Mitsubishi Electric MELSEC iQ-R Series/iQ-F Series Use of Hard-Coded Credentials (CVE-2023-2061)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(501221);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/25");

  script_cve_id("CVE-2023-2061");

  script_name(english:"Mitsubishi Electric MELSEC iQ-R Series/iQ-F Series Use of Hard-Coded Credentials (CVE-2023-2061)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Use of Hard-coded Password vulnerability in FTP function on Mitsubishi
Electric Corporation MELSEC iQ-R Series EtherNet/IP module RJ71EIP91
and MELSEC iQ-F Series EtherNet/IP module FX5-ENET/IP allows a remote
unauthenticated attacker to obtain a hard-coded password and access to
the module via FTP.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2023-004.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6fa8885c");
  script_set_attribute(attribute:"see_also", value:"https://jvn.jp/vu/JVNVU92908006");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-23-157-02");
  script_set_attribute(attribute:"solution", value:
'The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original
can be found at CISA.gov.

Mitsubishi Electric recommends that users of the affected products take the following actions.:

- RJ71EIP91: Consider replacing to the next generation model, CC-Link IE TSN Plus Master/Local Module RJ71GN11-EIP.
- FX5-ENET/IP: use IP filter function to block access from untrusted hosts. For details on the IP filter function,
please refer to the following manual: "12.1 IP Filter Function" in the MELSEC iQ-F FX5 User\'s Manual (Ethernet
Communication).
- SW1DNN-EIPCT-BD: Download and update the fixed version Software version "1.02C" or later
- RJ71EIP91 firmware version "06" or later: FTP function can be disabled in firmware version "06" or later. Except when
configuring with the EtherNet/IP Configuration Tool, to prevent unauthorized access from outside, set the connection to
"Deny connection" in the EtherNet/IP Configuration Tool Connection Permission Change function and disable the
EtherNet/IP module\'s FTP function of the EtherNet/IP module. However, firmware versions earlier than "06" cannot be
updated to version "06" or later. For detailed configuration instructions, please refer to the following manuals: MELSEC
iQ-R EtherNet/IP Module User\'s Manual (Application) "1.3 Ethernet/IP Configuration Tool Connectable Function".

Mitsubishi Electric recommends that customers take the following mitigation measures to minimize the risk of exploiting
these vulnerabilities common to RJ71EIP91 and FX5-ENET/IP:

- Use a firewall, virtual private network (VPN), etc. to prevent unauthorized access when Internet access is required.
- Use within a LAN and block access from untrusted networks and hosts through firewalls.
- Restrict physical access to prevent untrusted devices LAN to which the affected product connects.
- Avoid uploading/downloading files directly using FTP, and use the EtherNet/IP configuration tool. Also, do not open
the downloaded file with anything other than the EtherNet/IP configuration tool.

Mitsubishi Electric recommends that customers take the following mitigation measures to minimize the risk of exploiting
these vulnerabilities common to SW1DNN-EIPCT-BD and SW1DNN-EIPCTFX5-BD:

- Take the above mitigation measures in RJ71EIP91 and FX5-ENET/IP.
- Allow only trusted users to log in or remotely log in.
- Make sure that no one else sneaks a peek at the screen of a user from behind while using the product.
- If you leave your desk while using the product, lock your PC and prevent others from using it.
- Use the PC using the product within a LAN and block access from untrusted networks or hosts.
- Restrict physical access to the PC on which the product is installed as well as the PCs and network devices that can
communicate with the product.
- Install antivirus software on the PCs that use the product and on the PCs that can communicate with the product.
- Do not open untrusted files or click on untrusted links

For specific update instructions and additional details see the Mitsubishi Electric advisory.');
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-2061");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(798);

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/06/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/06/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/06/30");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:fx5-enet%2fip_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:rj71eip91_firmware:-");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Mitsubishi");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Mitsubishi');

var asset = tenable_ot::assets::get(vendor:'Mitsubishi');

var vuln_cpes = {
    "cpe:/o:mitsubishielectric:fx5-enet%2fip_firmware:-" :
        {"family" : "MELSECiQFCP"},
    "cpe:/o:mitsubishielectric:rj71eip91_firmware:-" :
        {"family" : "MELSECiQRCP"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);