RARLAB WinRAR < 7.23 Heap-Based Buffer Overflow (CVE-2026-14191)

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

include('compat.inc');

if (description)
{
  script_id(324970);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/06");

  script_cve_id("CVE-2026-14191");

  script_name(english:"RARLAB WinRAR < 7.23 Heap-Based Buffer Overflow (CVE-2026-14191)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host has an application installed which is affected by a heap-based buffer overflow vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of RARLAB WinRAR installed on the remote Windows host is prior to 7.23. It is, therefore, affected by a
heap-based buffer overflow vulnerability:

  - An out-of-bounds heap write exists in the RAR5 recovery-volume (.rev) parser. The RecItems vector is sized only
    when the first .rev file in a set is processed; subsequent .rev files supply an independent RecNum value that is
    never validated against the actual size of RecItems. A crafted set of .rev files can write an attacker-controlled
    value at an attacker-controlled offset past the allocation, corrupting adjacent heap objects. An attacker can
    leverage this vulnerability to execute code in the context of the current process. (CVE-2026-14191)

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://www.rarlab.com/rarnew.htm");
  script_set_attribute(attribute:"solution", value:
"Upgrade to RARLAB WinRAR version 7.23 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  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:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-14191");

  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:"2026/06/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:rarlab:winrar");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

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

  script_dependencies("winrar_win_installed.nbin");
  script_require_keys("installed_sw/RARLAB WinRAR", "SMB/Registry/Enumerated");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'RARLAB WinRAR', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '7.23'}
      ]
    }
  ]
};

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