CVE-2020-3500

Cisco StarOS IPv6 Denial of Service Vulnerability

Severity Score

8.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the IPv6 implementation of Cisco StarOS could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet to an affected device with the goal of reaching the vulnerable section of the input buffer. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.

Una vulnerabilidad en la implementación de IPv6 de Cisco StarOS podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) sobre un dispositivo afectado. La vulnerabilidad es debido a una comprobación insuficiente del tráfico IPv6 entrante. Un atacante podría explotar esta vulnerabilidad mediante el envío de un paquete IPv6 diseñado hacia un dispositivo afectado con el objetivo de llegar a la sección vulnerable del búfer de entrada. Una explotación con éxito podría permitir al atacante causar que el dispositivo se recargue, resultando en una condición de DoS. Esta vulnerabilidad es específica del tráfico IPv6. El tráfico IPv4 no está afectado.

*Credits: N/A

CVSS Scores

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

High

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:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-12 CVE Reserved
2020-08-17 CVE Published
2023-05-03 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr5k-ipv6-dos-ce3zhF8m	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	< 21.18.3 Search vendor "Cisco" for product "Staros" and version " < 21.18.3"	-	Affected	in	Cisco Search vendor "Cisco"	Virtualized Packet Core-single Instance Search vendor "Cisco" for product "Virtualized Packet Core-single Instance"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	< 21.18.3 Search vendor "Cisco" for product "Staros" and version " < 21.18.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5500 Search vendor "Cisco" for product "Asr 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Staros Search vendor "Cisco" for product "Staros"	< 21.18.3 Search vendor "Cisco" for product "Staros" and version " < 21.18.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asr 5700 Search vendor "Cisco" for product "Asr 5700"	-	-	Safe