Apache HTTP Server 2.4.0 - 2.4.55 HTTP Request Smuggling Vulnerability - Linux

# SPDX-FileCopyrightText: 2023 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:apache:http_server";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.104597");
  script_version("2024-02-15T05:05:40+0000");
  script_tag(name:"last_modification", value:"2024-02-15 05:05:40 +0000 (Thu, 15 Feb 2024)");
  script_tag(name:"creation_date", value:"2023-03-08 09:17:09 +0000 (Wed, 08 Mar 2023)");
  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:3.1/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:"2023-03-14 15:41:00 +0000 (Tue, 14 Mar 2023)");

  script_cve_id("CVE-2023-25690");

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

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

  script_name("Apache HTTP Server 2.4.0 - 2.4.55 HTTP Request Smuggling Vulnerability - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("Web Servers");
  script_dependencies("gb_apache_http_server_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("apache/http_server/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"Apache HTTP Server is prone to a HTTP request smuggling
  vulnerability.");

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

  script_tag(name:"insight", value:"Some mod_proxy configurations allow a HTTP Request Smuggling
  attack.

  Configurations are affected when mod_proxy is enabled along with some form of RewriteRule or
  ProxyPassMatch in which a non-specific pattern matches some portion of the user-supplied
  request-target (URL) data and is then re-inserted into the proxied request-target using variable
  substitution.");

  script_tag(name:"impact", value:"Request splitting/smuggling could result in bypass of access
  controls in the proxy server, proxying unintended URLs to existing origin servers, and cache
  poisoning.");

  script_tag(name:"affected", value:"Apache HTTP Server versions 2.4.0 through 2.4.55.");

  script_tag(name:"solution", value:"Update to version 2.4.56 or later.");

  script_xref(name:"URL", value:"https://httpd.apache.org/security/vulnerabilities_24.html#2.4.56");

  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,
                                          version_regex: "^[0-9]+\.[0-9]+\.[0-9]+"))
  exit(0);

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

if (version_in_range_exclusive(version: version, test_version_lo: "2.4.0", test_version_up: "2.4.56")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.4.56", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);