Cisco Nexus 5600 and 6000 Series Switches Fibre Channel over Ethernet Denial of Service (CVE-2019-1595)

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

include('compat.inc');

if (description)
{
  script_id(501407);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/26");

  script_cve_id("CVE-2019-1595");

  script_name(english:"Cisco Nexus 5600 and 6000 Series Switches Fibre Channel over Ethernet Denial of Service (CVE-2019-1595)");

  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 Fibre Channel over Ethernet (FCoE) protocol
implementation in Cisco NX-OS Software could allow an unauthenticated,
adjacent attacker to cause a denial of service (DoS) condition on an
affected device. The vulnerability is due to an incorrect allocation
of an internal interface index. An adjacent attacker with the ability
to submit a crafted FCoE packet that crosses affected interfaces could
trigger this vulnerability. A successful exploit could allow the
attacker to cause a packet loop and high throughput on the affected
interfaces, resulting in a DoS condition. This vulnerability has been
fixed in version 7.3(5)N1(1).

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/107320");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nexus-fbr-dos
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1d6ac1d0");
  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:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-1595");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(913);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/06");
  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");
  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" :
        {"versionEndExcluding" : "7.3%285%29n1%281%29", "family" : "NXOS"}
};

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