use the same
  data source, nmap-service-probes, for data payloads. Previously, the
  nmap-payloads file was used for port scan. Port scan responses will be used
  to kick-start the version matching process. [Daniel Miller]

o Nmap's service scan (-sV) can now probe the UDP service behind a DTLS tunnel,
  the same as it already does for TCP services with SSL/TLS encryption. The
  DTLSSessionReq probe has had its rarity lowered to 2 to allow it to be sent
  sooner in the scan. [Daniel Miller]

o [Ncat] Ncat in listen mode with --udp --ssl will use DTLS to secure incoming
  connections. [Daniel Miller]

o [GH#1023] Handle Internationalized Domain Names (IDN) like Яндекс.рф on
  platforms where getaddrinfo supports the AI_IDN flag. [Daniel Miller]

o [Ncat] Addressed an issue from the Debian bug tracker
  (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=969314) regarding data
  received immediately after a SOCKS CONNECT response. Ncat can now be
  correctly used in the ProxyCommand option of OpenSSH.

o Improved DNS domain name parsing to avoid recursion and enforce name length
  limits, avoiding a theoretical stack exhaustion issue with certain crafted DNS
  server responses, reported by Philippe Antoine.

o [GH#2338][NSE] Fix mpint packing in ssh2 library, which was causing OpenSSH
  errors like "ssh_dispatch_run_fatal: bignum is negative" [Sami Loone]

o [GH#2507] Updates to the Japanese manpage translation by Taichi Kotake.

o [Ncat][GH#1026][GH#2426] Dramatically speed up Ncat transfers on
  Windows by avoiding a 125ms wait for every read from
  STDIN. [scriptjunkie]

o [GH#1192][Windows] Periodically reset the system idle timer to keep the
  system from going to sleep while scans are in process. This only affects port
  scans and OS detection scans, since NSE and version scan do not rely on
  timing data to adjust speed.

o Updated the Nmap Public Source License (NPSL) to Version 0.95. This
  just clarifies that the derivative works definition and all other
  license clauses only apply to parties who choose to accept the
  license in return for the special rights granted (such as Nmap
  redistribution rights). If a party can do everything they need to
  using copyright provisions outside of this license such as fair use,
  we support that and aren't trying to claim any control over their
  work. Versions of Nmap released under previous versions of the NPSL
  may also be used under the NPSL 0.95 terms.

o Avoid storing many small strings from IPv4 OS detection results in the global
  string_pool. These were effectively leaked after a host is done being
  scanned, since string_pool allocations are not freed until Nmap quits.

Nmap 7.93 [2022-09-01]

o This release commemorates Nmap's 25th anniversary! It all started with this
  September 1, 1997 Phrack article by Fyodor: https://nmap.org/p51-11.html.

o [Windows] Upgraded Npcap (our Windows raw packet capturing and
  transmission driver) from version 1.50 to the latest version 1.71. It
  includes dozens of performance improvements, bug fixes and feature
  enhancements described at https://npcap.com/changelog.

o Ensure Nmap builds with OpenSSL 3.0 using no deprecated API functions.
  Binaries for this release include OpenSSL 3.0.5.

o Upgrade included libraries: libssh2 1.10.0, zlib 1.2.12, Lua 5.3.6, libpcap 1.10.1

o [GH#2416] Fix a bug that prevented Nmap from discovering interfaces on Linux
  when no IPv4 addresses were configured. [Daniel Miller, nnposter]

o [NSE][GH#2463] NSE "exception handling" with nmap.new_try() will no longer
  result in a stack traceback in debug output nor a "ERROR: script execution
  failed" message in script output, since the intended behavior has always been
  to end the script immediately without output. [Daniel Miller]

o [GH#2494] Update the Nmap output DTD to match actual output since the
  `<hosthint>` element was added in Nmap 7.90.

o [NSE][GH#2496] Fix newtargets support: since Nmap 7.92, scripts could not add
  targets in script pre-scanning phase. [Daniel Miller]

o [GH#2468] Scripts dhcp-discover and broadcast-dhcp-discover now support
  setting a client identifier. [nnposter]

o [GH#2331][GH#2471] Script oracle-tns-version was not reporting the version
  correctly for Oracle 19c or newer [linholmes]

o [GH#2296][GH#2342] Script redis-info was crashing or producing inaccurate
  information about client connections and/or cluster nodes. [nnposter]

o [GH#2379] Nmap and Nping were unable to obtain system routes on FreeBSD
  [benpratt, nnposter]

o [GH#2464] Script ipidseq was broken due to calling an unreachable library
  function. [nnposter]

o [GH#2420][GH#2436] Support for EC crypto was not properly enabled if Nmap
  was compiled with OpenSSL in a custom location. [nnposter]

o [NSE] Improvements to event handling and pcap socket garbage collection,
  fixing potential hangs and crashes. [Daniel Miller]

o We ceased creating the Nmap win32 binary zipfile. It was useful back when
  you could just unzip it and run Nmap from there, but that hasn't worked well
  for many years. The win32 self-installer handles Npcap installation and many
  other dependencies and complexities. Anyone who needs the binaries for some
  reason can still install Nmap on any system and retrieve them from there.
  For now we're keeping the Win32 zipfile in the Nmap OEM Edition
  (https://nmap.org/oem) for companies building Nmap into their own
  products. But even in that case we believe that running the Nmap OEM
  self-installer in silent mode is a better approach.

o [GH#2388] Fix TDS7 password encoding for mssql.lua, which had been assuming
  ASCII input even though other parts of the library had been passing it Unicode.

o [GH#2402] Replace deprecated CPEs for IIS with their updated identifier,
  cpe:/a:microsoft:internet_information_services [Esa Jokinen]

o [NSE][GH#2393] Fix script-terminating error when unknown BSON data types are
  encountered. Added parsers for most standard data types. [Daniel Miller]

o [Ncat] Fix hostname/certificate comparison and matching to handle ASN.1
  strings without null terminators, a similar bug to OpenSSL's CVE-2021-3712.

o [Ncat][GH#2365] Added support for SOCKS5 proxies that return bind addresses
  as hostnames, instead of IPv4/IPv6 addresses. [pomu0325]

Nmap 7.92 [2021-08-07]

o [Windows] Upgraded Npcap (our Windows raw packet capturing and
  transmission driver) from version 1.00 to the latest version 1.50. You can
  read about the dozens of performance improvements, bug fixes and feature
  enhancements at https://npcap.com/changelog.

o [Windows] Thanks to the Npcap 1.50 upgrade, Nmap now works on the Windows
  ARM architecture so you can run it on lightweight and power-efficient
  tablets like the Microsoft Surface Pro X and Samsung Galaxy Book Go. More
  ARM devices are on the way along with the upcoming Windows 11 release. See
  the Npcap on ARM announcement at
  https://seclists.org/nmap-announce/2021/2.

o [Windows] Updated our Windows builds to Visual Studio 2019, Windows 10
  SDK, and the UCRT. This prevents Nmap from working on Windows Vista and
  earlier, but they can still use older versions of Nmap on their ancient
  operating system.

o New Nmap option --unique will prevent Nmap from scanning the same IP
  address twice, which can happen when different names resolve to the same
  address. [Daniel Miller]

o [NSE][GH#1691] TLS 1.3 now supported by most scripts for which it is
  relevant, such as ssl-enum-ciphers. Some functions like ssl tunnel
  connections and certificate parsing will require OpenSSL 1.1.1 or later to
  fully support TLS 1.3. [Daniel Miller]

o [NSE] Added 3 NSE scripts, from 4 authors, bringing the total up to 604!
  They are all listed at https://nmap.org/nsedoc/, and the summaries are
  below:
  + [GH#2201] nbns-interfaces queries NetBIOS name service (NBNS) to gather
    IP addresses of the target's network interfaces [Andrey Zhukov]

  + [GH#711] openflow-info gathers preferred and supported protocol versions
    from OpenFlow devices [Jay Smith, Mak Kolybabi]

  + port-states prints a list of ports that were found in each state,
    including states that were summarized as "Not shown: X closed ports"
    [Daniel Miller]

o Several changes to UDP payloads to improve accuracy:
  + [GH#2269] Fix an issue with -sU where payload data went out-of-scope
    before it was used, causing corrupted payloads to be sent. [Mariusz
    Ziulek]

  + Nmap's retransmission limits were preventing some UDP payloads from
    being tried with -sU and -PU. Now, Nmap sends each payload for a
    particular port at the same time without delay. [Daniel Miller]

  + New UDP payloads:
    - [GH#1279] TS3INIT1 for UDP 3389 [colcrunch]
    - [GH#1895] DTLS for UDP 3391 (RD Gateway) [Arnim Rupp]

o [NSE][GH#2208][GH#2203] SMB2 dialect handling has been
  redesigned. Visible changes include:  
  * Notable improvement in speed of script smb-protocols and others
  * Some SMB scripts are no longer using a hardcoded dialect, improving
    target interoperability
  * Dialect names are aligned with Microsoft, such as 3.0.2, instead of
    3.02 [nnposter]

o [GH#2350] Upgraded OpenSSL to version 1.1.1k. This addresses some
  CVE's which don't affect Nmap in a material way. Details:
  https://github.com/nmap/nmap/issues/2350

o Removed support for the ancient WinPcap library since we already include
  our own Npcap library (https://npcap.com) supporting the same API. WinPcap
  was abandoned years ago and it's official download page says that "WE
  RECOMMEND USING Npcap INSTEAD" for security, stability, compatibility, and
  support reasons.

o [GH#2257] Fix an issue in addrset matching that was causing all targets to
  be excluded if the --excludefile listed a CIDR range that contains an
  earlier, smaller CIDR range. [Daniel Miller]

o [GH#1922] Fix an issue that would cause Nmap to hang during scans
  with a host timeout, such as -T5.  Any active probes when a target timed out
  were counting towards the global congestion window.

o [GH#2153] Do not count host discovery phase time against the host timeout,
  since Nmap may wait a long time between sending probes to a target while it
  processes other targets instead.

o [GH#2153] Fix issues with matching ICMP Time Exceeded messages that led to
  ignored responses and long scan times when scanning distant targets.

o Upgrade the Windows NSIS installer to use the latest NSIS 3 (version
  3.07) instead of the previous NSIS 2 generation.

o Setting --host-timeout=0 will disable the host timeout, which is set by
  -T5 to 15 minutes. Earlier versions of Nmap require the user to specify a
  very long timeout instead.

o Improvements to Nmap's XML output:
  + If a host times out, the XML <host> element will have the attribute
    timedout="true" and the host's timing info (srtt etc.)  will still be
    printed.

  + The "extrareasons" element now includes a list of port numbers for each
    "ignored" state. The "All X ports" and "Not shown:" lines in normal
    output have been changed slightly to provide more detail. [Daniel
    Miller]

o [NSE][GH#2237] Prevent the ssl-* NSE scripts from probing ports that were
  excluded from version scan, usually 9100-9107, since JetDirect will print
  anything sent to these ports. [Daniel Miller]

o [GH#2206] Nmap no longer produces cryptic message "Failed to convert
  source address to presentation format" when unable to find useable route
  to the target. [nnposter]

o [Ncat][GH#2202] Use safety-checked versions of FD_* macros to abort early
  if number of connections exceeds FD_SETSIZE. [Pavel Zhukov]

o [Ncat] Connections proxied via SOCKS4/SOCKS5 were intermittently dropping
  server data sent right after the connection got established, such as port
  banners. [Sami Pönkänen]

o [Ncat][GH#2149] Fixed a bug in proxy connect mode which would close the
  connection as soon as it was opened in Nmap 7.90 and 7.91.

o [NSE][GH#2175] Fixed NSE so it will not consolidate all port script output
  for targets which share an IP (e.g. HTTP vhosts) under one target. [Daniel
  Miller]

o [Zenmap][GH#2157] Fixed an issue where a failure to execute Nmap would
  result in a Zenmap crash with "TypeError: coercing to Unicode" exception.

o Nmap no longer considers an ICMP Host Unreachable as confirmation that a
  target is down, in accordance with RFC 1122 which says these errors may be
  transient. Instead, the probe will be destroyed and other probes used to
  determine aliveness. [Daniel Miller]

o [Ncat][GH#2154] Ncat no longer crashes when used with Unix domain sockets.

o [Ncat][GH#2167][GH#2168] Ncat is now again generating certificates with
  the duration of one year. Due to a bug, recent versions of Ncat were using
  only one minute. [Tobias Girstmair]

o [NSE][GH#2281] URL/percent-encoding is now using uppercase hex digits to
  align with RFC 3986, section 2.1, and to improve compatibility with some
  real-world web servers. [nnposter]

o [NSE][GH#2174] Script hostmap-crtsh got improved in several ways. The most
  visible are that certificate SANs are properly split apart and that
  identities that are syntactically incorrect to be hostnames are now
  ignored.  [Michel Le Bihan, nnposter]

o [NSE] Loading of a Nikto database failed if the file was referenced
  relative to the Nmap directory [nnposter]

o We're no longer building and distributing 32-bit Linux binary RPMs since
  the vast majority of users are on x64 systems now. Nmap still works on
  32-bit systems and so users can build it themselves from the source
  RPMs or tarball, or obtain it from their distribution's repository. 

o [GH#2199] Updated Nmap's NPSL license to rewrite a poorly-worded clause
  about "proprietary software companies".  The new license version 0.93 is
  still available from https://nmap.org/npsl/. As described on that page, we
  are also still offering Nmap 7.90, 7.91, and 7.92 under the previous Nmap
  7.80 license. Finally, we still offer the Nmap OEM program for companies
  who want a non-copyleft license allowing them to redistribute Nmap with
  their products at https://nmap.org/oem/.

o [NSE] Script smb2-vuln-uptime no longer reports false positives when the
  target does not provide its boot time. [nnposter]

o [NSE][GH#2197] Client packets composed by the DHCP library will now
  contain option 51 (IP address lease time) only when requested. [nnposter]

o [NSE][GH#2192] XML decoding in library citrixxml no longer crashes when
  encountering a character reference with codepoint greater than 255. (These
  references are now left unmodified.) [nnposter]

o [NSE] Script mysql-audit now defaults to the bundled mysql-cis.audit for
  the audit rule base. [nnposter]

o [NSE][GH#1473] It is now possible to control whether the SNMP library uses
  v1 (default) or v2c by setting script argument snmp.version. [nnposter]

Nmap 7.91 [2020-10-09]

o [NSE][GH#2136][GH#2137] Fix several places where Lua's os.time was being used
  to represent dates prior to January 1, 1970, which fails on Windows. Notably,
  NSE refused to run in UTC+X timezones with the error "time result cannot be
  represented in this installation" [Clément Notin, nnposter, Daniel Miller]

o [GH#2148][Zenmap] Fix a crash in the profile editor due to a missing import.

o [GH#2139][Nsock][Windows] Demote the IOCP Nsock engine because of some known
  issues that will take longer to resolve. The previous default "poll" engine
  will be used instead.

o [GH#2140][Nsock][Windows] Fix a crash in service scan due to a previously-unknown
  error being returned from the IOCP Nsock engine. [Daniel Miller]

o [NSE][GH#2128] MySQL library was not properly parsing server responses,
  resulting in script crashes. [nnposter]

o [GH#2135] Silence the irrelevant warning, "Your ports include 'T:' but you
  haven't specified any TCP scan type" when running nmap -sUV

Nmap 7.90 [2020-10-03]

o [Windows] Upgraded Npcap, our Windows packet capturing (and sending)
  library to the milestone 1.00 release! It's the culmination of 7 years of
  development with 170 public pre-releases. This includes dozens of
  performance improvements, bug fixes, and feature enhancements described
  at https://npcap.com/changelog.

o Integrated over 800 service/version detection fingerprints submitted since
  August 2017. The signature count went up 1.8% to 11,878, including 17 new
  softmatches.  We now detect 1237 protocols from airmedia-audio, banner-ivu,
  and control-m to insteon-plm, pi-hole-stats, and ums-webviewer.  A
  significant number of submissions remain to be integrated in the next
  release.

o Integrated over 330 of the most-frequently-submitted IPv4 OS fingerprints
  since August 2017. Added 26 fingerprints, bringing the new total to 5,678.
  Additions include iOS 12 & 13, macOS Catalina & Mojave, Linux 5.4, FreeBSD
  13, and more.

o Integrated all 67 of your IPv6 OS fingerprint submissions from August 2017 to
  September 2020. Added new groups for FreeBSD 12, Linux 5.4, and Windows 10,
  and consolidated several weak groups to improve classification accuracy.

o [NSE] Added 3 NSE scripts, from 2 authors, bringing the total up to 601!
  They are all listed at https://nmap.org/nsedoc/, and the summaries are
  below:

  + dicom-brute attempts to brute force the called Application Entity Title
    of DICOM servers. [Paulino Calderon]

  + dicom-ping discovers DICOM servers and determines if any Application
    Entity Title is allowed to connect. [Paulino Calderon]

  + uptime-agent-info collects system information from an Idera Uptime
    Infrastructure Monitor agent. [Daniel Miller]

o [GH#1834] Addressed over 250 code quality issues identified by LGTM.com,
  improving our code quality score from "C" to "A+"

o Released Npcap OEM Edition. For more than 20 years, the Nmap Project has
  been funded by selling licenses for companies to distribute Nmap with
  their products, along with commercial support. Hundreds of commercial
  products now use Nmap for network discovery tasks like port scanning,
  host discovery, OS detection, service/version detection, and of course
  the Nmap Scripting Engine (NSE). Until now they have just used standard
  Nmap, but this new OEM Edition is customized for use within other Windows
  software. Nmap OEM contains the OEM version of our Npcap driver, which
  allows for silent installation. It also removes the Zenmap GUI, which
  cuts the installer size by more than half. And it reports itself as Nmap
  OEM so customers know it's a properly licensed Nmap. See
  https://nmap.org/oem for more details. We will be reaching out to all
  existing licensees with Nmap OEM access credentials, but any licensees
  who wants it quicker should see https://nmap.org/oem.

o Upgraded the Nmap license form a sort of hacked-up version of GPLv2 to a
  cleaner and better organized version (still based on GPLv2) now called the
  Nmap Public Source License to avoid confusion. See https://nmap.org/npsl/
  for more details and annotated license text. This NPSL project was started
  in 2006 (community discussion here:
  https://seclists.org/nmap-dev/2006/q4/126) and then it lost momentum for 7
  years until it was restarted in 2013
  (https://seclists.org/nmap-dev/2013/q1/399) and then we got distracted by
  development again. We still have some ideas for improving the NPSL, but
  it's already much better than the current license, so we're applying NPSL
  Version 0.92 to the code now and can make improvements later if
  needed. This does not change the license of previous Nmap releases.

o Removed nmap-update. This program was intended to provide a way to update
  data files and NSE scripts, but the infrastructure was never fielded. It
  depended on Subversion version control and would have required maintaining
  separate versions of NSE scripts for compatibility.

o Removed the silent-install command-line option (/S) from the Windows
  installer. It causes several problems and there were no objections when we
  proposed removing it in 2016 (https://seclists.org/nmap-dev/2016/q4/168).
  It will remain in Nmap OEM since its main use was for customers who
  redistribute Nmap with other software. If anyone else has a strong need
  for an Nmap silent installer, please contact sales@nmap.com and we'll see
  what we can do.

o [GH#1860] 23 new UDP payloads and dozens more default ports for existing
  payloads developed for Rapid7's InsightVM scan engine. These speed up and
  ensure detection of open UDP services. [Paul Miseiko, Rapid7]

o [GH#2051] Restrict Nmap's search path for scripts and data files.
  NMAPDATADIR, defined on Unix and Linux as ${prefix}/share/nmap, will not be
  searched on Windows, where it was previously defined as C:\Nmap .
  Additionally, the --script option will not interpret names as directory names
  unless they are followed by a '/'. [Daniel Miller]

o [GH#1764] Fix an assertion failure when unsolicited ARP response is received:
    nmap: Target.cc:503: void Target::stopTimeOutClock(const timeval*): Assertion `htn.toclock_running == true' failed.

o [NSE] New outlib library consolidates functions related to NSE output,
  both string formatting conventions and structured output. [Daniel Miller]

o [NSE] New dicom library implements the DICOM protocol used for
  storing and transfering medical images. [Paulino Calderon]

o [GH#92] Fix a regression in ARP host discovery left over from the move from
  massping to ultra_scan in Nmap 4.22SOC8 (2007) that sometimes resulted in
  missing ARP responses from targets near the end of a scan. Accuracy and speed
  are both improved. [Daniel Miller]

o [GH#2126] Fix the "iocp" Nsock engine for Windows to be able to correctly
  handle PCAP read events. This engine is now the default for Windows, which
  should greatly improve performance over the previous default, the "poll"
  engine. [Daniel Miller]

o [GH#2050] Reduced CPU usage of OS scan by 50% by avoiding string copy
  operations and removing undocumented fingerprint syntax unused in nmap-os-db
  ('&' and '+' in expressions). [Daniel Miller]

o [GH#1859] Allow multiple UDP payloads to be specified for a port in
  nmap-payloads. If the first payload does not get a response, the remaining
  payloads are tried round-robin. [Paul Miseiko, Rapid7]

o [GH#1616] New option --discovery-ignore-rst tells Nmap to ignore TCP RST
  responses when determining if a target is up. Useful when firewalls are
  spoofing RST packets. [Tom Sellers, Rapid7]

o [Ncat][GH#2087][GH#1927][GH#1928][GH#1974] It is now possible to override
  the value of TLS SNI via --ssl-servername [Hank Leininger, nnposter]

o [GH#2104] Fixed parsing of TCP options which would hang (infinite loop) if an
  option had an explicit length of 0. Affects Nmap 7.80 only.
  [Daniel Miller, Imed Mnif]

o Added a UDP payload for STUN (Session Traversal Utilities for NAT).
  [David Fifield]

o [NSE] Fixed an off-by-one bug in the stun.lua library that prevented
  parsing a server response. [David Fifield]

o [NSE][GH#1460] Script ssh2-enum-algos would fail if the server initiated
  the key exchange before completing the protocol version exchange
  [Scott Ellis, nnposter]

o [NSE][GH#2105] Fetching of SSH2 keys might fail because of key exchange
  confusion [nnposter]

o [NSE][GH#2098] Performance of script afp-ls has been dramatically improved
  [nnposter]

o [NSE][GH#2091] Parsing of AFP FPGetFileDirParms and
  FPEnumerateExt2FPEnumerateExt2 responses was not working correctly [nnposter]

o [NSE][GH#2089] Eliminated false positives in script http-shellshock caused by
  simple reflection of HTTP request data [Anders Kaseorg]

o [NSE][GH#1473] SNMP scripts are now enabled on non-standard ports where SNMP
  has been detected [usd-markus, nnposter]

o [NSE][GH#2084] MQTT library was using incorrect position when parsing
  received responses [tatulea]

o [NSE][GH#2086] IPMI library was using incorrect position when parsing
  received responses [Star Salzman]

o [NSE][GH#2086] Scripts ipmi-brute and deluge-rpc-brute were not capturing
  successfully brute-forced credentials [Star Salzman]

o Allow resuming IPv6 scans with --resume. The address parsing was assuming IPv4
  addresses, leading to "Unable to parse ip" error. In a related fix, MAC addresses
  will not be parsed as IP addresses when resuming from XML. [Daniel Miller]

o [GH#1622][GH#2068] Fix reverse-DNS handling of PTR records that are not lowercase.
  Nmap was failing to identify reverse-DNS names when the DNS server delivered
  them like ".IN-ADDR.ARPA". [Lucas Nussbaum, Richard Schütz, Daniel Miller]

o [NSE][GH#1999][GH#2005] IKE library was not properly populating the protocol
  number in aggressive mode requests. [luc-x41]

o [GH#1963] Added service fingerprinting for MySQL 8.x, Microsoft SQL
  Server 2019, MariaDB, and Crate.io CrateDB. Updated PostreSQL coverage and
  added specific detection of recent versions running in Docker. [Tom Sellers]

o New XML output "hosthint" tag emitted during host discovery when a target is
  found to be up. This gives earlier notification than waiting for the
  hostgroup to finish all scan phases. [Paul Miseiko]

o [GH#917] New UDP payloads for GPRS Tunneling Protocol (GTP) on ports 2123,
  2152, and 3386. [Guillaume Teissier]

o [NSE][GH#1825] SSH scripts now run on several ports likely to be SSH based on
  empirical data from Shodan.io, as well as the netconf-ssh service.
  [Lim Shi Min Jonathan, Daniel Miller]

o [Zenmap][GH#1777] Stop creating a debugging output file 'tmp.txt' on the
  desktop in macOS. [Roland Linder]

o [Nping] Address build failure under libc++ due to "using namespace std;" in
  several headers, resulting in conflicting definitions of bind(). Reported by
  StormBytePP and Rosen Penev. [Daniel Miller]

o [Ncat][GH#1868] Fix a fatal error when connecting to a Linux VM socket with
  verbose output enabled. [Stefano Garzarella]

o [Ncat][GH#2060] Proxy credentials can be alternatively passed onto Ncat by
  setting environment variable NCAT_PROXY_AUTH, which reduces the risk of the
  credentials getting captured in process logs. [nnposter]

