Tinyproxy <= 1.11.2 Integer Overflow Vulnerability

# 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:banu:tinyproxy";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.119237");
  script_version("2025-11-28T05:40:45+0000");
  script_tag(name:"last_modification", value:"2025-11-28 05:40:45 +0000 (Fri, 28 Nov 2025)");
  script_tag(name:"creation_date", value:"2025-11-27 14:46:01 +0000 (Thu, 27 Nov 2025)");
  script_tag(name:"cvss_base", value:"6.4");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:N");

  script_cve_id("CVE-2025-63938");

  # nb: Backports for older CVEs exists on at least Debian, Fedora and openSUSE...
  script_tag(name:"qod_type", value:"remote_banner_unreliable");

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

  script_name("Tinyproxy <= 1.11.2 Integer Overflow Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2025 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("sw_tinyproxy_http_detect.nasl");
  script_mandatory_keys("tinyproxy/detected");

  script_tag(name:"summary", value:"Tinyproxy is prone to an integer overflow vulnerability.");

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

  script_tag(name:"insight", value:"The product contains an integer overflow vulnerability in the
  strip_return_port() function within src/reqs.c.");

  script_tag(name:"affected", value:"Tinyproxy version 1.11.2 and prior.");

  # nb: Only source code fix, last version is still from May 2024:
  # https://github.com/tinyproxy/tinyproxy/releases
  script_tag(name:"solution", value:"No known solution is available as of 27th November, 2025.
  Information regarding this issue will be updated once solution details are available.");

  script_xref(name:"URL", value:"https://github.com/rayinaw/my-hub/blob/main/CVE-2025-63938/DISCLOSURE.md");
  script_xref(name:"URL", value:"https://github.com/tinyproxy/tinyproxy/issues/586");
  script_xref(name:"URL", value:"https://github.com/tinyproxy/tinyproxy/commit/3c0fde94981b025271ffa1788ae425257841bf5a");

  exit(0);
}

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

if (!port = get_app_port(cpe: CPE))
  exit(0);

if (!version = get_app_version(cpe: CPE, port: port))
  exit(0);

if (version_is_less_equal(version: version, test_version: "1.11.2")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "None");
  security_message(port: port, data: report);
  exit(0);
}

exit(0);