Microsoft IIS webhits.dll Hit-Highlighting Authentication Bypass - Nessus

Medium   Plugin ID: 31648

This page contains detailed information about the Microsoft IIS webhits.dll Hit-Highlighting Authentication Bypass Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

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Plugin Overview

ID: 31648
Name: Microsoft IIS webhits.dll Hit-Highlighting Authentication Bypass
Filename: iis_htw_auth_bypass.nasl
Vulnerability Published: N/A
This Plugin Published: 2008-03-25
Last Modification Time: 2018-07-12
Plugin Version: 1.16
Plugin Type: remote
Plugin Family: Web Servers
Dependencies: http_version.nasl
Required KB Items [?]: www/iis

Vulnerability Information

Severity: Medium
Vulnerability Published: N/A
Patch Published: N/A
CVE [?]: CVE-2007-2815
CPE [?]: cpe:/a:microsoft:iis

Synopsis

The remote web server contains a module which may allow an attacker to bypass authentication.

Description

The remote IIS web server contains a vulnerability in the Server Hit Hilight Module which may allow an attacker to view the contents of a page otherwise requiring authentication.

An attacker may exploit this flaw to bypass authentication on certain pages.

Solution

Upgrade to IIS 6

Public Exploits

Target Network Port(s): 80
Target Asset(s): Services/www
Exploit Available: True (Exploit-DB)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Microsoft IIS webhits.dll Hit-Highlighting Authentication Bypass vulnerability:

  1. Exploit-DB: exploits/windows/remote/4016.sh
    [EDB-4016: Microsoft IIS 5.1 - Hit Highlighting Authentication Bypass]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:M/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C
CVSS Base Score:4.3 (Medium)
Impact Subscore:2.9
Exploitability Subscore:8.6
CVSS Temporal Score:3.4 (Low)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:3.4 (Low)

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Plugin Source

This is the iis_htw_auth_bypass.nasl nessus plugin source code. This script is Copyright (C) 2008-2018 Tenable Network Security, Inc. 

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if(description)
{
 script_id(31648);
 script_bugtraq_id(24105);
 script_cve_id("CVE-2007-2815");
 script_version ("1.16");

 script_name(english: "Microsoft IIS webhits.dll Hit-Highlighting Authentication Bypass");
 
 script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a module which may allow an attacker to
bypass authentication." );
 script_set_attribute(attribute:"description", value:
"The remote IIS web server contains a vulnerability in the Server Hit
Hilight Module which may allow an attacker to view the contents of a
page otherwise requiring authentication. 

An attacker may exploit this flaw to bypass authentication on certain
pages." );
 script_set_attribute(attribute:"solution", value:
"Upgrade to IIS 6" );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
 script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
 script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
 script_set_attribute(attribute:"exploit_available", value:"true");
 script_cwe_id(264);
 script_set_attribute(attribute:"plugin_publication_date", value: "2008/03/25");
 script_cvs_date("Date: 2018/07/12 19:01:16");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:iis");
script_end_attributes();


 script_summary(english: "Uses the results of webmirror.nasl");
 script_category(ACT_GATHER_INFO); 
 
 script_copyright(english:"This script is Copyright (C) 2008-2018 Tenable Network Security, Inc.");
 script_family(english: "Web Servers");
 script_dependencie("http_version.nasl");
 script_require_ports("Services/www",80);
 script_require_keys("www/iis");
 exit(0);
}

include("global_settings.inc");
include("misc_func.inc");
include("http.inc");

port = get_http_port(default:80);
banner = get_http_banner(port:port);
if ( "IIS/5" >!< banner && "IIS/4" >!< banner ) exit(0);
list = get_kb_list("www/" + port + "/content/extensions/htw");
if ( isnull(list) ) exit(0);
list = make_list(list);
auth = get_kb_list("www/" + port + "/content/auth_required");
if ( isnull(auth) ) exit(0);
auth = make_list(auth);

list = make_list(list);
foreach item ( list )
{
  file = item + "?CiWebhitsfile=" + auth[0] + "&CiRestriction=e&CiHiliteType=full";
  w = http_send_recv3(method:"GET", item:file, port:80);
  if (isnull(w)) exit(1, "the web server did not answer");
  res = strcat(w[0], w[1], '\r\n', w[2]);
  if (  "<!-- The highlighted summaries are printed here -->" >< res )
	{
		security_warning(port:port,extra:'\nIt is possible to read ' + auth[0] + ' by requesting :\n\n' + file );
		exit(0);
	}
}

The latest version of this script can be found in these locations depending on your platform:

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/iis_htw_auth_bypass.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\iis_htw_auth_bypass.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/iis_htw_auth_bypass.nasl

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How to Run

Here is how to run the Microsoft IIS webhits.dll Hit-Highlighting Authentication Bypass as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Web Servers plugin family.
  6. On the right side table select Microsoft IIS webhits.dll Hit-Highlighting Authentication Bypass plugin ID 31648.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl iis_htw_auth_bypass.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a iis_htw_auth_bypass.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - iis_htw_auth_bypass.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state iis_htw_auth_bypass.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID: CWE | Common Weakness Enumeration:
  • CWE-264 (Category) Permissions, Privileges, and Access Controls
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  • 49223 - MS10-065: Vulnerabilities in Microsoft Internet Information Services (IIS) Could Allow Remote Code Execution (2267960)
  • 51904 - MS11-004: Vulnerability in Internet Information Services (IIS) FTP Service Could Allow Remote Code Execution (2489256)
  • 62905 - MS12-073: Vulnerabilities in Microsoft Internet Information Services (IIS) Could Allow Information Disclosure (2733829)
  • 79135 - MS14-076: Vulnerability in Internet Information Services (IIS) Could Allow Security Feature Bypass (2982998)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file iis_htw_auth_bypass.nasl version 1.16. For more plugins, visit the Nessus Plugin Library.

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