Ruby oj Gem < 3.17.3 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(333328);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/10");

  script_cve_id("CVE-2026-54592", "CVE-2026-54500");
  script_xref(name:"IAVB", value:"2026-B-0222");

  script_name(english:"Ruby oj Gem < 3.17.3 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The remote host has a module installed that is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of the oj Ruby gem installed on the remote host is prior to 3.17.3. It is, therefore, affected by
multiple vulnerabilities:

  - Oj::Doc#each_child, when invoked recursively over a deeply nested JSON document, overflows a fixed-size
    stack buffer and aborts the process, leading to DoS. (CVE-2026-54592)

  - Oj.load in :object mode reads uninitialized stack memory (and, for long keys, reads out of bounds) when
    parsing a JSON object whose key is 254 bytes or longer. The interned bytes can surface to the caller,
    disclosing process stack memory. (CVE-2026-54500)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported
version number.");
  script_set_attribute(attribute:"see_also", value:"https://github.com/ohler55/oj/security/advisories/GHSA-3m6q-jj5j-38c9");
  script_set_attribute(attribute:"see_also", value:"https://github.com/ohler55/oj/security/advisories/GHSA-fm7p-mprw-wjm9");
  script_set_attribute(attribute:"solution", value:
"Upgrade to oj version 3.17.3 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-54500");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(125);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/06/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ohler55:oj");
  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) 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 = 'oj';
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': '3.17.3'}
];

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