Ruby RACK < 2.2.14 / 3.0.16 / 3.1.14 DoS vulnerability

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(236779);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/23");

  script_cve_id("CVE-2025-46727");
  script_xref(name:"IAVA", value:"2025-B-0073-S");

  script_name(english:"Ruby RACK < 2.2.14 / 3.0.16 / 3.1.14 DoS vulnerability");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has an application installed that is affected by DoS vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of the RACK Ruby library installed on the remote host is prior to 2.2.14 / 3.0.16 / 3.1.14 . It is, 
therefore, affected by a DoS vulnerability where an attacker can trigger denial of service by sending specifically 
crafted HTTP requests, which can cause memory exhaustion or pin CPU resources, stalling or crashing the Rack server. 
This results in full service disruption until the affected worker is restarted.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://github.com/rack/rack/security/advisories/GHSA-gjh7-p2fx-99vx");
  script_set_attribute(attribute:"solution", value:
"Upgrade to RACK version 2.2.14 / 3.0.16 / 3.1.14 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-46727");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/05/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ruby:rack");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ruby_modules_nix_installed.nbin", "ruby_gem_modules_macos_installed.nbin", "ruby_modules_win_installed.nbin");
  script_require_keys("Host/ruby/modules/enumerated");

  exit(0);
}
include('ruby.inc');

var gem_name = 'rack';

var app_info = ruby_gems::get_app_info(app:gem_name);

if (empty_or_null(app_info))
  audit(AUDIT_NOT_INST, gem_name);

vcf::check_all_backporting(app_info:app_info);

var constraints = [
  {'fixed_version': '2.2.14'},
  {'min_version': '3.0', 'fixed_version': '3.0.16'},
  {'min_version': '3.1', 'fixed_version': '3.1.14'}
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);