CVE-2019-12652

Cisco Catalyst 4000 Series Switches TCP Denial of Service Vulnerability

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

A vulnerability in the ingress packet processing function of Cisco IOS Software for Cisco Catalyst 4000 Series Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper resource allocation when processing TCP packets directed to the device on specific Cisco Catalyst 4000 Series Switches. An attacker could exploit this vulnerability by sending crafted TCP streams to an affected device. A successful exploit could cause the affected device to run out of buffer resources, impairing operations of control plane and management plane protocols, resulting in a DoS condition. This vulnerability can be triggered only by traffic that is destined to an affected device and cannot be exploited using traffic that transits an affected device.

Una vulnerabilidad en la función de procesamiento de paquetes de ingreso del software Cisco IOS para Cisco Catalyst 4000 Series Switches, 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 la asignación de recursos inapropiada cuando se procesan paquetes TCP direccionados al dispositivo sobre Cisco Catalyst 4000 Series Switches específicos. Un atacante podría explotar esta vulnerabilidad mediante el envío de secuencias TCP diseñadas hacia un dispositivo afectado. Una explotación con éxito podría causar que el dispositivo afectado se quede sin recursos de almacenamiento intermedio, perjudicando las operaciones del plano de control y los protocolos del plano de administración, resultando en una condición DoS. Esta vulnerabilidad solo puede ser activada por el tráfico que está destinado hacia un dispositivo afectado y no puede ser explotado utilizando el tráfico que transita en un dispositivo afectado.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

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:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2019-06-04 CVE Reserved
2019-09-25 CVE Published
2023-03-07 EPSS Updated
2024-11-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-399: Resource Management Errors

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-20190925-cat4000-tcp-dos	2020-10-08

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"	15.2\(3\)e1 Search vendor "Cisco" for product "Ios" and version "15.2\(3\)e1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4500 Supervisor Engine 6-e Search vendor "Cisco" for product "Catalyst 4500 Supervisor Engine 6-e"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(3\)e1 Search vendor "Cisco" for product "Ios" and version "15.2\(3\)e1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4500 Supervisor Engine 6l-e Search vendor "Cisco" for product "Catalyst 4500 Supervisor Engine 6l-e"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(3\)e1 Search vendor "Cisco" for product "Ios" and version "15.2\(3\)e1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4900m Search vendor "Cisco" for product "Catalyst 4900m"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(3\)e1 Search vendor "Cisco" for product "Ios" and version "15.2\(3\)e1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4948e Search vendor "Cisco" for product "Catalyst 4948e"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(3\)e1 Search vendor "Cisco" for product "Ios" and version "15.2\(3\)e1"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4948e-f Search vendor "Cisco" for product "Catalyst 4948e-f"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(4\)e3 Search vendor "Cisco" for product "Ios" and version "15.2\(4\)e3"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4500 Supervisor Engine 6-e Search vendor "Cisco" for product "Catalyst 4500 Supervisor Engine 6-e"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(4\)e3 Search vendor "Cisco" for product "Ios" and version "15.2\(4\)e3"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4500 Supervisor Engine 6l-e Search vendor "Cisco" for product "Catalyst 4500 Supervisor Engine 6l-e"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(4\)e3 Search vendor "Cisco" for product "Ios" and version "15.2\(4\)e3"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4900m Search vendor "Cisco" for product "Catalyst 4900m"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(4\)e3 Search vendor "Cisco" for product "Ios" and version "15.2\(4\)e3"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4948e Search vendor "Cisco" for product "Catalyst 4948e"	-	-	Safe
Cisco Search vendor "Cisco"	Ios Search vendor "Cisco" for product "Ios"	15.2\(4\)e3 Search vendor "Cisco" for product "Ios" and version "15.2\(4\)e3"	-	Affected	in	Cisco Search vendor "Cisco"	Catalyst 4948e-f Search vendor "Cisco" for product "Catalyst 4948e-f"	-	-	Safe