Palo Alto PAN-OS DNS-Proxy RCE 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:paloaltonetworks:pan-os";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106978");
  script_version("2026-04-28T06:28:06+0000");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2017-07-21 11:50:18 +0700 (Fri, 21 Jul 2017)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/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:"2020-02-17 16:15:00 +0000 (Mon, 17 Feb 2020)");

  script_cve_id("CVE-2017-8390");

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

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

  script_name("Palo Alto PAN-OS DNS-Proxy RCE Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Palo Alto PAN-OS Local Security Checks");
  script_dependencies("gb_paloalto_panos_consolidation.nasl");
  script_mandatory_keys("palo_alto_pan_os/version");

  script_tag(name:"summary", value:"A Remote Code Execution vulnerability exists in the PAN-OS DNS Proxy.");

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

  script_tag(name:"insight", value:"This issue affects customers who have DNS Proxy enabled in PAN-OS. This
issue affects both the Data and Management planes of the firewall. When DNS Proxy processes a specially crafted
fully qualified domain names (FQDN), it is possible to execute code on the firewall.");

  script_tag(name:"impact", value:"Successful exploitation of this issue could allow an attacker to execute
code on the firewall.");

  script_tag(name:"affected", value:"PAN-OS 6.1.17 and earlier, PAN-OS 7.0.15 and earlier, PAN-OS 7.1.9 and
earlier, PAN-OS 8.0.2 and earlier.");

  script_tag(name:"solution", value:"Update to PAN-OS 6.1.18, PAN-OS 7.0.16, PAN-OS 7.1.10, PAN-OS 8.0.3 or
later.");

  script_xref(name:"URL", value:"https://securityadvisories.paloaltonetworks.com/Home/Detail/89");

  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("palo_alto_pan_os/model");

if (version_is_less(version: version, test_version: "6.1.18")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.1.18");
  if (model)
    report += '\nModel:             ' + model;

  security_message(port: 0, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "7.0", test_version2: "7.0.15")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.0.16");
  if (model)
    report += '\nModel:             ' + model;

  security_message(port: 0, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "7.1", test_version2: "7.1.9")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.1.10");
  if (model)
    report += '\nModel:             ' + model;

  security_message(port: 0, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "8.0", test_version2: "8.0.2")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "8.0.3");
  if (model)
    report += '\nModel:             ' + model;

  security_message(port: 0, data: report);
  exit(0);
}

exit(99);