SAP NetWeaver AS ABAP XML Signature Wrapping in SAML Authentication (3746332)

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

include('compat.inc');

if (description)
{
  script_id(320858);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/12");

  script_cve_id("CVE-2026-44748");
  script_xref(name:"IAVA", value:"2026-A-0556");

  script_name(english:"SAP NetWeaver AS ABAP XML Signature Wrapping in SAML Authentication (3746332)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SAP NetWeaver ABAP server is affected by an XML signature wrapping vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of SAP NetWeaver AS ABAP and ABAP Platform detected on the remote host is affected by an XML signature
wrapping vulnerability in SAML authentication as referenced in SAP Security Note 3746332:

  - SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated attacker with normal
    privileges to obtain a valid signed message and send modified signed XML documents to the verifier. This
    may result in acceptance of tampered identity information leading to unauthorized access to sensitive
    user data and potential disruption of normal system usage. This causes a high impact on confidentiality,
    integrity and availability of the application. (CVE-2026-44748)

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/3746332");
  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:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-44748");

  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:"2026/06/12");

  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");
  script_require_ports("Services/www", 80, 443, 8000, 50000);

  exit(0);
}

include('vcf_extras_sap.inc');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

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

var fix = 'See vendor advisory';
var constraints = [
  {'equal' : '702', 'fixed_display' : fix },
  {'equal' : '731', 'fixed_display' : fix },
  {'equal' : '740', 'fixed_display' : fix },
  {'equal' : '750', 'fixed_display' : fix },
  {'equal' : '751', 'fixed_display' : fix },
  {'equal' : '752', 'fixed_display' : fix },
  {'equal' : '753', 'fixed_display' : fix },
  {'equal' : '754', 'fixed_display' : fix },
  {'equal' : '755', 'fixed_display' : fix },
  {'equal' : '756', 'fixed_display' : fix },
  {'equal' : '757', 'fixed_display' : fix },
  {'equal' : '758', 'fixed_display' : fix },
  {'equal' : '816', 'fixed_display' : fix },
  {'equal' : '918', 'fixed_display' : fix },
  {'equal' : '919', 'fixed_display' : fix }
];

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