DNS Record Scanner and Enumerator - Metasploit
This page contains detailed information about how to use the auxiliary/gather/enum_dns metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: DNS Record Scanner and Enumerator
Module: auxiliary/gather/enum_dns
Source code: modules/auxiliary/gather/enum_dns.rb
Disclosure date: -
Last modification time: 2020-09-22 02:56:51 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: dns
Target network port(s): 53
List of CVEs: CVE-1999-0532
This module can be used to gather information about a domain from a given DNS server by performing various DNS queries such as zone transfers, reverse lookups, SRV record brute forcing, and other techniques.
Module Ranking and Traits
Module Ranking:
- normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.
Basic Usage
msf > use auxiliary/gather/enum_dns
msf auxiliary(enum_dns) > show targets
... a list of targets ...
msf auxiliary(enum_dns) > set TARGET target-id
msf auxiliary(enum_dns) > show options
... show and set options ...
msf auxiliary(enum_dns) > exploit
Required Options
- DOMAIN: The target domain
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Msfconsole Usage
Here is how the gather/enum_dns auxiliary module looks in the msfconsole:
msf6 > use auxiliary/gather/enum_dns
msf6 auxiliary(gather/enum_dns) > show info
Name: DNS Record Scanner and Enumerator
Module: auxiliary/gather/enum_dns
License: Metasploit Framework License (BSD)
Rank: Normal
Provided by:
Carlos Perez <[email protected]>
Nixawk
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
DOMAIN yes The target domain
ENUM_A true yes Enumerate DNS A record
ENUM_AXFR true yes Initiate a zone transfer against each NS record
ENUM_BRT false yes Brute force subdomains and hostnames via the supplied wordlist
ENUM_CNAME true yes Enumerate DNS CNAME record
ENUM_MX true yes Enumerate DNS MX record
ENUM_NS true yes Enumerate DNS NS record
ENUM_RVL false yes Reverse lookup a range of IP addresses
ENUM_SOA true yes Enumerate DNS SOA record
ENUM_SRV true yes Enumerate the most common SRV records
ENUM_TLD false yes Perform a TLD expansion by replacing the TLD with the IANA TLD list
ENUM_TXT true yes Enumerate DNS TXT record
IPRANGE no The target address range or CIDR identifier
NS no Specify the nameservers to use for queries, space separated
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RPORT 53 yes The target port (TCP)
SEARCHLIST no DNS domain search list, comma separated
STOP_WLDCRD false yes Stops bruteforce enumeration if wildcard resolution is detected
THREADS 1 no Threads for ENUM_BRT
WORDLIST /opt/metasploit-framework/embedded/framework/data/wordlists/namelist.txt no Wordlist of subdomains
Description:
This module can be used to gather information about a domain from a
given DNS server by performing various DNS queries such as zone
transfers, reverse lookups, SRV record brute forcing, and other
techniques.
References:
https://nvd.nist.gov/vuln/detail/CVE-1999-0532
OSVDB (492)
Module Options
This is a complete list of options available in the gather/enum_dns auxiliary module:
msf6 auxiliary(gather/enum_dns) > show options
Module options (auxiliary/gather/enum_dns):
Name Current Setting Required Description
---- --------------- -------- -----------
DOMAIN yes The target domain
ENUM_A true yes Enumerate DNS A record
ENUM_AXFR true yes Initiate a zone transfer against each NS record
ENUM_BRT false yes Brute force subdomains and hostnames via the supplied wordlist
ENUM_CNAME true yes Enumerate DNS CNAME record
ENUM_MX true yes Enumerate DNS MX record
ENUM_NS true yes Enumerate DNS NS record
ENUM_RVL false yes Reverse lookup a range of IP addresses
ENUM_SOA true yes Enumerate DNS SOA record
ENUM_SRV true yes Enumerate the most common SRV records
ENUM_TLD false yes Perform a TLD expansion by replacing the TLD with the IANA TLD list
ENUM_TXT true yes Enumerate DNS TXT record
IPRANGE no The target address range or CIDR identifier
NS no Specify the nameservers to use for queries, space separated
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RPORT 53 yes The target port (TCP)
SEARCHLIST no DNS domain search list, comma separated
STOP_WLDCRD false yes Stops bruteforce enumeration if wildcard resolution is detected
THREADS 1 no Threads for ENUM_BRT
WORDLIST /opt/metasploit-framework/embedded/framework/data/wordlists/namelist.txt no Wordlist of subdomains
Advanced Options
Here is a complete list of advanced options supported by the gather/enum_dns auxiliary module:
msf6 auxiliary(gather/enum_dns) > show advanced
Module advanced options (auxiliary/gather/enum_dns):
Name Current Setting Required Description
---- --------------- -------- -----------
CHOST no The local client address
CPORT no The local client port
ConnectTimeout 10 yes Maximum number of seconds to establish a TCP connection
DnsClientDefaultNS 8.8.8.8 8.8.4.4 no Specify the default to use for queries, space separated
DnsClientRVLExistingOnly true no Only perform lookups on hosts in DB
DnsClientReportARecords true no Add hosts found via BRT and RVL to DB
DnsClientResolvconf /dev/null yes Resolvconf formatted configuration file to use for Resolver
DnsNote true no Save all DNS results as notes
RETRY 2 no Number of times to try to resolve a record if no response is received
RETRY_INTERVAL 2 no Number of seconds to wait before doing a retry
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCipher no String for SSL cipher - "DHE-RSA-AES256-SHA" or "ADH"
SSLVerifyMode PEER no SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
SSLVersion Auto yes Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
TCP_DNS false no Run queries over TCP
TIMEOUT 8 no DNS TIMEOUT
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Auxiliary Actions
This is a list of all auxiliary actions that the gather/enum_dns module can do:
msf6 auxiliary(gather/enum_dns) > show actions
Auxiliary actions:
Name Description
---- -----------
Evasion Options
Here is the full list of possible evasion options supported by the gather/enum_dns auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 auxiliary(gather/enum_dns) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
TCP::max_send_size 0 no Maxiumum tcp segment size. (0 = disable)
TCP::send_delay 0 no Delays inserted before every send. (0 = disable)
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Error Messages
This module may fail with the following error messages:
Error Messages
Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.
Resolver setup failed - exception: <E>
Here is a relevant code snippet related to the "Resolver setup failed - exception: <E>" error message:
62: datastore['DnsClientTcpDns'] = datastore['TCP_DNS']
63:
64: begin
65: setup_resolver
66: rescue RuntimeError => e
67: fail_with(Failure::BadConfig, "Resolver setup failed - exception: #{e}")
68: end
69:
70: domain = datastore['DOMAIN']
71: is_wildcard = dns_wildcard_enabled?(domain)
72:
AXFR failed: <E>
Here is a relevant code snippet related to the "AXFR failed: <E>" error message:
73: # All exceptions should be being handled by the library
74: # but catching here as well, just in case.
75: begin
76: dns_axfr(domain) if datastore['ENUM_AXFR']
77: rescue => e
78: print_error("AXFR failed: #{e}")
79: end
80: dns_get_a(domain) if datastore['ENUM_A']
81: dns_get_cname(domain) if datastore['ENUM_CNAME']
82: dns_get_ns(domain) if datastore['ENUM_NS']
83: dns_get_mx(domain) if datastore['ENUM_MX']
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Related Pull Requests
- #14202 Merged Pull Request: Implement the zeitwerk autoloader within lib/msf/core
- #14323 Merged Pull Request: Use the datastore nameservers when doing zone transfers when set
- #14250 Merged Pull Request: Fix up the DNS enumeration library so that AXFR records aren't displayed with stray [ and ] characters
- #13975 Merged Pull Request: Fixes for bug #13956
- #12234 Merged Pull Request: add. new gather module cloud_lookup
- #13406 Merged Pull Request: Fix multiple DNS enumeration related bugs
- #10317 Merged Pull Request: Check if IPRANGE was supplied - Fix #10316
- #8716 Merged Pull Request: Print_Status -> Print_Good (And OCD bits 'n bobs)
- #8338 Merged Pull Request: Fix msf/core and self.class msftidy warnings
- #6812 Merged Pull Request: Resolve #6807, remove all OSVDB references.
- #6655 Merged Pull Request: use MetasploitModule as a class name
- #6648 Merged Pull Request: Change metasploit class names
References
- CVE-1999-0532
- OSVDB (492)
See Also
Check also the following modules related to this module:
- auxiliary/cloud/aws/enum_ec2
- auxiliary/cloud/aws/enum_iam
- auxiliary/cloud/aws/enum_s3
- auxiliary/cloud/kubernetes/enum_kubernetes
- auxiliary/scanner/http/enum_wayback
- auxiliary/gather/hp_enum_perfd
- auxiliary/gather/ibm_bigfix_sites_packages_enum
- auxiliary/gather/ibm_sametime_enumerate_users
- auxiliary/gather/kerberos_enumusers
- auxiliary/gather/manageengine_adaudit_plus_xnode_enum
- auxiliary/gather/manageengine_datasecurity_plus_xnode_enum
- auxiliary/gather/mongodb_js_inject_collection_enum
- auxiliary/gather/office365userenum
- auxiliary/admin/dns/dyn_dns_update
- auxiliary/dos/dns/bind_tkey
- auxiliary/dos/dns/bind_tsig
- auxiliary/dos/dns/bind_tsig_badtime
- auxiliary/fuzzers/dns/dns_fuzzer
- auxiliary/scanner/dns/dns_amp
- auxiliary/server/dns/native_server
- auxiliary/server/dns/spoofhelper
- auxiliary/spoof/dns/bailiwicked_domain
- auxiliary/spoof/dns/bailiwicked_host
- auxiliary/spoof/dns/compare_results
- auxiliary/spoof/dns/native_spoofer
- auxiliary/vsploit/malware/dns/dns_mariposa
- auxiliary/vsploit/malware/dns/dns_query
- auxiliary/vsploit/malware/dns/dns_zeus
- auxiliary/dos/mdns/avahi_portzero
- auxiliary/dos/windows/llmnr/ms11_030_dnsapi
- auxiliary/scanner/mdns/query
- auxiliary/server/fakedns
- auxiliary/spoof/mdns/mdns_response
Authors
- Carlos Perez <carlos_perez[at]darkoperator.com>
- Nixawk
Version
This page has been produced using Metasploit Framework version 6.2.23-dev. For more modules, visit the Metasploit Module Library.
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