Ruby net-imap < 0.5.15 / 0.6.x < 0.6.4.1 Multiple Vulnerabilities

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

include('compat.inc');

if (description)
{
  script_id(321503);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/26");

  script_cve_id("CVE-2026-47240", "CVE-2026-47241", "CVE-2026-47242");
  script_xref(name:"IAVB", value:"2026-B-0162");

  script_name(english:"Ruby net-imap < 0.5.15 / 0.6.x < 0.6.4.1 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 net-imap Ruby library installed on the remote host is prior to 0.5.15, or 0.6.x prior to 0.6.4.1.
It is, therefore, affected by multiple vulnerabilities.

  - Several Net::IMAP commands accept a raw data argument that is sent verbatim after validation to prevent command
    injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject
    arbitrary IMAP commands inside non-synchronizing literals. (CVE-2026-47240)

  - Several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and
    then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command
    to be absorbed as a continuation of the first command, causing a denial of service. (CVE-2026-47241)

  - Two Net::IMAP commands, id and enable, do not validate their arguments. Arguments to either command could be
    used by an attacker to inject arbitrary IMAP commands. (CVE-2026-47242)

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/ruby/net-imap/security/advisories/GHSA-46q3-7gv7-qmgg
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?85e59783");
  # https://github.com/ruby/net-imap/security/advisories/GHSA-8p34-64r3-mwg8
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0f4b0562");
  # https://github.com/ruby/net-imap/security/advisories/GHSA-c4fp-cxrr-mj66
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f8bf6a87");
  script_set_attribute(attribute:"solution", value:
"Upgrade to net-imap version 0.5.15 or 0.6.4.1 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:C/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-47240");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-47242");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/06/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ruby:net-imap");
  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("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 = 'net-imap';
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 = [
  {'min_version': '0', 'fixed_version': '0.5.15'},
  {'min_version': '0.6.0', 'fixed_version': '0.6.4.1'}
];

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