Cisco NX-OS Software Unauthorized Filesystem Access (CVE-2019-1601)

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

include('compat.inc');

if (description)
{
  script_id(501398);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/26");

  script_cve_id("CVE-2019-1601");

  script_name(english:"Cisco NX-OS Software Unauthorized Filesystem Access (CVE-2019-1601)");

  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 filesystem permissions of Cisco NX-OS Software
could allow an authenticated, local attacker to gain read and write
access to a critical configuration file. The vulnerability is due to a
failure to impose strict filesystem permissions on the targeted
device. An attacker could exploit this vulnerability by accessing and
modifying restricted files. A successful exploit could allow an
attacker to use the content of this configuration file to bypass
authentication and log in as any user of the device. MDS 9000 Series
Multilayer Switches are affected in versions prior to 6.2(25),
8.1(1b), and 8.3(1). Nexus 3000 Series Switches are affected in
versions prior to 7.0(3)I4(9) and 7.0(3)I7(4). Nexus 3500 Platform
Switches are affected in versions prior to 6.0(2)A8(10) and
7.0(3)I7(4). Nexus 3600 Platform Switches are affected in versions
prior to 7.0(3)F3(5). Nexus 2000, 5500, 5600, and 6000 Series Switches
are affected in versions prior to 7.1(5)N1(1b) and 7.3(3)N1(1). Nexus
7000 and 7700 Series Switches are affected in versions prior to
6.2(22), 7.3(3)D1(1), and 8.2(3). Nexus 9000 Series Switches-
Standalone are affected in versions prior to 7.0(3)I4(9) and
7.0(3)I7(4). Nexus 9500 R-Series Line Cards and Fabric Modules are
affected in versions prior to 7.0(3)F3(5).

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/107404");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-nxos-file-access
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fdaf1d8f");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-2019-1601");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(732);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/08");
  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:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os:8");
  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:8.3%281%29" :
        {"versionEndExcluding" : "8.3%281%29", "versionStartIncluding" : "8.2", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:7.0%283%29i7%284%29" :
        {"versionEndExcluding" : "7.0%283%29i7%284%29", "versionStartIncluding" : "7.0%283%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:7.0%283%29f3%285%29" :
        {"versionEndExcluding" : "7.0%283%29f3%285%29", "versionStartIncluding" : "7.0%283%29f1", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:8.1%281b%29" :
        {"versionEndExcluding" : "8.1%281b%29", "versionStartIncluding" : "7.3", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:6.2%2825%29" :
        {"versionEndExcluding" : "6.2%2825%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:7.0%283%29i4%289%29" :
        {"versionEndExcluding" : "7.0%283%29i4%289%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:7.3%283%29d1%281%29" :
        {"versionEndExcluding" : "7.3%283%29d1%281%29", "versionStartIncluding" : "7.2", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:6.2%2822%29" :
        {"versionEndExcluding" : "6.2%2822%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:6.0%282%29a8%2810%29" :
        {"versionEndExcluding" : "6.0%282%29a8%2810%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:7.3%283%29n1%281%29" :
        {"versionEndExcluding" : "7.3%283%29n1%281%29", "versionStartIncluding" : "7.2", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:7.1%285%29n1%281b%29" :
        {"versionEndExcluding" : "7.1%285%29n1%281b%29", "family" : "NXOS"},
    "cpe:/o:cisco:nx-os:8.1%282%29" :
        {"versionEndExcluding" : "8.1%282%29", "versionStartIncluding" : "8.0", "family" : "NXOS"}
};

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