PHP 4.3.x < 5.2.7 Buffer Overflow Vulnerability

# SPDX-FileCopyrightText: 2008 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:php:php";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900185");
  script_version("2025-09-24T05:39:03+0000");
  script_tag(name:"last_modification", value:"2025-09-24 05:39:03 +0000 (Wed, 24 Sep 2025)");
  script_tag(name:"creation_date", value:"2008-12-31 15:14:17 +0100 (Wed, 31 Dec 2008)");
  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_cve_id("CVE-2008-5557");

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

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

  script_name("PHP 4.3.x < 5.2.7 Buffer Overflow Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2008 Greenbone AG");
  script_family("Buffer overflow");
  script_dependencies("gb_php_consolidation.nasl");
  script_mandatory_keys("php/detected");

  script_tag(name:"summary", value:"PHP is prone to a buffer overflow vulnerability.");

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

  script_tag(name:"insight", value:"An error exists in mbfilter_htmlent.c file in the mbstring
  extension. These can be exploited via mb_convert_encoding, mb_check_encoding,
  mb_convert_variables, and mb_parse_str functions.");

  script_tag(name:"impact", value:"Successful exploitation could allow attackers to execute
  arbitrary code via a crafted string containing an HTML entity.");

  script_tag(name:"affected", value:"PHP versions 4.3.x through 5.2.6.");

  script_tag(name:"solution", value:"Update to version 5.2.7 or later.");

  script_xref(name:"URL", value:"http://bugs.php.net/bug.php?id=45722");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/32948");
  script_xref(name:"URL", value:"http://archives.neohapsis.com/archives/fulldisclosure/2008-12/0477.html");

  exit(0);
}

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

if (isnull(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"];
location = infos["location"];

if (version_in_range(version: version, test_version: "4.3.0", test_version2: "5.2.6")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.2.7", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);