CVE-2020-3562

Cisco Firepower 2100 Series SSL/TLS Inspection 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

Attend

*SSVC

Descriptions

A vulnerability in the SSL/TLS inspection of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series firewalls could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation for certain fields of specific SSL/TLS messages. An attacker could exploit this vulnerability by sending a malformed SSL/TLS message through an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. No manual intervention is needed to recover the device after it has reloaded.

Una vulnerabilidad en la inspección SSL/TLS de Cisco Firepower Threat Defense (FTD) Software para los firewalls Cisco Firepower Serie 2100 podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. La vulnerabilidad es debido a una comprobación de entrada inapropiada para determinados campos de mensajes SSL/TLS específicos. Un atacante podría explotar esta vulnerabilidad mediante el envío de un mensaje SSL/TLS malformado por medio de un dispositivo afectado. Una explotación con éxito podría permitir a un atacante causar que el dispositivo afectado se recargue, resultando en una condición de DoS. No es requerida una intervención manual para recuperar el dispositivo después de que se haya recargado

*Credits: N/A

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

Medium

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
2020-10-21 CVE Published
2023-07-07 EPSS Updated
2024-11-13 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-ftd-ssl-dcrpt-dos-RYEkX4yy	2020-10-23

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.3.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.3.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2110 Search vendor "Cisco" for product "Firepower 2110"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.3.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.3.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2120 Search vendor "Cisco" for product "Firepower 2120"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.3.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.3.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2130 Search vendor "Cisco" for product "Firepower 2130"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.3.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.3.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2140 Search vendor "Cisco" for product "Firepower 2140"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.4.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.4.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2110 Search vendor "Cisco" for product "Firepower 2110"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.4.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.4.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2120 Search vendor "Cisco" for product "Firepower 2120"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.4.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.4.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2130 Search vendor "Cisco" for product "Firepower 2130"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.4.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.4.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2140 Search vendor "Cisco" for product "Firepower 2140"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.5.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.5.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2110 Search vendor "Cisco" for product "Firepower 2110"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.5.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.5.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2120 Search vendor "Cisco" for product "Firepower 2120"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.5.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.5.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2130 Search vendor "Cisco" for product "Firepower 2130"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	6.5.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.5.0"	-	Affected	in	Cisco Search vendor "Cisco"	Firepower 2140 Search vendor "Cisco" for product "Firepower 2140"	-	-	Safe