Apache Tomcat Rewrite Rule Bypass Vulnerability (Apr 2025) - Linux

# SPDX-FileCopyrightText: 2025 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:tomcat";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.154399");
  script_version("2025-05-06T05:40:10+0000");
  script_tag(name:"last_modification", value:"2025-05-06 05:40:10 +0000 (Tue, 06 May 2025)");
  script_tag(name:"creation_date", value:"2025-04-29 03:08:21 +0000 (Tue, 29 Apr 2025)");
  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:"2025-05-05 20:14:47 +0000 (Mon, 05 May 2025)");

  script_cve_id("CVE-2025-31651");

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

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

  script_name("Apache Tomcat Rewrite Rule Bypass Vulnerability (Apr 2025) - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2025 Greenbone AG");
  script_family("Web Servers");
  script_dependencies("gb_apache_tomcat_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("apache/tomcat/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"Apache Tomcat is prone to a rewrite rule bypass
  vulnerability.");

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

  script_tag(name:"insight", value:"For a subset of unlikely rewrite rule configurations, it is
  possible for a specially crafted request to bypass some rewrite rules. If those rewrite rules
  effectively enforced security constraints, those constraints could be bypassed.");

  script_tag(name:"affected", value:"Apache Tomcat version 9.0.102 and prior, 10.x through
  10.1.39 and 11.0.0-M1 through 11.0.5.

  Note: While not explicitly mentioned by the vendor (due to the EOL status of these branches) it
  is assumed that the whole 10.x branch and all versions prior to 9.x are affected by these flaws.
  If you disagree with this assessment and want to accept the risk please create an override for
  this result.");

  script_tag(name:"solution", value:"Update to version 9.0.104, 10.1.40, 11.0.6 or later.");

  script_xref(name:"URL", value:"https://lists.apache.org/thread/cpklvqwvdrp4k9hmd2l3q33j0gzy4fox");

  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_equal(version: version, test_version: "9.0.102")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "9.0.104", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "10.0.0", test_version_up: "10.1.40")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "10.1.40", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "11.0.0.M2", test_version_up: "11.0.6")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "11.0.6", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);