Cisco Nexus 3000 and 9000 Series Switches IS-IS Protocol Denial of Service (CVE-2023-20169)

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

include('compat.inc');

if (description)
{
  script_id(501656);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/25");

  script_cve_id("CVE-2023-20169");

  script_name(english:"Cisco Nexus 3000 and 9000 Series Switches IS-IS Protocol Denial of Service (CVE-2023-20169)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability in the Intermediate System-to-Intermediate System (IS-
IS) protocol of Cisco NX-OS Software for the Cisco Nexus 3000 Series
Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode
could allow an unauthenticated, adjacent attacker to cause the IS-IS
process to unexpectedly restart, which could cause an affected device
to reload. This vulnerability is due to insufficient input validation
when parsing an ingress IS-IS packet. An attacker could exploit this
vulnerability by sending a crafted IS-IS packet to an affected device.
A successful exploit could allow the attacker to cause a denial of
service (DoS) condition due to the unexpected restart of the IS-IS
process, which could cause the affected device to reload. Note: The
IS-IS protocol is a routing protocol. To exploit this vulnerability,
an attacker must be Layer 2 adjacent to the affected device.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-n3_9k-isis-dos-FTCXB4Vb
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0b3ab73d");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/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-2023-20169");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20);

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/08/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/08/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/19");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:10.3%282%29");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023 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:nx-os:10.3%282%29" :
        {"versionEndIncluding" : "10.3%282%29", "versionStartIncluding" : "10.3%282%29", "family" : "NXOS"}
};

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