Cisco FXOS and NX-OS Software Link Layer Discovery Protocol Denial of Service (CVE-2018-0395)

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

include('compat.inc');

if (description)
{
  script_id(501324);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/26");

  script_cve_id("CVE-2018-0395");

  script_name(english:"Cisco FXOS and NX-OS Software Link Layer Discovery Protocol Denial of Service (CVE-2018-0395)");

  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 Link Layer Discovery Protocol (LLDP)
implementation for Cisco FXOS Software and Cisco NX-OS Software could
allow an unauthenticated, adjacent attacker to cause a denial of
service (DoS) condition when the device unexpectedly reloads. The
vulnerability is due to improper input validation of certain type,
length, value (TLV) fields of the LLDP frame header. An attacker could
exploit this vulnerability by sending a crafted LLDP packet to an
interface on the targeted device. A successful exploit could allow the
attacker to cause the switch to reload unexpectedly.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181017-fxnx-os-dos
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3775192a");
  script_set_attribute(attribute:"see_also", value:"http://www.securitytracker.com/id/1041919");
  script_set_attribute(attribute:"see_also", value:"http://www.securityfocus.com/bid/105674");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/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-2018-0395");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/10/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/07/25");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:12.3%281e%29");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:3.2%283d%29c");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:6.0%284%29");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:6.1%283%29s2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:r231");
  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 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:6.0%284%29" :
        {"versionEndIncluding" : "6.0%284%29", "versionStartIncluding" : "6.0%284%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:6.1%283%29s2" :
        {"versionEndIncluding" : "6.1%283%29s2", "versionStartIncluding" : "6.1%283%29s2", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:r231" :
        {"versionEndIncluding" : "r231", "versionStartIncluding" : "r231", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:12.3%281e%29" :
        {"versionEndIncluding" : "12.3%281e%29", "versionStartIncluding" : "12.3%281e%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:3.2%283d%29c" :
        {"versionEndIncluding" : "3.2%283d%29c", "versionStartIncluding" : "3.2%283d%29c", "family" : "NXOS"}
};

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