PHP < 7.3.29 Multiple Vulnerabilities (Jul 2021) - Linux

# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.0.117524");
  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:"2021-07-01 12:57:38 +0000 (Thu, 01 Jul 2021)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-10-08 03:44:00 +0000 (Fri, 08 Oct 2021)");

  script_cve_id("CVE-2021-21704", "CVE-2021-21705");

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

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

  script_name("PHP < 7.3.29 Multiple Vulnerabilities (Jul 2021) - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_php_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("php/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"PHP is prone to multiple vulnerabilities.");

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

  script_tag(name:"insight", value:"The following flaws exist:

  - CVE-2021-21705: SSRF bypass in FILTER_VALIDATE_URL.

  - CVE-2021-21704: Stack buffer overflow in firebird_info_cb.

  - CVE-2021-21704: SIGSEGV in firebird_handle_doer.

  - CVE-2021-21704: SIGSEGV in firebird_stmt_execute.

  - CVE-2021-21704: Crash while parsing blob data in firebird_fetch_blob.");

  script_tag(name:"affected", value:"PHP versions prior to 7.3.29.");

  script_tag(name:"solution", value:"Update to version 7.3.29 or later.");

  script_xref(name:"URL", value:"https://www.php.net/ChangeLog-7.php#7.3.29");
  script_xref(name:"URL", value:"http://bugs.php.net/81122");
  script_xref(name:"URL", value:"http://bugs.php.net/76448");
  script_xref(name:"URL", value:"http://bugs.php.net/76449");
  script_xref(name:"URL", value:"http://bugs.php.net/76450");
  script_xref(name:"URL", value:"http://bugs.php.net/76452");

  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_is_less(version: version, test_version: "7.3.29")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.3.29", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);