OpenSSL 'Diffie-Hellman small subgroups' MitM Attack Vulnerability - Linux

# SPDX-FileCopyrightText: 2016 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:openssl:openssl";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.806674");
  script_version("2024-02-15T05:05:40+0000");
  script_cve_id("CVE-2016-0701");
  script_tag(name:"cvss_base", value:"2.6");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2024-02-15 05:05:40 +0000 (Thu, 15 Feb 2024)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-10-20 22:15:00 +0000 (Tue, 20 Oct 2020)");
  script_tag(name:"creation_date", value:"2016-02-01 16:08:40 +0530 (Mon, 01 Feb 2016)");
  script_tag(name:"qod_type", value:"remote_banner_unreliable");
  script_name("OpenSSL 'Diffie-Hellman small subgroups' MitM Attack Vulnerability - Linux");

  script_tag(name:"summary", value:"OpenSSL is prone to a man-in-the-middle (MitM) attack vulnerability.");

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

  script_tag(name:"insight", value:"The flaw exists as the primes used in X9.42 style
  parameter files may not be safe. When an application is using Diffie-Hellman
  configured with parameters based on primes that are not safe then an attacker
  could use this fact to find a peer's private DH exponent.");

  script_tag(name:"impact", value:"Successful exploitation will allow a remote
  attacker to conduct man-in-the-middle attack.");

  script_tag(name:"affected", value:"OpenSSL versions 1.0.2x before 1.0.2f on
  Linux.");

  script_tag(name:"solution", value:"Upgrade to OpenSSL 1.0.2f or later.");

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

  script_xref(name:"URL", value:"https://www.openssl.org/news/secadv/20160128.txt");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("General");
  script_dependencies("gb_openssl_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("openssl/detected", "Host/runs_unixoide");

  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);

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

if(vers =~ "^1\.0\.2" && version_is_less(version:vers, test_version:"1.0.2f")) {
  report = report_fixed_ver(installed_version:vers, fixed_version:"1.0.2f", install_path:path);
  security_message(port:port, data:report);
  exit(0);
}

exit(99);