Cisco IOS XE Software for Cisco ASR 920 Series Routers Zero Touch Provisioning Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2017 Greenbone AG
# 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-only

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

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106690");
  script_cve_id("CVE-2017-3859");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_version("2023-07-25T05:05:58+0000");

  script_name("Cisco IOS XE Software for Cisco ASR 920 Series Routers Zero Touch Provisioning Denial of Service Vulnerability");

  script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-ztp");

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

  script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");

  script_tag(name:"summary", value:"A vulnerability in the DHCP code for the Zero Touch Provisioning feature of
Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an
affected device to reload.");

  script_tag(name:"insight", value:"The vulnerability is due to a format string vulnerability when processing a
crafted DHCP packet for Zero Touch Provisioning. An attacker could exploit this vulnerability by sending a
specially crafted DHCP packet to an affected device.");

  script_tag(name:"impact", value:"An exploit could allow the attacker to cause the device to reload, resulting
in a denial of service (DoS) condition.");

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

  script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-07-12 01:29:00 +0000 (Wed, 12 Jul 2017)");
  script_tag(name:"creation_date", value:"2017-03-23 10:27:04 +0700 (Thu, 23 Mar 2017)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_dependencies("gb_cisco_ios_xe_consolidation.nasl");
  script_mandatory_keys("cisco/ios_xe/detected", "cisco/ios_xe/model");

  exit(0);
}

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

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

model = get_kb_item("cisco/ios_xe/model");
if (!model || model !~ "^920")
  exit(0);

affected = make_list(
  '3.13.4S',
  '3.13.5S',
  '3.13.5a.S',
  '3.13.6S',
  '3.13.6a.S',
  '3.14.3S',
  '3.14.4S',
  '3.15.2S',
  '3.15.3S',
  '3.15.4S',
  '3.16.0S',
  '3.16.0c.S',
  '3.16.1S',
  '3.16.1a.S',
  '3.16.2S',
  '3.16.2a.S',
  '3.16.2b.S',
  '3.16.3S',
  '3.16.3a.S',
  '3.17.0S',
  '3.17.1S',
  '3.17.1a.S',
  '3.17.2S',
  '3.18.0S',
  '3.18.0SP',
  '3.18.0a.S',
  '3.18.1S',
  '3.18.1SP',
  '3.18.1a.SP',
  '3.18.1b.SP',
  '3.18.1c.SP',
  '3.18.2S',
  '3.18.3v.S');

foreach af (affected) {
  if (version == af) {
    report = report_fixed_ver(installed_version: version, fixed_version: "See advisory");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);