SAP NetWeaver AS ABAP Command Injection (June 2021)

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

include('deprecated_nasl_level.inc');

include('compat.inc');

if (description)
{
  script_id(150719);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/07/15");

  script_cve_id("CVE-2021-33663");
  script_xref(name:"IAVA", value:"2021-A-0281");

  script_name(english:"SAP NetWeaver AS ABAP Command Injection (June 2021)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SAP NetWeaver server is affected by a Command Injection vulnerability.");
  script_set_attribute(attribute:"description", value:
"A command injection vulnerability exists in SAP NetWeaver AS ABAP due to improperly restricting I/O buffering. An 
unauthenticated, remote attacker can exploit this, to insert cleartext commands into encrypted SMTP sessions over the 
network which can partially impact 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.");
  script_set_attribute(attribute:"see_also", value:"https://launchpad.support.sap.com/#/notes/3030604");
  # https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?98cbee9d");
  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:N/C:N/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:N/S:U/C:N/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-2021-33663");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/06/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/11");

  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) 2021 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' : '7.22', 'fixed_display' : fix },
    {'equal' : '7.22EXT', 'fixed_display' : fix },
    {'equal' : '7.49', 'fixed_display' : fix },
    {'equal' : '7.53', 'fixed_display' : fix },
    {'equal' : '7.73', 'fixed_display' : fix },
    {'equal' : '7.77', 'fixed_display' : fix },
    {'equal' : '7.81', 'fixed_display' : fix },
    {'equal' : '7.82', 'fixed_display' : fix },
    {'equal' : '7.83', 'fixed_display' : fix },
    {'equal' : '7.84', 'fixed_display' : fix },
    {'equal' : '8.04', 'fixed_display' : fix }
  ];

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