Greenshot < 1.3.301 Deserialization of Untrusted Data (CVE-2025-59050)

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

include('compat.inc');

if (description)
{
  script_id(265429);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/19");

  script_cve_id("CVE-2025-59050");
  script_xref(name:"IAVA", value:"2025-A-0686");

  script_name(english:"Greenshot < 1.3.301 Deserialization of Untrusted Data (CVE-2025-59050)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host has an application installed which is affected by a deserialization of untrusted data vulnerability.");
  script_set_attribute(attribute:"description", value:
"The Greenshot installation on the remote Windows host is prior to 1.3.301. It is, therefore, affected by a 
deserialization of untrusted data vulnerability:

  - Greenshot 1.3.300 and earlier deserializes attacker-controlled data received in a WM_COPYDATA message using
    BinaryFormatter.Deserialize without prior validation or authentication, allowing a local process at the same
    integrity level to trigger arbitrary code execution inside the Greenshot process. (CVE-2025-59050) 

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/greenshot/greenshot/security/advisories/GHSA-8f7f-x7ww-xx5w 
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fa18fcfc");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Greenshot version 1.3.301 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-59050");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/09/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:greenshot:greenshot");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("greenshot_win_installed.nbin");
  script_require_keys("installed_sw/Greenshot");

  exit(0);
}

include('vdf.inc');



# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'Greenshot', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'fixed_version': '1.3.301'}
      ]
    }
  ]
};

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