Ruby RACK < 2.2.20 / 3.x < 3.1.18 / 3.2 < 3.2.3 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(270698);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/23");

  script_cve_id("CVE-2025-46727", "CVE-2025-61919");
  script_xref(name:"IAVB", value:"2025-B-0171-S");

  script_name(english:"Ruby RACK < 2.2.20 / 3.x < 3.1.18 / 3.2 < 3.2.3 Multiple Vulnerabilities");

  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 2.2.20 / 3.1.18 / 3.2.3. It is, 
therefore, affected by the following vulnerabilities:

  - Rack::Request#POST reads the entire request body into memory for Content-Type: application/x-www-form-urlencoded, calling 
    rack.input.read(nil) without enforcing a length or cap. Large request bodies can therefore be buffered completely into process 
    memory before parsing, leading to denial of service (DoS) through memory exhaustion. (CVE-2025-61919)

  - A possible information disclosure vulnerability existed in Rack::Sendfile when running behind a proxy that 
    supports x-sendfile headers (such as Nginx). Specially crafted headers could cause Rack::Sendfile to miscommunicate 
    with the proxy and trigger unintended internal requests, potentially bypassing proxy-level access restrictions. (CVE-2025-61780)

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-r657-rxjc-j557");
  script_set_attribute(attribute:"see_also", value:"https://github.com/rack/rack/security/advisories/GHSA-6xw4-3v39-52mm");
  script_set_attribute(attribute:"solution", value:
"Upgrade to RACK version 2.2.20 / 3.1.18 / 3.2.3 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-2025-61919");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/10/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/17");

  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 app_info = ruby_gems::get_app_info(app:'rack');

if (empty_or_null(app_info))
  audit(AUDIT_NOT_INST, 'rack');

vcf::check_all_backporting(app_info:app_info);

var constraints = [
  {'fixed_version': '2.2.20'},
  {'min_version': '3.0', 'fixed_version': '3.1.18'},
  {'min_version': '3.2', 'fixed_version': '3.2.3'}
];

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