Cisco Aironet 1800, 2800, and 3800 Series Access Points Plug-and-Play Arbitrary Code Execution Vulnerability

# Copyright (C) 2017 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/o:cisco:wireless_lan_controller_firmware";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106803");
  script_cve_id("CVE-2017-3873");
  script_tag(name:"cvss_base", value:"7.9");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:M/Au:N/C:C/I:C/A:C");
  script_version("2021-09-09T11:01:33+0000");

  script_name("Cisco Aironet 1800, 2800, and 3800 Series Access Points Plug-and-Play Arbitrary Code Execution Vulnerability");

  script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-cme");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"solution", value:"Update to version 8.3.112.0 or later.");

  script_tag(name:"summary", value:"A vulnerability in the Plug-and-Play (PnP) subsystem of the Cisco Aironet
1800, 2800, and 3800 Series Access Points running a Lightweight Access Point (AP) or Mobility Express image could
allow an unauthenticated, adjacent attacker to execute arbitrary code with root privileges.");

  script_tag(name:"insight", value:"The vulnerability is due to insufficient validation of PnP server responses.
The PnP feature is only active while the device does not contain a configuration, such as a first time boot or
after a factory reset has been issued. An attacker with the ability to respond to PnP configuration requests from
the affected device can exploit the vulnerability by returning malicious PnP responses. If a Cisco Application
Policy Infrastructure Controller - Enterprise Module (APIC-EM) is available on the network, the attacker would
need to exploit the issue in the short window before a valid PnP response was received.");

  script_tag(name:"impact", value:"If successful, the attacker could gain the ability to execute arbitrary code
with root privileges on the underlying operating system of the device.");

  script_tag(name:"qod_type", value:"remote_banner");
  script_tag(name:"solution_type", value:"VendorFix");

  script_tag(name:"last_modification", value:"2021-09-09 11:01:33 +0000 (Thu, 09 Sep 2021)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-07-11 01:33:00 +0000 (Tue, 11 Jul 2017)");
  script_tag(name:"creation_date", value:"2017-05-10 22:11:53 +0700 (Wed, 10 May 2017)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("Copyright (C) 2017 Greenbone Networks GmbH");
  script_dependencies("gb_cisco_wlc_consolidation.nasl");
  script_mandatory_keys("cisco/wlc/detected", "cisco/wlc/model");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

model = get_kb_item("cisco/wlc/model");
if (!model || model !~ "^AIR-AP(1|2|3)8[0-9]{2}")
  exit(0);

if (!version = get_app_version(cpe: CPE, nofork: TRUE))
  exit(0);

if (version == "8.3.102.0") {
  report = report_fixed_ver(installed_version: version, fixed_version: "8.3.112.0");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);