Cisco NX-OS Improper Input Validation (CVE-2017-12338)

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

include('compat.inc');

if (description)
{
  script_id(502797);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/16");

  script_cve_id("CVE-2017-12338");

  script_name(english:"Cisco NX-OS Improper Input Validation (CVE-2017-12338)");

  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 CLI of Cisco NX-OS System Software could allow
an authenticated, local attacker to read the contents of arbitrary
files. The vulnerability is due to insufficient input validation for a
specific CLI command. An attacker could exploit this vulnerability by
issuing a crafted command on the CLI. An exploit could allow the
attacker unauthorized access to read arbitrary files on the underlying
local file system. On products that support multiple virtual device
contexts (VDCs), this vulnerability could allow an attacker to read
files from any VDC. This vulnerability affects the following products
running Cisco NX-OS System Software: Multilayer Director Switches,
Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus
5000 Series Switches, Nexus 5500 Platform Switches, Nexus 5600
Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series
Switches, Nexus 7700 Series Switches, Nexus 9000 Series Fabric
Switches in Application Centric Infrastructure (ACI) mode, Nexus 9000
Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line
Cards and Fabric Modules, Unified Computing System Manager. Cisco Bug
IDs: CSCve51707, CSCve93961, CSCve93964, CSCve93965, CSCve93968,
CSCve93974, CSCve93976.

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/1039937");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos6
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?036ba717");
  script_set_attribute(attribute:"see_also", value:"http://www.securitytracker.com/id/1039937");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-nxos6
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?036ba717");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/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-2017-12338");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/12/04");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nexus_3000_series_switches");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nexus_5000_series_switches");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nexus_7000_series_switches");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nexus_9000_series_switches");
  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) 2024-2025 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:nexus_7000_series_switches:8.0%281%29" :
        {"versionEndIncluding" : "8.0%281%29", "versionStartIncluding" : "8.0%281%29", "family" : "NXOS"},
    "cpe:/o:cisco:nexus_7000_series_switches:8.1%281%29" :
        {"versionEndIncluding" : "8.1%281%29", "versionStartIncluding" : "8.1%281%29", "family" : "NXOS"},
    "cpe:/o:cisco:nexus_3000_series_switches" :
        {"versionEndIncluding" : "8.1%280%29BD%280.20%29", "versionStartIncluding" : "8.1%280%29BD%280.20%29", "family" : "NXOS"},
    "cpe:/o:cisco:nexus_9000_series_switches:7.0%283%29I6%282%29" :
        {"versionEndIncluding" : "7.0%283%29I6%282%29", "versionStartIncluding" : "7.0%283%29I6%282%29", "family" : "NXOS"},
    "cpe:/o:cisco:nexus_5000_series_switches" :
        {"versionEndExcluding" : "7.3%283%29N1%281%29", "family" : "NXOS"},
    "cpe:/o:cisco:nexus_9000_series_switches:13.1%281i%29" :
        {"versionEndExcluding" : "13.1%281i%29", "family" : "NXOS"},
    "cpe:/o:cisco:nexus_9000_series_switches:7.0%283%29F3%281%29" :
        {"versionEndExcluding" : "7.0%283%29F3%281%29", "family" : "NXOS"}
};

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