CVE-2020-3574

Cisco IP Phone TCP Packet Flood 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 TCP packet processing functionality of Cisco IP Phones could allow an unauthenticated, remote attacker to cause the phone to stop responding to incoming calls, drop connected calls, or unexpectedly reload. The vulnerability is due to insufficient TCP ingress packet rate limiting. An attacker could exploit this vulnerability by sending a high and sustained rate of crafted TCP traffic to the targeted device. A successful exploit could allow the attacker to impact operations of the phone or cause the phone to reload, leading to a denial of service (DoS) condition.

Una vulnerabilidad en la funcionalidad TCP packet processing de Cisco IP Phones, podría permitir a un atacante remoto no autenticado causar que el teléfono dejara de responder a las llamadas entrantes, abandonara las llamadas conectadas o se recargara inesperadamente. La vulnerabilidad es debido a una limitación insuficiente de la tasa de paquetes de entrada TCP. Un atacante podría explotar esta vulnerabilidad mediante el envío una tasa alta y sostenida de tráfico TCP diseñado hacia el dispositivo apuntado. Una explotación con éxito podría permitir al atacante afectar las operaciones del teléfono o hacer que el teléfono se recargue, dando lugar a una condición de denegación de servicio (DoS)

*Credits: N/A

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

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

2019-12-12 CVE Reserved
2020-11-06 CVE Published
2023-07-23 EPSS Updated
2024-11-13 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-371: State Issues

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phone-flood-dos-YnU9EXOv	2023-11-07

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"	Ip Dect 210 Firmware Search vendor "Cisco" for product "Ip Dect 210 Firmware"	< 4.8.1 Search vendor "Cisco" for product "Ip Dect 210 Firmware" and version " < 4.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ip Dect 210 Search vendor "Cisco" for product "Ip Dect 210"	-	-	Safe
Cisco Search vendor "Cisco"	Ip Dect 6825 Firmware Search vendor "Cisco" for product "Ip Dect 6825 Firmware"	< 4.8.1 Search vendor "Cisco" for product "Ip Dect 6825 Firmware" and version " < 4.8.1"	-	Affected	in	Cisco Search vendor "Cisco"	Ip Dect 6825 Search vendor "Cisco" for product "Ip Dect 6825"	-	-	Safe
Cisco Search vendor "Cisco"	Ip Phone 8811 Firmware Search vendor "Cisco" for product "Ip Phone 8811 Firmware"	< 11.3.2 Search vendor "Cisco" for product "Ip Phone 8811 Firmware" and version " < 11.3.2"	-	Affected	in	Cisco Search vendor "Cisco"	Ip Phone 8811 Search vendor "Cisco" for product "Ip Phone 8811"	-	-	Safe
Cisco Search vendor "Cisco"	Ip Phone 8841 Firmware Search vendor "Cisco" for product "Ip Phone 8841 Firmware"	< 11.3.2 Search vendor "Cisco" for product "Ip Phone 8841 Firmware" and version " < 11.3.2"	-	Affected	in	Cisco Search vendor "Cisco"	Ip Phone 8841 Search vendor "Cisco" for product "Ip Phone 8841"	-	-	Safe
Cisco Search vendor "Cisco"	Ip Phone 8851 Firmware Search vendor "Cisco" for product "Ip Phone 8851 Firmware"	< 11.3.2 Search vendor "Cisco" for product "Ip Phone 8851 Firmware" and version " < 11.3.2"	-	Affected	in	Cisco Search vendor "Cisco"	Ip Phone 8851 Search vendor "Cisco" for product "Ip Phone 8851"	-	-	Safe
Cisco Search vendor "Cisco"	Ip Phone 8861 Firmware Search vendor "Cisco" for product "Ip Phone 8861 Firmware"	< 11.3.2 Search vendor "Cisco" for product "Ip Phone 8861 Firmware" and version " < 11.3.2"	-	Affected	in	Cisco Search vendor "Cisco"	Ip Phone 8861 Search vendor "Cisco" for product "Ip Phone 8861"	-	-	Safe
Cisco Search vendor "Cisco"	Unified Ip Conference Phone 8831 Firmware Search vendor "Cisco" for product "Unified Ip Conference Phone 8831 Firmware"	9.3\(4\) Search vendor "Cisco" for product "Unified Ip Conference Phone 8831 Firmware" and version "9.3\(4\)"	servicerelease3	Affected	in	Cisco Search vendor "Cisco"	Unified Ip Conference Phone 8831 Search vendor "Cisco" for product "Unified Ip Conference Phone 8831"	-	-	Safe
Cisco Search vendor "Cisco"	Webex Room Phone Firmware Search vendor "Cisco" for product "Webex Room Phone Firmware"	< 1.2.0 Search vendor "Cisco" for product "Webex Room Phone Firmware" and version " < 1.2.0"	-	Affected	in	Cisco Search vendor "Cisco"	Webex Room Phone Search vendor "Cisco" for product "Webex Room Phone"	-	-	Safe