CVE-2021-1573

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services 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 web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Una vulnerabilidad en la interfaz de servicios web del software Cisco Adaptive Security Appliance (ASA) y del software Cisco Firepower Threat Defense (FTD) podría permitir a un atacante remoto no autenticado desencadenar una condición de denegación de servicio (DoS). Esta vulnerabilidad es debido a una comprobación inapropiada de entradas cuando son analizadas las peticiones HTTPS. Un atacante podría explotar esta vulnerabilidad mediante el envío de una petición HTTPS maliciosa a un dispositivo afectado. Una explotación con éxito podría permitir al atacante causar que el dispositivo se recargue, resultando en una condición de DoS

*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

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

2020-11-13 CVE Reserved
2022-01-11 CVE Published
2024-09-26 EPSS Updated
2024-11-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-121: Stack-based Buffer Overflow
CWE-787: Out-of-bounds Write

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-asafdt-webvpn-dos-KSqJAKPA	2023-08-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Adaptive Security Appliance Search vendor "Cisco" for product "Adaptive Security Appliance"				<= 9.7 Search vendor "Cisco" for product "Adaptive Security Appliance" and version " <= 9.7"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				<= 6.2.2 Search vendor "Cisco" for product "Firepower Threat Defense" and version " <= 6.2.2"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.2.3 < 6.4.0.13 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.3 < 6.4.0.13"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.5.0 < 6.6.5 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.5.0 < 6.6.5"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.7.0 < 6.7.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.7.0 < 6.7.0.3"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				7.0.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "7.0.0"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.8 < 9.8.4.40 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.8 < 9.8.4.40"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.9 < 9.12.4.26 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.9 < 9.12.4.26"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.13 < 9.14.3 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.13 < 9.14.3"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.15 < 9.15.1.17 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.15 < 9.15.1.17"		-		Affected
Cisco Search vendor "Cisco"		Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software"				>= 9.16 < 9.16.1.28 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.16 < 9.16.1.28"		-		Affected