CVE-2021-1352

Cisco IOS XE Software DECnet Phase IV/OSI Denial of Service Vulnerability

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

A vulnerability in the DECnet Phase IV and DECnet/OSI protocol processing of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation of DECnet traffic that is received by an affected device. An attacker could exploit this vulnerability by sending DECnet traffic to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Una vulnerabilidad en el procesamiento del protocolo DECnet Phase IV y DECnet/OSI del Software Cisco IOS XE, podría permitir a un atacante adyacente no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. La vulnerabilidad es debido a una comprobación de la entrada insuficiente del tráfico DECnet que recibe un dispositivo afectado. Un atacante podría explotar esta vulnerabilidad mediante el envío de tráfico DECnet a un dispositivo afectado. Una explotación con éxito podría permitir al atacante causar que el dispositivo afectado se recargue, dando como resultado una condición de DoS

*Credits: N/A

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2021-03-24 CVE Published
2023-12-08 EPSS Updated
2024-11-08 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-823: Use of Out-of-range Pointer Offset

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-iosxe-decnet-dos-cuPWDkyL	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"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.4.1 Search vendor "Cisco" for product "Ios Xe" and version "16.4.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.4.2 Search vendor "Cisco" for product "Ios Xe" and version "16.4.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.4.3 Search vendor "Cisco" for product "Ios Xe" and version "16.4.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.5.1 Search vendor "Cisco" for product "Ios Xe" and version "16.5.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.5.1a Search vendor "Cisco" for product "Ios Xe" and version "16.5.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.5.1b Search vendor "Cisco" for product "Ios Xe" and version "16.5.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.5.2 Search vendor "Cisco" for product "Ios Xe" and version "16.5.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.5.3 Search vendor "Cisco" for product "Ios Xe" and version "16.5.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.1 Search vendor "Cisco" for product "Ios Xe" and version "16.6.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.2 Search vendor "Cisco" for product "Ios Xe" and version "16.6.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.3 Search vendor "Cisco" for product "Ios Xe" and version "16.6.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.4 Search vendor "Cisco" for product "Ios Xe" and version "16.6.4"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.4a Search vendor "Cisco" for product "Ios Xe" and version "16.6.4a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.4s Search vendor "Cisco" for product "Ios Xe" and version "16.6.4s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.5 Search vendor "Cisco" for product "Ios Xe" and version "16.6.5"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.5a Search vendor "Cisco" for product "Ios Xe" and version "16.6.5a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.5b Search vendor "Cisco" for product "Ios Xe" and version "16.6.5b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.6 Search vendor "Cisco" for product "Ios Xe" and version "16.6.6"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.7 Search vendor "Cisco" for product "Ios Xe" and version "16.6.7"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.7a Search vendor "Cisco" for product "Ios Xe" and version "16.6.7a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.8 Search vendor "Cisco" for product "Ios Xe" and version "16.6.8"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "16.7.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.7.2 Search vendor "Cisco" for product "Ios Xe" and version "16.7.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.7.3 Search vendor "Cisco" for product "Ios Xe" and version "16.7.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "16.8.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1a Search vendor "Cisco" for product "Ios Xe" and version "16.8.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1b Search vendor "Cisco" for product "Ios Xe" and version "16.8.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1c Search vendor "Cisco" for product "Ios Xe" and version "16.8.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1s Search vendor "Cisco" for product "Ios Xe" and version "16.8.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.2 Search vendor "Cisco" for product "Ios Xe" and version "16.8.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.3 Search vendor "Cisco" for product "Ios Xe" and version "16.8.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1 Search vendor "Cisco" for product "Ios Xe" and version "16.9.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1a Search vendor "Cisco" for product "Ios Xe" and version "16.9.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1b Search vendor "Cisco" for product "Ios Xe" and version "16.9.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1c Search vendor "Cisco" for product "Ios Xe" and version "16.9.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1d Search vendor "Cisco" for product "Ios Xe" and version "16.9.1d"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.1s Search vendor "Cisco" for product "Ios Xe" and version "16.9.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.2 Search vendor "Cisco" for product "Ios Xe" and version "16.9.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.2a Search vendor "Cisco" for product "Ios Xe" and version "16.9.2a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.2s Search vendor "Cisco" for product "Ios Xe" and version "16.9.2s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.3 Search vendor "Cisco" for product "Ios Xe" and version "16.9.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.3a Search vendor "Cisco" for product "Ios Xe" and version "16.9.3a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.3h Search vendor "Cisco" for product "Ios Xe" and version "16.9.3h"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.3s Search vendor "Cisco" for product "Ios Xe" and version "16.9.3s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.4 Search vendor "Cisco" for product "Ios Xe" and version "16.9.4"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.4c Search vendor "Cisco" for product "Ios Xe" and version "16.9.4c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.5 Search vendor "Cisco" for product "Ios Xe" and version "16.9.5"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.5f Search vendor "Cisco" for product "Ios Xe" and version "16.9.5f"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.9.6 Search vendor "Cisco" for product "Ios Xe" and version "16.9.6"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1 Search vendor "Cisco" for product "Ios Xe" and version "16.10.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1a Search vendor "Cisco" for product "Ios Xe" and version "16.10.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1b Search vendor "Cisco" for product "Ios Xe" and version "16.10.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1e Search vendor "Cisco" for product "Ios Xe" and version "16.10.1e"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.1s Search vendor "Cisco" for product "Ios Xe" and version "16.10.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.2 Search vendor "Cisco" for product "Ios Xe" and version "16.10.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.10.3 Search vendor "Cisco" for product "Ios Xe" and version "16.10.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1 Search vendor "Cisco" for product "Ios Xe" and version "16.11.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1a Search vendor "Cisco" for product "Ios Xe" and version "16.11.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1b Search vendor "Cisco" for product "Ios Xe" and version "16.11.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1c Search vendor "Cisco" for product "Ios Xe" and version "16.11.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.1s Search vendor "Cisco" for product "Ios Xe" and version "16.11.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.11.2 Search vendor "Cisco" for product "Ios Xe" and version "16.11.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1 Search vendor "Cisco" for product "Ios Xe" and version "16.12.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1a Search vendor "Cisco" for product "Ios Xe" and version "16.12.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1c Search vendor "Cisco" for product "Ios Xe" and version "16.12.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1s Search vendor "Cisco" for product "Ios Xe" and version "16.12.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.1t Search vendor "Cisco" for product "Ios Xe" and version "16.12.1t"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.2 Search vendor "Cisco" for product "Ios Xe" and version "16.12.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.2a Search vendor "Cisco" for product "Ios Xe" and version "16.12.2a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.2s Search vendor "Cisco" for product "Ios Xe" and version "16.12.2s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.2t Search vendor "Cisco" for product "Ios Xe" and version "16.12.2t"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.3 Search vendor "Cisco" for product "Ios Xe" and version "16.12.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.3a Search vendor "Cisco" for product "Ios Xe" and version "16.12.3a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.3s Search vendor "Cisco" for product "Ios Xe" and version "16.12.3s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.4 Search vendor "Cisco" for product "Ios Xe" and version "16.12.4"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.12.4a Search vendor "Cisco" for product "Ios Xe" and version "16.12.4a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.1 Search vendor "Cisco" for product "Ios Xe" and version "17.1.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.1a Search vendor "Cisco" for product "Ios Xe" and version "17.1.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.1s Search vendor "Cisco" for product "Ios Xe" and version "17.1.1s"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.1t Search vendor "Cisco" for product "Ios Xe" and version "17.1.1t"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.1.2 Search vendor "Cisco" for product "Ios Xe" and version "17.1.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1 Search vendor "Cisco" for product "Ios Xe" and version "17.2.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1a Search vendor "Cisco" for product "Ios Xe" and version "17.2.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1r Search vendor "Cisco" for product "Ios Xe" and version "17.2.1r"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.1v Search vendor "Cisco" for product "Ios Xe" and version "17.2.1v"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.2 Search vendor "Cisco" for product "Ios Xe" and version "17.2.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.2.3 Search vendor "Cisco" for product "Ios Xe" and version "17.2.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1 Search vendor "Cisco" for product "Ios Xe" and version "17.3.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				17.3.1a Search vendor "Cisco" for product "Ios Xe" and version "17.3.1a"		-		Affected