SAP NetWeaver AS ABAP Missing Authorization Check (3688703)

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

include('compat.inc');

if (description)
{
  script_id(288281);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/10");

  script_cve_id("CVE-2026-0506");
  script_xref(name:"IAVB", value:"2026-A-0031");

  script_name(english:"SAP NetWeaver AS ABAP Missing Authorization Check (3688703)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SAP NetWeaver Application Server for ABAP is affected by a authorization check vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote SAP NetWeaver ABAP server is affected by a authorization check vulnerability as referenced in
the 3688703 advisory.

  - Due to a Missing Authorization Check vulnerability in Application Server ABAP and ABAP Platform, an
    authenticated attacker could misuse an RFC function to execute form routines (FORMs) in the ABAP system.
    Successful exploitation could allow the attacker to write or modify data accessible via FORMs and invoke
    system functionality exposed via FORMs, resulting in a high impact on integrity and availability, while
    confidentiality remains unaffected. (CVE-2026-0506)

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://me.sap.com/notes/3688703");
  script_set_attribute(attribute:"see_also", value:"https://url.sap/sapsecuritypatchday");
  script_set_attribute(attribute:"solution", value:
"Apply the appropriate patch according to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/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:N/AC:L/PR:L/UI:N/S:U/C:N/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-2026-0506");

  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:"2026/01/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/01/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/16");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:sap:netweaver_application_server");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

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

  script_dependencies("sap_netweaver_as_web_detect.nbin");
  script_require_keys("installed_sw/SAP Netweaver Application Server (AS)", "Settings/ParanoidReport");

  exit(0);
}

include('vcf_extras_sap.inc');

var app_info = vcf::sap_netweaver_as::get_app_info();

if (report_paranoia < 2)
  audit(AUDIT_PARANOID);

var fix = 'See vendor advisory';

# SAP_BASIS version ranges affected according to SAP note 3688703
var constraints = [
  {'equal' : '731', 'fixed_display' : fix },
  {'equal' : '740', 'fixed_display' : fix },
  {'equal' : '750', 'fixed_display' : fix },
  {'min_version' : '752', 'max_version' : '758', 'fixed_display' : fix },
  {'equal' : '816', 'fixed_display' : fix }
];

vcf::sap_netweaver_as::check_version_and_report(
  app_info:app_info,
  constraints:constraints,
  severity:SECURITY_HOLE,
  abap:TRUE
);