Devolutions Server 2026.2.4 <= 2026.2.7 Credential Exposure (DEVO-2026-0020)

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

include('compat.inc');

if (description)
{
  script_id(324959);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/06");

  script_cve_id("CVE-2026-12755");
  script_xref(name:"IAVB", value:"2026-B-0183");

  script_name(english:"Devolutions Server 2026.2.4 <= 2026.2.7 Credential Exposure (DEVO-2026-0020)");

  script_set_attribute(attribute:"synopsis", value:
"The Devolutions Server instance installed on the remote host is affected by a credential exposure vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Devolutions Server installed on the remote host is 2026.2.4 through 2026.2.7. It is, therefore,
affected by a vulnerability:

  - Improper input validation in the PAM AD discovery endpoints allows an authenticated user with the
    UserGroupsView permission to coerce server-side authentication to an attacker-controlled host, exposing
    PAM provider credentials as a NTLMv2 challenge-response, via a crafted DomainName parameter.
    (CVE-2026-12755)

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://devolutions.net/security/advisories/DEVO-2026-0020/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Devolutions Server version 2026.2.9 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:M/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:H/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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/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-2026-12755");

  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:"2026/06/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/23");
  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:devolutions:devolutions_server");
  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) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("devolutions_server_win_installed.nbin");
  script_require_keys("installed_sw/Devolutions Server");

  exit(0);
}

include('vdf.inc');

# @tvdl-content
var vuln_data = {
  'metadata': {'spec_version': '1.0'},
  'requires': [
    {'scope': 'target', 'match': {'os': 'windows'}}
  ],
  'checks': [
    {
      'product': {'name': 'Devolutions Server', 'type': 'app'},
      'check_algorithm': 'default',
      'constraints': [
        {'min_version': '2026.2.4.0', 'max_version': '2026.2.7.0', 'fixed_display': '2026.2.9.0'}
      ]
    }
  ]
};

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