3.1 Low
CVSS3
Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
4.3 Medium
AI Score
Confidence
Low
2.9 Low
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:A/AC:M/Au:N/C:P/I:N/A:N
0.007 Low
EPSS
Percentile
79.5%
AVM FRITZ!Box 7581 and 7582 devices are prone to an information
disclosure vulnerability dubbed
# Copyright (C) 2020 Greenbone Networks GmbH
# 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-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
CPE = "cpe:/o:avm:fritz%21_os";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.108808");
script_version("2023-02-02T10:09:00+0000");
script_cve_id("CVE-2019-15126");
script_tag(name:"cvss_base", value:"2.9");
script_tag(name:"cvss_base_vector", value:"AV:A/AC:M/Au:N/C:P/I:N/A:N");
script_tag(name:"last_modification", value:"2023-02-02 10:09:00 +0000 (Thu, 02 Feb 2023)");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2020-08-11 19:15:00 +0000 (Tue, 11 Aug 2020)");
script_tag(name:"creation_date", value:"2020-06-29 10:38:30 +0000 (Mon, 29 Jun 2020)");
script_name("AVM FRITZ!Box 7581 and 7582 < 7.13 Information Disclosure Vulnerability (Kr00k)");
script_category(ACT_GATHER_INFO);
script_family("General");
script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
script_dependencies("gb_avm_fritz_box_detect.nasl");
script_mandatory_keys("avm/fritz/model", "avm/fritz/firmware_version");
script_xref(name:"URL", value:"https://en.avm.de/service/current-security-notifications/");
script_xref(name:"URL", value:"http://packetstormsecurity.com/files/156809/Broadcom-Wi-Fi-KR00K-Proof-Of-Concept.html");
script_xref(name:"URL", value:"https://www.eset.com/int/kr00k/");
script_xref(name:"URL", value:"https://www.welivesecurity.com/wp-content/uploads/2020/02/ESET_Kr00k.pdf");
script_tag(name:"summary", value:"AVM FRITZ!Box 7581 and 7582 devices are prone to an information
disclosure vulnerability dubbed 'Kr00k'.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"An issue was discovered on Broadcom Wi-Fi client devices.
Specifically timed and handcrafted traffic can cause internal errors (related to state
transitions) in a WLAN device.");
script_tag(name:"impact", value:"The flaw lead to improper layer 2 Wi-Fi encryption with a
consequent possibility of information disclosure over the air for a discrete set of traffic.");
script_tag(name:"affected", value:"AVM FRITZ!Box 7581 and 7582 devices running AVM FRITZ!OS before
version 7.13.");
script_tag(name:"solution", value:"Update to AVM FRITZ!OS 7.13 or later.");
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 );
fixes = make_array( "7581", "7.13",
"7582", "7.13" );
if( ! fixes[model] )
exit( 99 );
patch = fixes[model];
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 );
3.1 Low
CVSS3
Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
4.3 Medium
AI Score
Confidence
Low
2.9 Low
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:A/AC:M/Au:N/C:P/I:N/A:N
0.007 Low
EPSS
Percentile
79.5%