CVE-2022-20715

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Remote Access SSL VPN 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

*SSVC

Descriptions

A vulnerability in the remote access SSL VPN features of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper validation of errors that are logged as a result of client connections that are made using remote access VPN. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to cause the affected device to restart, resulting in a DoS condition.

Una vulnerabilidad en las funciones VPN SSL de acceso remoto del software Cisco Adaptive Security Appliance (ASA) y del software Cisco Firepower Threat Defense (FTD) podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad es debido a que no son comprobados apropiadamente los errores que son registrados como resultado de las conexiones de los clientes que son realizadas mediante una VPN de acceso remoto. Un atacante podría explotar esta vulnerabilidad mediante el envío de peticiones diseñadas a un sistema afectado. Una explotación con éxito podría permitir al atacante causar que el dispositivo afectado sea reiniciado, resultando en una condición de DoS

*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

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-02 CVE Reserved
2022-05-03 CVE Published
2023-11-23 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
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-asa-dos-tL4uA4AA	2023-11-15

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"				< 6.4.0.15 Search vendor "Cisco" for product "Firepower Threat Defense" and version " < 6.4.0.15"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.5.0 < 6.6.5.2 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.5.0 < 6.6.5.2"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.7.0 < 7.0.2 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.7.0 < 7.0.2"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				7.1.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "7.1.0"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				< 9.8.4.44 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " < 9.8.4.44"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.9 < 9.12.4.38 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.9 < 9.12.4.38"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.13 < 9.14.4 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.13 < 9.14.4"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.15 < 9.15.1.21 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.15 < 9.15.1.21"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.16.0 < 9.16.2.14 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.16.0 < 9.16.2.14"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.17.0 < 9.17.1.7 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.17.0 < 9.17.1.7"		-		Affected