WordPress RCE Vulnerability (CVE-2019-8942) - Linux

# SPDX-FileCopyrightText: 2019 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:wordpress:wordpress";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.142029");
  script_version("2024-06-28T15:38:46+0000");
  script_tag(name:"last_modification", value:"2024-06-28 15:38:46 +0000 (Fri, 28 Jun 2024)");
  script_tag(name:"creation_date", value:"2019-02-22 13:59:06 +0700 (Fri, 22 Feb 2019)");
  script_tag(name:"cvss_base", value:"6.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-04-25 12:57:00 +0000 (Thu, 25 Apr 2019)");

  script_cve_id("CVE-2019-8942");

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

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

  script_name("WordPress RCE Vulnerability (CVE-2019-8942) - Linux");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_wordpress_http_detect.nasl", "os_detection.nasl");
  script_mandatory_keys("wordpress/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"WordPress allows remote code execution (RCE) because an
  _wp_attached_file Post Meta entry can be changed to an arbitrary string, such as one ending with a
  .jpg?file.php substring. An attacker with author privileges can execute arbitrary code by
  uploading a crafted image containing PHP code in the Exif metadata. Exploitation can leverage
  CVE-2019-8943.");

  script_tag(name:"affected", value:"WordPress prior version 4.9.9 and 5.0.1.");

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

  script_tag(name:"solution", value:"Update to version 4.9.9, 5.0.1 or later.");

  script_xref(name:"URL", value:"https://blog.ripstech.com/2019/wordpress-image-remote-code-execution/");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/107088");

  exit(0);
}

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

if (!port = get_app_port(cpe: CPE))
  exit(0);

if(!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE)) exit(0);
version = infos["version"];
path = infos["location"];

if (version_is_less(version: version, test_version: "4.9.9")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.9.9", install_path: path);
  security_message(port: port, data: report);
  exit(0);
}

if (version =~ "^5\.") {
  if (version_is_less(version: version, test_version: "5.0.1")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "5.0.1", install_path: path);
    security_message(port: port, data: report);
    exit(0);
  }
}

exit(99);