CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
77.8%
A vulnerability in the processing of Network Time Protocol (NTP)
packets by Cisco IOS XE could allow an unauthenticated, remote attacker to cause an interface wedge and an
eventual denial of service (DoS) condition on the affected device.
The vulnerability is due to insufficient checks on clearing the invalid NTP packets from the
interface queue. An attacker could exploit this vulnerability by sending a number of crafted NTP
packets to be processed by an affected device. An exploit could allow the attacker to cause an
interface wedge and an eventual denial of service (DoS) condition on the affected device.
Cisco has released software updates that address this vulnerability. There are no workarounds that
address this vulnerability. However, there is a mitigation for this vulnerability.
# SPDX-FileCopyrightText: 2016 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:cisco:ios_xe";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.106175");
script_cve_id("CVE-2016-1478");
script_tag(name:"cvss_base", value:"7.8");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_version("2023-07-21T05:05:22+0000");
script_name("Cisco IOS XE Software Crafted Network Time Protocol Packets Denial of Service Vulnerability");
script_xref(name:"URL", value:"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160804-wedge");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");
script_tag(name:"summary", value:"A vulnerability in the processing of Network Time Protocol (NTP)
packets by Cisco IOS XE could allow an unauthenticated, remote attacker to cause an interface wedge and an
eventual denial of service (DoS) condition on the affected device.
The vulnerability is due to insufficient checks on clearing the invalid NTP packets from the
interface queue. An attacker could exploit this vulnerability by sending a number of crafted NTP
packets to be processed by an affected device. An exploit could allow the attacker to cause an
interface wedge and an eventual denial of service (DoS) condition on the affected device.
Cisco has released software updates that address this vulnerability. There are no workarounds that
address this vulnerability. However, there is a mitigation for this vulnerability.");
script_tag(name:"qod_type", value:"package");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"last_modification", value:"2023-07-21 05:05:22 +0000 (Fri, 21 Jul 2023)");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2017-08-16 01:29:00 +0000 (Wed, 16 Aug 2017)");
script_tag(name:"creation_date", value:"2016-08-10 15:45:16 +0700 (Wed, 10 Aug 2016)");
script_category(ACT_GATHER_INFO);
script_family("CISCO");
script_copyright("Copyright (C) 2016 Greenbone AG");
script_dependencies("gb_cisco_ios_xe_consolidation.nasl");
script_mandatory_keys("cisco/ios_xe/detected");
exit(0);
}
include("host_details.inc");
include("version_func.inc");
if( ! version = get_app_version( cpe:CPE, nofork:TRUE ) )
exit( 0 );
affected = make_list(
'3.16.3S',
'3.17.2S',
'3.18.1S' );
foreach af ( affected )
{
if( version == af )
{
report = report_fixed_ver( installed_version:version, fixed_version:"See advisory" );
security_message( port:0, data:report );
exit( 0 );
}
}
exit( 99 );
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
77.8%