RabbitMQ 4.2.x < 4.2.8 / 4.3.x < 4.3.2 Non-RFC-Conformant Auth Mechanism Cookie Name

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

include('compat.inc');

if (description)
{
  script_id(362550);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/02");

  script_cve_id("CVE-2026-67234");
  script_xref(name:"IAVA", value:"2026-A-1075");

  script_name(english:"RabbitMQ 4.2.x < 4.2.8 / 4.3.x < 4.3.2 Non-RFC-Conformant Auth Mechanism Cookie Name");

  script_set_attribute(attribute:"synopsis", value:
"The RabbitMQ installed on the remote host is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of RabbitMQ installed on the remote host is 4.2.x prior to 4.2.8, or 4.3.x prior to 4.3.2. It is, therefore,
affected by a vulnerability:

  - get_auth_mechanism/1 used term_to_binary/1 on the strict_auth_mechanism or preferred_auth_mechanism atom when
    clearing the corresponding cookie, producing a non-ASCII cookie name that violates RFC 6265 and can prevent the
    browser from deleting the preference. The issue is not directly exploitable for code execution or data
    exfiltration; its security relevance is limited to stale authentication mechanism preferences persisting across
    logout and login cycles. (CVE-2026-67234)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-q286-p3m9-j69f
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f7de6b5f");
  script_set_attribute(attribute:"solution", value:
"Upgrade to RabbitMQ version 4.2.8, 4.3.2, or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-67234");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/07/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/02");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:pivotal_software:rabbitmq");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:vmware:rabbitmq");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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("rabbitmq_server_nix_installed.nbin", "vmware_rabbitmq_win_installed.nbin");
  script_require_keys("installed_sw/RabbitMQ", "Settings/ParanoidReport");

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

# Not checking if the management plugin is enabled
if (report_paranoia < 2) audit(AUDIT_PARANOID);

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'paranoia': true}}
  ],
  'checks': [
    {
      'product': {'name': 'RabbitMQ', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'min_version': '4.2.0', 'fixed_version': '4.2.8'},
        {'min_version': '4.3.0', 'fixed_version': '4.3.2'}
      ]
    }
  ]
};

var result = vdf::check_and_report(vuln_data:vuln_data, severity:SECURITY_HOLE);
vdf::handle_check_and_report_errors(vdf_result:result);