Linksys WRT120N tmUnblock Stack Buffer Overflow - Metasploit
This page contains detailed information about how to use the auxiliary/admin/http/linksys_tmunblock_admin_reset_bof metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Linksys WRT120N tmUnblock Stack Buffer Overflow
Module: auxiliary/admin/http/linksys_tmunblock_admin_reset_bof
Source code: modules/auxiliary/admin/http/linksys_tmunblock_admin_reset_bof.rb
Disclosure date: 2014-02-19
Last modification time: 2022-01-23 15:28:32 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: -
This module exploits a stack-based buffer overflow vulnerability in the WRT120N Linksys router to reset the password of the management interface temporarily to an empty value. This module has been tested successfully on a WRT120N device with firmware version 1.0.07.
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/admin/http/linksys_tmunblock_admin_reset_bof
msf auxiliary(linksys_tmunblock_admin_reset_bof) > show targets
... a list of targets ...
msf auxiliary(linksys_tmunblock_admin_reset_bof) > set TARGET target-id
msf auxiliary(linksys_tmunblock_admin_reset_bof) > show options
... show and set options ...
msf auxiliary(linksys_tmunblock_admin_reset_bof) > exploit
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
Go back to menu.
Msfconsole Usage
Here is how the admin/http/linksys_tmunblock_admin_reset_bof auxiliary module looks in the msfconsole:
msf6 > use auxiliary/admin/http/linksys_tmunblock_admin_reset_bof
msf6 auxiliary(admin/http/linksys_tmunblock_admin_reset_bof) > show info
Name: Linksys WRT120N tmUnblock Stack Buffer Overflow
Module: auxiliary/admin/http/linksys_tmunblock_admin_reset_bof
License: Metasploit Framework License (BSD)
Rank: Normal
Disclosed: 2014-02-19
Provided by:
Craig Heffner
Michael Messner <[email protected]>
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 80 yes The target port (TCP)
SSL false no Negotiate SSL/TLS for outgoing connections
VHOST no HTTP server virtual host
Description:
This module exploits a stack-based buffer overflow vulnerability in
the WRT120N Linksys router to reset the password of the management
interface temporarily to an empty value. This module has been tested
successfully on a WRT120N device with firmware version 1.0.07.
References:
https://www.exploit-db.com/exploits/31758
OSVDB (103521)
http://www.devttys0.com/2014/02/wrt120n-fprintf-stack-overflow/
Module Options
This is a complete list of options available in the admin/http/linksys_tmunblock_admin_reset_bof auxiliary module:
msf6 auxiliary(admin/http/linksys_tmunblock_admin_reset_bof) > show options
Module options (auxiliary/admin/http/linksys_tmunblock_admin_reset_bof):
Name Current Setting Required Description
---- --------------- -------- -----------
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 80 yes The target port (TCP)
SSL false no Negotiate SSL/TLS for outgoing connections
VHOST no HTTP server virtual host
Advanced Options
Here is a complete list of advanced options supported by the admin/http/linksys_tmunblock_admin_reset_bof auxiliary module:
msf6 auxiliary(admin/http/linksys_tmunblock_admin_reset_bof) > show advanced
Module advanced options (auxiliary/admin/http/linksys_tmunblock_admin_reset_bof):
Name Current Setting Required Description
---- --------------- -------- -----------
DOMAIN WORKSTATION yes The domain to use for Windows authentication
DigestAuthIIS true no Conform to IIS, should work for most servers. Only set to false for non-IIS servers
FingerprintCheck true no Conduct a pre-exploit fingerprint verification
HttpClientTimeout no HTTP connection and receive timeout
HttpPassword no The HTTP password to specify for authentication
HttpRawHeaders no Path to ERB-templatized raw headers to append to existing headers
HttpTrace false no Show the raw HTTP requests and responses
HttpTraceColors red/blu no HTTP request and response colors for HttpTrace (unset to disable)
HttpTraceHeadersOnly false no Show HTTP headers only in HttpTrace
HttpUsername no The HTTP username to specify for authentication
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)
UserAgent Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) no The User-Agent header to use for all requests
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 admin/http/linksys_tmunblock_admin_reset_bof module can do:
msf6 auxiliary(admin/http/linksys_tmunblock_admin_reset_bof) > show actions
Auxiliary actions:
Name Description
---- -----------
Evasion Options
Here is the full list of possible evasion options supported by the admin/http/linksys_tmunblock_admin_reset_bof auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 auxiliary(admin/http/linksys_tmunblock_admin_reset_bof) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
HTTP::header_folding false no Enable folding of HTTP headers
HTTP::method_random_case false no Use random casing for the HTTP method
HTTP::method_random_invalid false no Use a random invalid, HTTP method for request
HTTP::method_random_valid false no Use a random, but valid, HTTP method for request
HTTP::pad_fake_headers false no Insert random, fake headers into the HTTP request
HTTP::pad_fake_headers_count 0 no How many fake headers to insert into the HTTP request
HTTP::pad_get_params false no Insert random, fake query string variables into the request
HTTP::pad_get_params_count 16 no How many fake query string variables to insert into the request
HTTP::pad_method_uri_count 1 no How many whitespace characters to use between the method and uri
HTTP::pad_method_uri_type space no What type of whitespace to use between the method and uri (Accepted: space, tab, apache)
HTTP::pad_post_params false no Insert random, fake post variables into the request
HTTP::pad_post_params_count 16 no How many fake post variables to insert into the request
HTTP::pad_uri_version_count 1 no How many whitespace characters to use between the uri and version
HTTP::pad_uri_version_type space no What type of whitespace to use between the uri and version (Accepted: space, tab, apache)
HTTP::uri_dir_fake_relative false no Insert fake relative directories into the uri
HTTP::uri_dir_self_reference false no Insert self-referential directories into the uri
HTTP::uri_encode_mode hex-normal no Enable URI encoding (Accepted: none, hex-normal, hex-noslashes, hex-random, hex-all, u-normal, u-all, u-random)
HTTP::uri_fake_end false no Add a fake end of URI (eg: /%20HTTP/1.0/../../)
HTTP::uri_fake_params_start false no Add a fake start of params to the URI (eg: /%3fa=b/../)
HTTP::uri_full_url false no Use the full URL for all HTTP requests
HTTP::uri_use_backslashes false no Use back slashes instead of forward slashes in the uri
HTTP::version_random_invalid false no Use a random invalid, HTTP version for request
HTTP::version_random_valid false no Use a random, but valid, HTTP version for request
Go back to menu.
Error Messages
This module may fail with the following 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.
No login possible with <USER> and empty password
Here is a relevant code snippet related to the "No login possible with <USER> and empty password" error message:
36: 'uri' => '/',
37: 'method' => 'GET',
38: 'authorization' => basic_auth(user,"")
39: })
40: if res.nil? || res.code == 404
41: print_status("No login possible with #{user} and empty password")
42: return false
43: elsif [200, 301, 302].include?(res.code)
44: print_good("Successful login #{user} and empty password")
45: return true
46: else
No login possible with <USER> and empty password
Here is a relevant code snippet related to the "No login possible with <USER> and empty password" error message:
42: return false
43: elsif [200, 301, 302].include?(res.code)
44: print_good("Successful login #{user} and empty password")
45: return true
46: else
47: print_status("No login possible with #{user} and empty password")
48: return false
49: end
50: end
51:
52: def run
Failed to connect to the web server
Here is a relevant code snippet related to the "Failed to connect to the web server" error message:
55: if check_login("admin")
56: print_good("login with user admin and no password possible. There is no need to use this module.")
57: return
58: end
59: rescue ::Rex::ConnectionError
60: print_error("Failed to connect to the web server")
61: return
62: end
63:
64: print_status("Resetting password for the admin user ...")
65:
Unexpected answer. Exploit attempt has failed
Here is a relevant code snippet related to the "Unexpected answer. Exploit attempt has failed" error message:
94: print_good("Expected answer and the login was successful. Try to login with the user admin and a blank password")
95: else
96: print_status("Expected answer, but unknown exploit status. Try to login with the user admin and a blank password")
97: end
98: else
99: print_error("Unexpected answer. Exploit attempt has failed")
100: end
101: rescue ::Rex::ConnectionError
102: print_error("Failed to connect to the web server")
103: return
104: end
Failed to connect to the web server
Here is a relevant code snippet related to the "Failed to connect to the web server" error message:
96: print_status("Expected answer, but unknown exploit status. Try to login with the user admin and a blank password")
97: end
98: else
99: print_error("Unexpected answer. Exploit attempt has failed")
100: end
101: rescue ::Rex::ConnectionError
102: print_error("Failed to connect to the web server")
103: return
104: end
105: end
106: end
Go back to menu.
Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #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
- #6526 Merged Pull Request: Peers for the peer god
- #5059 Merged Pull Request: Yard doc corrections
- #3056 Merged Pull Request: Pre-release fixups: Minor description/print_* cleanup and finger-wagging about a for loop
- #3023 Merged Pull Request: WRT120N v1.0.0.7 stack overflow, ROP to 4-byte overwrite which clears the admin password - by Craig Heffner
References
- CVE: Not available
- EDB-31758
- OSVDB (103521)
- http://www.devttys0.com/2014/02/wrt120n-fprintf-stack-overflow/
See Also
Check also the following modules related to this module:
- auxiliary/admin/http/linksys_e1500_e2500_exec
- auxiliary/admin/http/linksys_wrt54gl_exec
- auxiliary/scanner/http/linksys_e1500_traversal
- exploit/linux/http/linksys_apply_cgi
- exploit/linux/http/linksys_e1500_apply_exec
- exploit/linux/http/linksys_themoon_exec
- exploit/linux/http/linksys_wrt110_cmd_exec
- exploit/linux/http/linksys_wrt160nv2_apply_exec
- exploit/linux/http/linksys_wrt54gl_apply_exec
- exploit/linux/http/linksys_wvbr0_user_agent_exec_noauth
- auxiliary/dos/http/novell_file_reporter_heap_bof
- auxiliary/dos/windows/ftp/iis75_ftpd_iac_bof
- auxiliary/admin/http/cfme_manageiq_evm_pass_reset
- auxiliary/admin/http/hikvision_unauth_pwd_reset_cve_2017_7921
- auxiliary/admin/http/intersil_pass_reset
- auxiliary/admin/http/mantisbt_password_reset
- auxiliary/admin/http/netgear_r6700_pass_reset
- auxiliary/admin/http/nuuo_nvrmini_reset
- auxiliary/admin/http/rails_devise_pass_reset
- auxiliary/admin/2wire/xslt_password_reset
- auxiliary/admin/chromecast/chromecast_reset
- auxiliary/scanner/http/bmc_trackit_passwd_reset
- auxiliary/scanner/http/epmp1000_reset_pass
- post/hardware/automotive/ecu_hard_reset
Authors
- Craig Heffner
- Michael Messner <devnull[at]s3cur1ty.de>
Version
This page has been produced using Metasploit Framework version 6.2.23-dev. For more modules, visit the Metasploit Module Library.
Go back to menu.