Puppet Enterprise < 2016.4.3 / 2016.5 < 2016.5.2 DoS 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:/a:puppet:enterprise";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106582");
  script_version("2025-07-11T15:43:14+0000");
  script_tag(name:"last_modification", value:"2025-07-11 15:43:14 +0000 (Fri, 11 Jul 2025)");
  script_tag(name:"creation_date", value:"2017-02-09 13:27:28 +0700 (Thu, 09 Feb 2017)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-07-10 15:40:00 +0000 (Wed, 10 Jul 2019)");

  script_cve_id("CVE-2016-9686");

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

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

  script_name("Puppet Enterprise < 2016.4.3 / 2016.5 < 2016.5.2 DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_puppet_enterprise_consolidation.nasl");
  script_mandatory_keys("puppet/enterprise/detected");

  script_tag(name:"summary", value:"Puppet Enterprise is prone to a denial of service (DoS)
  vulnerability.");

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

  script_tag(name:"insight", value:"The Puppet Communications Protocol (PCP) broker incorrectly
  validates message header sizes. An attacker could use this vulnerability to crash the PCP broker,
  preventing commands from being sent to agents.");

  script_tag(name:"affected", value:"Puppet Enterprise 2015.3.x and 2016.x.");

  script_tag(name:"solution", value:"Update to version 2016.4.3, 2016.5.2 or later.");

  script_xref(name:"URL", value:"https://puppet.com/security/cve/cve-2016-9686");

  exit(0);
}

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

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

if (version_is_less(version: version, test_version: "2016.4.3")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2016.4.3");
  security_message(port: 0, data: report);
  exit(0);
}

if (version =~ "^2016\.5") {
  if (version_is_less(version: version, test_version:"2016.5.2")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "2016.5.2");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);