Microsoft Windows DNSAPI.dll LLMNR Buffer Underrun DoS - Metasploit


This page contains detailed information about how to use the auxiliary/dos/windows/llmnr/ms11_030_dnsapi metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Table Of Contents
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Module Overview

Name: Microsoft Windows DNSAPI.dll LLMNR Buffer Underrun DoS
Module: auxiliary/dos/windows/llmnr/ms11_030_dnsapi
Source code: modules/auxiliary/dos/windows/llmnr/ms11_030_dnsapi.rb
Disclosure date: 2011-04-12
Last modification time: 2017-07-24 06:26:21 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): 5355
List of CVEs: CVE-2011-0657

This module exploits a buffer underrun vulnerability in Microsoft's DNSAPI.dll as distributed with Windows Vista and later without KB2509553. By sending a specially crafted LLMNR query, containing a leading '.' character, an attacker can trigger stack exhaustion or potentially cause stack memory corruption. Although this vulnerability may lead to code execution, it has not been proven to be possible at the time of this writing. NOTE: In some circumstances, a '.' may be found before the top of the stack is reached. In these cases, this module may not be able to cause a crash.

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/windows/llmnr/ms11_030_dnsapi
msf auxiliary(ms11_030_dnsapi) > show targets
    ... a list of targets ...
msf auxiliary(ms11_030_dnsapi) > set TARGET target-id
msf auxiliary(ms11_030_dnsapi) > show options
    ... show and set options ...
msf auxiliary(ms11_030_dnsapi) > exploit

Go back to menu.

Msfconsole Usage

Here is how the dos/windows/llmnr/ms11_030_dnsapi auxiliary module looks in the msfconsole:

msf6 > use auxiliary/dos/windows/llmnr/ms11_030_dnsapi

msf6 auxiliary(dos/windows/llmnr/ms11_030_dnsapi) > show info

       Name: Microsoft Windows DNSAPI.dll LLMNR Buffer Underrun DoS
     Module: auxiliary/dos/windows/llmnr/ms11_030_dnsapi
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2011-04-12

Provided by:
  jduck <[email protected]>

Check supported:
  No

Basic options:
  Name    Current Setting  Required  Description
  ----    ---------------  --------  -----------
  RHOSTS  224.0.0.252      yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT   5355             yes       The target port (UDP)

Description:
  This module exploits a buffer underrun vulnerability in Microsoft's 
  DNSAPI.dll as distributed with Windows Vista and later without 
  KB2509553. By sending a specially crafted LLMNR query, containing a 
  leading '.' character, an attacker can trigger stack exhaustion or 
  potentially cause stack memory corruption. Although this 
  vulnerability may lead to code execution, it has not been proven to 
  be possible at the time of this writing. NOTE: In some 
  circumstances, a '.' may be found before the top of the stack is 
  reached. In these cases, this module may not be able to cause a 
  crash.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2011-0657
  OSVDB (71780)
  https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2011/MS11-030

Module Options

This is a complete list of options available in the dos/windows/llmnr/ms11_030_dnsapi auxiliary module:

msf6 auxiliary(dos/windows/llmnr/ms11_030_dnsapi) > show options

Module options (auxiliary/dos/windows/llmnr/ms11_030_dnsapi):

   Name    Current Setting  Required  Description
   ----    ---------------  --------  -----------
   RHOSTS  224.0.0.252      yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT   5355             yes       The target port (UDP)

Advanced Options

Here is a complete list of advanced options supported by the dos/windows/llmnr/ms11_030_dnsapi auxiliary module:

msf6 auxiliary(dos/windows/llmnr/ms11_030_dnsapi) > show advanced

Module advanced options (auxiliary/dos/windows/llmnr/ms11_030_dnsapi):

   Name       Current Setting  Required  Description
   ----       ---------------  --------  -----------
   CHOST                       no        The local client address
   CPORT                       no        The local client port
   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/windows/llmnr/ms11_030_dnsapi module can do:

msf6 auxiliary(dos/windows/llmnr/ms11_030_dnsapi) > show actions

Auxiliary actions:

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

Evasion Options

Here is the full list of possible evasion options supported by the dos/windows/llmnr/ms11_030_dnsapi auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(dos/windows/llmnr/ms11_030_dnsapi) > show evasion

Module evasion options:

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------

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References

See Also

Check also the following modules related to this module:

Authors

jduck

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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