// For flags

CVE-2021-34704

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

0
*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 la recarga del dispositivo, resultando en una condición de DoS

*Credits: Nikita Abramov of Positive Technologies
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
  • 2021-06-15 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
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"
 >= 6.7.0 < 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"
 >= 9.15 < 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 < 9.16.2
Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.16 < 9.16.2"
-
Affected