Cisco NX-OS Improper Verification of Cryptographic Signature (CVE-2017-12333)

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

include('compat.inc');

if (description)
{
  script_id(502753);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/16");

  script_cve_id("CVE-2017-12333");

  script_name(english:"Cisco NX-OS Improper Verification of Cryptographic Signature (CVE-2017-12333)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability in Cisco NX-OS System Software could allow an
authenticated, local attacker to bypass signature verification when
loading a software image. The vulnerability is due to insufficient NX-
OS signature verification for software images. An authenticated, local
attacker could exploit this vulnerability to bypass signature
verification and load a crafted, unsigned software image on a targeted
device. The attacker would need valid administrator credentials to
perform this exploit. This vulnerability affects the following
products running Cisco NX-OS System Software: Multilayer Director
Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches,
Unified Computing System Manager. Cisco Bug IDs: CSCvf25045,
CSCvf31495.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"http://www.securityfocus.com/bid/102161");
  script_set_attribute(attribute:"see_also", value:"http://www.securitytracker.com/id/1039933");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos2
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f9a16bbc");
  script_set_attribute(attribute:"see_also", value:"http://www.securityfocus.com/bid/102161");
  script_set_attribute(attribute:"see_also", value:"http://www.securitytracker.com/id/1039933");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos2
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f9a16bbc");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-12333");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(347);

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/12/04");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nexus_7000_series_switches");
  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) 2024-2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Cisco');

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

var vuln_cpes = {
    "cpe:/o:cisco:nexus_7000_series_switches" :
        {"versionEndIncluding" : "8.1%281%29", "versionStartIncluding" : "8.1%281%29", "family" : "NXOS"}
};

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