SAP NetWeaver AS ABAP XML Signature Wrapping (3697567)

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

include('compat.inc');

if (description)
{
  script_id(298966);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/16");

  script_cve_id("CVE-2026-23687");
  script_xref(name:"IAVA", value:"2026-A-0136");

  script_name(english:"SAP NetWeaver AS ABAP XML Signature Wrapping (3697567)");

  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 as disclosed in the SAP Security Patch Day February 2026:

  - SAP NetWeaver AS ABAP and ABAP Platform is affected by an XML signature wrapping vulnerability. An
    attacker could exploit this to manipulate XML documents in a way that allows them to bypass signature
    validation, potentially leading to unauthorized access or privilege escalation. (CVE-2026-23687)

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/3697567");
  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_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: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-2026-23687");

  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:"2026/02/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/13");

  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' : '700', 'fixed_display' : fix },
  {'equal' : '701', 'fixed_display' : fix },
  {'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' : '804', 'fixed_display' : fix },
  {'equal' : '916', 'fixed_display' : fix },
  {'equal' : '917', 'fixed_display' : fix },
  {'equal' : '918', 'fixed_display' : fix }
];

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