CVE-2021-1285

Multiple Cisco Products SNORT Ethernet Frame Decoder Denial of Service Vulnerability

Severity Score

7.4

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

Multiple Cisco products are affected by a vulnerability in the Ethernet Frame Decoder of the Snort detection engine that could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition.
The vulnerability is due to improper handling of error conditions when processing Ethernet frames. An attacker could exploit this vulnerability by sending malicious Ethernet frames through an affected device. A successful exploit could allow the attacker to exhaust disk space on the affected device, which could result in administrators being unable to log in to the device or the device being unable to boot up correctly.Note: Manual intervention is required to recover from this situation. Customers are advised to contact the Cisco Technical Assistance Center (TAC) to help recover a device in this condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Varios productos de Cisco se ven afectados por una vulnerabilidad en el decodificador de tramas Ethernet del motor de detección Snort que podría permitir que un atacante adyacente no autenticado provoque una condición de denegación de servicio (DoS). La vulnerabilidad se debe a un manejo inadecuado de las condiciones de error al procesar tramas Ethernet. Un atacante podría aprovechar esta vulnerabilidad enviando tramas Ethernet maliciosas a través de un dispositivo afectado. Una explotación exitosa podría permitir que el atacante agote el espacio en disco en el dispositivo afectado, lo que podría provocar que los administradores no puedan iniciar sesión en el dispositivo o que el dispositivo no pueda iniciarse correctamente. Nota: Se requiere intervención manual para recuperarse de esta situación. Se recomienda a los clientes que se comuniquen con el Centro de asistencia técnica (TAC) de Cisco para obtener ayuda para recuperar un dispositivo en esta condición. Cisco ha publicado actualizaciones de software que solucionan esta vulnerabilidad. No existen workarounds que solucionen esta vulnerabilidad.

*Credits: N/A

CVSS Scores

Ciscov3 7.4

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2020-11-13 CVE Reserved
2024-11-18 CVE Published
2024-11-18 CVE Updated
---------- EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (1)

URL	Tag	Source
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-ethernet-dos-HGXgJH8n

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				16.12.3 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "16.12.3"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				16.12.4 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "16.12.4"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				17.3.1 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.3.1"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				16.6.6 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "16.6.6"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				16.12.2 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "16.12.2"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				16.6.5 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "16.6.5"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				17.2.1 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.2.1"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				17.1.1 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.1.1"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				16.6.7 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "16.6.7"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				16.6.1 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "16.6.1"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				16.12.1 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "16.12.1"		en		Affected
Cisco Search vendor "Cisco"		Cisco UTD SNORT IPS Engine Software Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software"				17.3.2 Search vendor "Cisco" for product "Cisco UTD SNORT IPS Engine Software" and version "17.3.2"		en		Affected