NVD

CVE-2018-0173 Detail

Description

A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP Version 4 (DHCPv4) packets could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a Relay Reply denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of encapsulated option 82 information that it receives in DHCPOFFER messages from DHCPv4 servers. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device, which the device would then forward to a DHCPv4 server. When the affected software processes the option 82 information that is encapsulated in the response from the server, an error could occur. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvg62754.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 8.6 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 7.8 HIGH

Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://www.securityfocus.com/bid/103545	Broken Link Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/103545	Broken Link Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040591	Broken Link Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040591	Broken Link Third Party Advisory VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04	Third Party Advisory US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04	Third Party Advisory US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05	Third Party Advisory US Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05	Third Party Advisory US Government Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr2	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr2	Vendor Advisory
https://www.tenable.com/security/research/tra-2018-06	Third Party Advisory
https://www.tenable.com/security/research/tra-2018-06	Third Party Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name	Date Added	Due Date	Required Action
Cisco IOS and IOS XE Software Improper Input Validation Vulnerability	03/03/2022	03/17/2022	Apply updates per vendor instructions.

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-20	Improper Input Validation	NIST Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

9 change records found show changes

Modified Analysis by NIST 7/24/2024 10:23:20 AM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Removed	CVSS V3	NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Changed	CPE Configuration	Record truncated, showing 500 of 637 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios:denali-16.3.4::::::: cpe:2.3:o:cisco:ios_xe:denali-16.3.4::::::: OR cpe:2.3:h:rockwellautomation:allen-bradley_armorstratix_5700:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5400:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5410:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5700:-:::::::* cpe:2.3:h:rockwe	Record truncated, showing 500 of 611 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios::::::::* versions up to (including) 15.2\(6\)e0a cpe:2.3:o:cisco:ios_xe::::::::* versions up to (including) 15.2\(6\)e0a OR cpe:2.3:h:rockwellautomation:allen-bradley_armorstratix_5700:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5400:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5410:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios::::::::* versions up to (including) 15.2\(4a\)ea5 cpe:2.3:o:cisco:ios_xe::::::::* versions up to (including) 15.2\(4a\)ea5 OR cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8300:-:::::::*
Changed	Reference Type	http://www.securityfocus.com/bid/103545 Third Party Advisory, VDB Entry	http://www.securityfocus.com/bid/103545 Broken Link, Third Party Advisory, VDB Entry
Changed	Reference Type	http://www.securitytracker.com/id/1040591 Third Party Advisory, VDB Entry	http://www.securitytracker.com/id/1040591 Broken Link, Third Party Advisory, VDB Entry

Initial Analysis by NIST 4/23/2018 4:37:42 PM

Action	Type	Old Value	New Value
Added	CVSS V3		AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Added	CVSS V2		(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Added	CWE		CWE-20
Added	CPE Configuration		Record truncated, showing 500 of 960 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios:denali-16.3.4::::::: cpe:2.3:o:cisco:ios_xe:denali-16.3.4::::::: OR cpe:2.3:h:cisco:4321_integrated_services_router:-:::::::* cpe:2.3:h:cisco:4331_integrated_services_router:-:::::::* cpe:2.3:h:cisco:4351_integrated_services_router:-:::::::* cpe:2.3:h:cisco:4431_integrated_services_router:-:::::::* cpe:2.3:h:cisco:4451-x_integrated_services_router:-:*
Added	CPE Configuration		Record truncated, showing 500 of 637 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios:denali-16.3.4::::::: cpe:2.3:o:cisco:ios_xe:denali-16.3.4::::::: OR cpe:2.3:h:rockwellautomation:allen-bradley_armorstratix_5700:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5400:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5410:-:::::::* cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5700:-:::::::* cpe:2.3:h:rockwe
Changed	Reference Type	http://www.securityfocus.com/bid/103545 No Types Assigned	http://www.securityfocus.com/bid/103545 Third Party Advisory, VDB Entry
Changed	Reference Type	http://www.securitytracker.com/id/1040591 No Types Assigned	http://www.securitytracker.com/id/1040591 Third Party Advisory, VDB Entry
Changed	Reference Type	https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 No Types Assigned	https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party Advisory, US Government Resource
Changed	Reference Type	https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 No Types Assigned	https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party Advisory, US Government Resource
Changed	Reference Type	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr2 No Types Assigned	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr2 Vendor Advisory
Changed	Reference Type	https://www.tenable.com/security/research/tra-2018-06 No Types Assigned	https://www.tenable.com/security/research/tra-2018-06 Third Party Advisory

Quick Info

CVE Dictionary Entry:
CVE-2018-0173
NVD Published Date:
03/28/2018
NVD Last Modified:
01/27/2025
Source:
Cisco Systems, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2018-0173 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

Modified Analysis by NIST 1/27/2025 3:08:20 PM

CVE Modified by CVE 11/20/2024 10:37:39 PM

Modified Analysis by NIST 7/24/2024 10:23:20 AM

CVE Modified by Cisco Systems, Inc. 5/14/2024 12:50:31 AM

CVE Modified by Cisco Systems, Inc. 10/09/2019 7:31:23 PM

Initial Analysis by NIST 4/23/2018 4:37:42 PM

CVE Modified by Cisco Systems, Inc. 4/19/2018 9:29:21 PM

CVE Modified by Cisco Systems, Inc. 3/30/2018 9:29:02 PM

CVE Modified by Cisco Systems, Inc. 3/29/2018 9:29:02 PM

Quick Info