SAP NetWeaver AS ABAP URL Redirection (3258950, 2872782)

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

include('compat.inc');

if (description)
{
  script_id(169454);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/01/03");

  script_cve_id("CVE-2020-6215");
  script_xref(name:"IAVA", value:"2022-A-0516");

  script_name(english:"SAP NetWeaver AS ABAP URL Redirection (3258950, 2872782)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SAP NetWeaver server is affected by a URL redirection vulnerability.");
  script_set_attribute(attribute:"description", value:
"SAP NetWeaver AS ABAP allows an unauthenticated malicious user to redirect users to an untrusted site through a 
malicious link, due to insufficient input validation. The malicious user can view or modify information causing a
limited impact on the confidentiality and the integrity of the application.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://www.sap.com/documents/2022/02/fa865ea4-167e-0010-bca6-c68f7e60039b.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?18f404d5");
  script_set_attribute(attribute:"solution", value:
"Apply the appropriate patch according to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/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:N/UI:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-6215");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/12/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/12/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/01/03");

  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) 2022-2023 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();

# security note 2872782 originally covered versions 700, 701, 702, 730, 731, 740, 750, 751, 752, 753, 754
# update 1 to 2872782 aka security note 3258950 includes all of the previous versions plus 755, 756, 757
var fix = 'See vendor advisory';
var constraints = [
    {'equal' : '700', 'fixed_display' : fix },
    {'equal' : '701', 'fixed_display' : fix },
    {'equal' : '702', '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 },
    {'equal' : '757', 'fixed_display' : fix },
  ];

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