Cisco NX-OS Software NX-API Cross-Site Request Forgery (CVE-2021-1227)

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

include('compat.inc');

if (description)
{
  script_id(501336);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/26");

  script_cve_id("CVE-2021-1227");

  script_name(english:"Cisco NX-OS Software NX-API Cross-Site Request Forgery (CVE-2021-1227)");

  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 NX-API feature of Cisco NX-OS Software could
allow an unauthenticated, remote attacker to conduct a cross-site
request forgery (CSRF) attack on an affected system. This
vulnerability is due to insufficient CSRF protections for the NX-API
on an affected device. An attacker could exploit this vulnerability by
persuading a user of the NX-API to follow a malicious link. A
successful exploit could allow the attacker to perform arbitrary
actions with the privilege level of the affected user. The attacker
could view and modify the device configuration. Note: The NX-API
feature is disabled by default.

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-nxos-nxapi-csrf-wRMzWL9z
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bb7c1119");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  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:N/UI:R/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-1227");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(352);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/24");
  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:7.3%288%29n1%280.809%29");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:8.4%282a%29");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:8.4%283%29");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:8.4%283%29s19");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:9.3%283%29idi9%280.569%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:8.4%282a%29" :
        {"versionEndIncluding" : "8.4%282a%29", "versionStartIncluding" : "8.4%282a%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:8.4%283%29" :
        {"versionEndIncluding" : "8.4%283%29", "versionStartIncluding" : "8.4%283%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:8.4%283%29s19" :
        {"versionEndIncluding" : "8.4%283%29s19", "versionStartIncluding" : "8.4%283%29s19", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:9.3%283%29idi9%280.569%29" :
        {"versionEndIncluding" : "9.3%283%29idi9%280.569%29", "versionStartIncluding" : "9.3%283%29idi9%280.569%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:7.3%288%29n1%280.809%29" :
        {"versionEndIncluding" : "7.3%288%29n1%280.809%29", "versionStartIncluding" : "7.3%288%29n1%280.809%29", "family" : "NXOS"}
};

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