Cisco Nexus 3000 and 9000 Series CLI and Simple Network Management Protocol Polling Denial of Service (CVE-2018-0309)

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

include('compat.inc');

if (description)
{
  script_id(501297);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/26");

  script_cve_id("CVE-2018-0309");

  script_name(english:"Cisco Nexus 3000 and 9000 Series CLI and Simple Network Management Protocol Polling Denial of Service (CVE-2018-0309)");

  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 implementation of a specific CLI command and
the associated Simple Network Management Protocol (SNMP) MIB for Cisco
NX-OS (in standalone NX-OS mode) on Cisco Nexus 3000 and 9000 Series
Switches could allow an authenticated, remote attacker to exhaust
system memory on an affected device, resulting in a denial of service
(DoS) condition. The vulnerability is due to the incorrect
implementation of the CLI command, resulting in a failure to free all
allocated memory upon completion. An attacker could exploit this
vulnerability by authenticating to the affected device and repeatedly
issuing a specific CLI command or sending a specific SNMP poll request
for a specific Object Identifier (OID). A successful exploit could
allow the attacker to cause the IP routing process to restart or to
cause a device reset, resulting in a DoS condition. Cisco Bug IDs:
CSCvf23136.

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.securitytracker.com/id/1041169");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-n3k-n9k-clisnmp
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bc231f88");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:N/AC:L/PR:L/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-2018-0309");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(400);

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/06/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/06/21");
  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:7.0%283%29i5%282%29");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:7.0%283%29i6%281%29");
  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:7.0%283%29i5%282%29" :
        {"versionEndIncluding" : "7.0%283%29i5%282%29", "versionStartIncluding" : "7.0%283%29i5%282%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:7.0%283%29i6%281%29" :
        {"versionEndIncluding" : "7.0%283%29i6%281%29", "versionStartIncluding" : "7.0%283%29i6%281%29", "family" : "NXOS"}
};

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