CVE-2018-0172

Cisco IOS and IOS XE Software Improper Input Validation Vulnerability

Severity Score

8.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

Act

*SSVC

Descriptions

A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of option 82 information that it receives in DHCP Version 4 (DHCPv4) packets from DHCP relay agents. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device. A successful exploit could allow the attacker to cause a heap overflow condition on the affected device, which will cause the device to reload and result in a DoS condition. Cisco Bug IDs: CSCvg62730.

Una vulnerabilidad en la funcionalidad de encapsulamiento de la opción 82 de DHCP en Cisco IOS Software y Cisco IOS XE Software podría permitir que un atacante remoto sin autenticar haga que el dispositivo afectado se reinicie, provocando una denegación de servicio (DoS) en consecuencia. La vulnerabilidad existe debido a que el software afectado realiza validación incompleta de entradas de la información de la opción 82 que recibe en los paquetes DHCPv4 (DHCP Version 4) de los agentes de reproducción DHCP. Un atacante podría explotar esta vulnerabilidad enviando un paquete DHCPv4 manipulado a un dispositivo afectado. Si se explota con éxito, esta vulnerabilidad podría permitir que el atacante provoque una condición de desbordamiento de memoria dinámica (heap) en el dispositivo afectado, lo que provocará que el dispositivo se recargue y desemboque en una condición de denegación de servicio (DoS). Cisco Bug IDs: CSCvg62730.

A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow for denial-of-service (DoS).

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Act

Exploitation

Active

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2017-11-27 CVE Reserved
2018-03-28 CVE Published
2022-03-03 Exploited in Wild
2022-03-17 KEV Due Date
2024-09-21 EPSS Updated
2024-11-13 CVE Updated
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-787: Out-of-bounds Write

CAPEC

References (6)

URL	Tag	Source
http://www.securityfocus.com/bid/103552	Third Party Advisory
http://www.securitytracker.com/id/1040591	Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04	Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05	Third Party Advisory
https://www.tenable.com/security/research/tra-2018-06	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr1	2020-09-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Armorstratix 5700 Search vendor "Rockwellautomation" for product "Allen-bradley Armorstratix 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 5400 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 5400"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 5410 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 5410"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 5700 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 8000 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 8000"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 8300 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 8300"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Armorstratix 5700 Search vendor "Rockwellautomation" for product "Allen-bradley Armorstratix 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 5400 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 5400"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 5410 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 5410"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 5700 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 5700"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 8000 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 8000"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Xe Search vendor "Cisco" for product "Ios Xe"	-	-	Affected	in	Rockwellautomation Search vendor "Rockwellautomation"	Allen-bradley Stratix 8300 Search vendor "Rockwellautomation" for product "Allen-bradley Stratix 8300"	-	-	Safe
Cisco Search vendor "Cisco"		Ios Search vendor "Cisco" for product "Ios"				-		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				-		-		Affected