SAP NetWeaver AS ABAP and Code Injection (3123196)

##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(161664);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/31");

  script_cve_id("CVE-2021-44235");
  script_xref(name:"IAVA", value:"2021-A-0599");

  script_name(english:"SAP NetWeaver AS ABAP and Code Injection (3123196)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SAP NetWeaver server is affected by a code injection vulnerability.");
  script_set_attribute(attribute:"description", value:
"A code injection vulnerability exists in SAP NetWeaver Application Server ABAP. This could allow an attacker with 
high privileges and has direct access to SAP System, to inject code when executing with a certain transaction class 
builder. This could allow execution of arbitrary commands on the operating system, that could highly impact the 
Confidentiality, Integrity and Availability of the system.

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://launchpad.support.sap.com/#/notes/3123196");
  # https://wiki.scn.sap.com/wiki/display/PSR/SAP+Security+Patch+Day+-+December+2021
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e388843b");
  script_set_attribute(attribute:"solution", value:
"Apply the appropriate patch according to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/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:L/AC:L/PR:H/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-2021-44235");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/12/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/12/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/30");

  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) 2022 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' : '710', 'fixed_display' : fix },
    {'equal' : '730', '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 }
  ];

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