phpBB < 3.2.4 RCE Vulnerability

# SPDX-FileCopyrightText: 2018 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:phpbb:phpbb";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108482");
  script_version("2026-05-21T06:54:30+0000");
  script_tag(name:"last_modification", value:"2026-05-21 06:54:30 +0000 (Thu, 21 May 2026)");
  script_tag(name:"creation_date", value:"2018-11-21 09:03:29 +0100 (Wed, 21 Nov 2018)");
  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:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-12-02 19:21:00 +0000 (Fri, 02 Dec 2022)");

  script_cve_id("CVE-2018-19274");

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

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

  script_name("phpBB < 3.2.4 RCE Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_phpbb_http_detect.nasl");
  script_mandatory_keys("phpbb/detected");

  script_tag(name:"summary", value:"phpBB is prone to a remote code execution (RCE) vulnerability
  through object injection.");

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

  script_tag(name:"insight", value:"Passing an absolute path to a file_exists check allows remote
  code execution through object injection by employing Phar deserialization when an attacker has
  access to the Admin Control Panel with founder permissions.");

  script_tag(name:"impact", value:"Successful exploitation allows remote code execution for users
  with founder permissions to gain access to the underlying system.");

  script_tag(name:"affected", value:"phpBB prior to version 3.2.4.");

  script_tag(name:"solution", value:"Update to version 3.2.4 or later.");

  script_xref(name:"URL", value:"https://wiki.phpbb.com/Release_Highlights/3.2.4");
  script_xref(name:"URL", value:"https://www.phpbb.com/community/viewtopic.php?f=14&t=2492206");

  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 );

vers = infos["version"];
path = infos["location"];

if( version_is_less( version:vers, test_version:"3.2.4" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"3.2.4", install_path:path );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );