CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:A/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
22.5%
According to its self-reported version, Cisco IOS XE Software is affected by following vulnerability
Please see the included Cisco BIDs and Cisco Security Advisory for more information
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(127916);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/03");
script_cve_id("CVE-2019-1750");
script_bugtraq_id(107607);
script_xref(name:"CISCO-BUG-ID", value:"CSCvk24566");
script_xref(name:"CISCO-SA", value:"cisco-sa-20190327-evss");
script_name(english:"Cisco IOS XE Software Catalyst 4500 Cisco Discovery Protocol Denial of Service Vulnerability");
script_summary(english:"Checks the version of Cisco IOS XE Software");
script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch");
script_set_attribute(attribute:"description", value:
"According to its self-reported version, Cisco IOS XE Software is
affected by following vulnerability
- A vulnerability in the Easy Virtual Switching System
(VSS) of Cisco IOS XE Software on Catalyst 4500 Series
Switches could allow an unauthenticated, adjacent
attacker to cause the switches to reload.The
vulnerability is due to incomplete error handling when
processing Cisco Discovery Protocol (CDP) packets used
with the Easy Virtual Switching System. An attacker
could exploit this vulnerability by sending a specially
crafted CDP packet. An exploit could allow the attacker
to cause the device to reload, resulting in a denial of
service (DoS) condition. (CVE-2019-1750)
Please see the included Cisco BIDs and Cisco Security Advisory for
more information");
# https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-evss
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?04399ca8");
script_set_attribute(attribute:"see_also", value:"http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-71135");
script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk24566");
script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID
CSCvk24566");
script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-1750");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_cwe_id(20);
script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/27");
script_set_attribute(attribute:"patch_publication_date", value:"2019/03/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/20");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios_xe");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CISCO");
script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("cisco_ios_xe_version.nasl");
script_require_keys("Host/Cisco/IOS-XE/Version", "Host/Cisco/IOS-XE/Model");
exit(0);
}
include('cisco_workarounds.inc');
include('ccf.inc');
product_info = cisco::get_product_info(name:'Cisco IOS XE Software');
device_model = get_kb_item_or_exit('Host/Cisco/device_model');
# e.g. Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.03.00.SG RELEASE SOFTWARE (fc3)
# model string is 'Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M)'
if (device_model !~ "cat" || product_info.model !~ "45[0-9]{2}" )
audit(AUDIT_HOST_NOT, 'affected');
version_list=make_list(
'3.9.2bE',
'3.9.2E',
'3.9.1E',
'3.9.0E',
'3.8.7E',
'3.8.6E',
'3.8.5aE',
'3.8.5E',
'3.8.4E',
'3.8.3E',
'3.8.2E',
'3.8.1E',
'3.8.0E',
'3.7.3E',
'3.7.2E',
'3.7.1E',
'3.7.0E',
'3.6.9E',
'3.6.8E',
'3.6.7bE',
'3.6.7aE',
'3.6.7E',
'3.6.6E',
'3.6.5bE',
'3.6.5aE',
'3.6.5E',
'3.6.4E',
'3.6.3E',
'3.6.2aE',
'3.6.2E',
'3.6.1E',
'3.6.10E',
'3.6.0bE',
'3.6.0aE',
'3.6.0E',
'3.10.2E',
'3.10.1sE',
'3.10.1aE',
'3.10.1E',
'3.10.0cE',
'3.10.0E',
'16.9.2h'
);
workarounds = make_list(CISCO_WORKAROUNDS['vss']);
workaround_params = make_list();
reporting = make_array(
'port' , product_info['port'],
'severity' , SECURITY_WARNING,
'version' , product_info['version'],
'bug_id' , 'CSCvk24566'
);
cisco::check_and_report(product_info:product_info, workarounds:workarounds, workaround_params:workaround_params, reporting:reporting, vuln_versions:version_list);
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:A/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS
Percentile
22.5%