HTTP Git Scanner

`##  
# 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  
include Msf::Auxiliary::Scanner  
include Msf::Auxiliary::Report  
  
def initialize  
super(  
'Name' => 'HTTP Git Scanner',  
'Description' => %q(  
This module can detect situations where there may be information  
disclosure vulnerabilities that occur when a Git repository is made  
available over HTTP.  
),  
'Author' => [  
'Nixawk', # module developer  
'Jon Hart <jon_hart[at]rapid7.com>' # improved metasploit module  
],  
'References' => [  
['URL', 'https://github.com/git/git/blob/master/Documentation/technical/index-format.txt']  
],  
'License' => MSF_LICENSE  
)  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The test path to .git directory', '/.git/']),  
OptBool.new('GIT_INDEX', [true, 'Check index file in .git directory', true]),  
OptBool.new('GIT_CONFIG', [true, 'Check config file in .git directory', true]),  
OptString.new('UserAgent', [ true, 'The HTTP User-Agent sent in the request', 'git/1.7.9.5' ])  
]  
)  
end  
  
def req(filename)  
send_request_cgi(  
'uri' => normalize_uri(target_uri, filename)  
)  
end  
  
def git_index_parse(resp)  
return if resp.blank? || resp.length < 12 # A 12-byte header  
signature = resp[0, 4]  
return unless signature == 'DIRC'  
  
version = resp[4, 4].unpack('N')[0].to_i  
entries_count = resp[8, 4].unpack('N')[0].to_i  
  
return unless version && entries_count  
[version, entries_count]  
end  
  
def git_index  
res = req('index')  
index_uri = git_uri('index')  
unless res  
vprint_error("#{index_uri} - No response received")  
return  
end  
vprint_status("#{index_uri} - HTTP/#{res.proto} #{res.code} #{res.message}")  
  
return unless res.code == 200  
version, count = git_index_parse(res.body)  
return unless version && count  
print_good("#{full_uri} - git repo (version #{version}) found with #{count} files")  
  
report_note(  
host: rhost,  
port: rport,  
proto: 'tcp',  
type: 'git_index_disclosure',  
data: { uri: index_uri, version: version, entries_count: count }  
)  
end  
  
def git_config  
res = req('config')  
config_uri = git_uri('config')  
unless res  
vprint_error("#{config_uri} - No response received")  
return  
end  
vprint_status("#{config_uri} - HTTP/#{res.proto} #{res.code} #{res.message}")  
  
return unless res.code == 200 && res.body =~ /\[(?:branch|core|remote)\]/  
print_good("#{config_uri} - git config file found")  
  
report_note(  
host: rhost,  
port: rport,  
proto: 'tcp',  
type: 'git_config_disclosure',  
data: { uri: config_uri }  
)  
  
path = store_loot('config', 'text/plain', rhost, res.body, config_uri)  
print_good("Saved file to: #{path}")  
end  
  
def git_uri(path)  
full_uri =~ %r{/$} ? "#{full_uri}#{path}" : "#{full_uri}/#{path}"  
end  
  
def run_host(_target_host)  
vprint_status("#{full_uri} - scanning git disclosure")  
git_index if datastore['GIT_INDEX']  
git_config if datastore['GIT_CONFIG']  
end  
end  
`