Multiple AVM FRITZ!Box WPA2 Key Reinstallation Vulnerabilities - KRACK

# SPDX-FileCopyrightText: 2017 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/o:avm:fritz%21_os";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108292");
  script_version("2025-09-10T05:38:24+0000");
  script_cve_id("CVE-2017-13077", "CVE-2017-13078", "CVE-2017-13079", "CVE-2017-13080",
                "CVE-2017-13081", "CVE-2017-13082", "CVE-2017-13084", "CVE-2017-13086",
                "CVE-2017-13087", "CVE-2017-13088");
  script_tag(name:"cvss_base", value:"5.8");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2025-09-10 05:38:24 +0000 (Wed, 10 Sep 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");
  script_tag(name:"creation_date", value:"2017-11-22 07:59:41 +0100 (Wed, 22 Nov 2017)");
  script_name("Multiple AVM FRITZ!Box WPA2 Key Reinstallation Vulnerabilities - KRACK");
  script_category(ACT_GATHER_INFO);
  script_family("General");
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_dependencies("gb_avm_fritz_box_consolidation.nasl");
  script_mandatory_keys("avm/fritz/model", "avm/fritz/firmware_version");

  script_xref(name:"URL", value:"https://avm.de/service/aktuelle-sicherheitshinweise/");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/101274");
  script_xref(name:"URL", value:"https://en.avm.de/service/current-security-notifications/");

  script_tag(name:"vuldetect", value:"Check the firmware version.");

  script_tag(name:"solution", value:"Update the firmware to version 6.92 or later.");

  script_tag(name:"summary", value:"WPA2 as used in several models of the AVM FRITZ!Box are prone to
  multiple security weaknesses aka Key Reinstallation Attacks (KRACK).");

  script_tag(name:"affected", value:"AVM FRITZ!Box 7590, 7580, 7560 and 7490 with a firmware below 6.92,
  if configured to access the internet provided by another router via wireless LAN uplink.");

  script_tag(name:"qod_type", value:"remote_banner");
  script_tag(name:"solution_type", value:"VendorFix");

  exit(0);
}

include("version_func.inc");
include("host_details.inc");

if( ! fw_version = get_app_version( cpe:CPE, nofork:TRUE ) ) exit( 0 );
if( ! model = get_kb_item( "avm/fritz/model" ) ) exit( 0 );

# Those got a fix from AVM but other models might be vulnerable as well
valid_models = make_list( "7590", "7580", "7560", "7490" );

foreach m( valid_models ) {
  if( egrep( string:model, pattern:'^' + m ) ) {
    vuln_model = TRUE;
    break;
  }
}

if( ! vuln_model ) exit( 0 );

patch = "6.92";
if( version_is_less( version:fw_version, test_version:patch ) ) {
  report  = 'Model:              ' + model + '\n';
  report += 'Installed Firmware: ' + fw_version + '\n';
  report += 'Fixed Firmware:     ' + patch;
  security_message( port:0, data:report );
  exit( 0 );
}

exit( 99 );