// For flags

CVE-2020-3285

Cisco Firepower Threat Defense Software SSL/TLS URL Category Bypass Vulnerability

Severity Score

5.8
*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 Transport Layer Security version 1.3 (TLS 1.3) policy with URL category functionality for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured TLS 1.3 policy to block traffic for a specific URL. The vulnerability is due to a logic error with Snort handling of the connection with the TLS 1.3 policy and URL category configuration. An attacker could exploit this vulnerability by sending crafted TLS 1.3 connections to an affected device. A successful exploit could allow the attacker to bypass the TLS 1.3 policy and access URLs that are outside the affected device and normally would be dropped.

Una vulnerabilidad en la política Transport Layer Security versión 1.3 (TLS 1.3) con funcionalidad URL category para el Cisco Firepower Threat Defense (FTD) Software, podría permitir a un atacante remoto no autenticado omitir una política TLS versión 1.3 configurada para bloquear el tráfico de una URL específica. La vulnerabilidad es debido a un error lógico con el manejo de la conexión de Snort con la política TLS versión 1.3 y la configuración de URL category. Un atacante podría explotar esta vulnerabilidad mediante el envío de conexiones TLS versión 1.3 diseñadas hacia un dispositivo afectado. Una explotación con éxito podría permitir a un atacante omitir la política TLS versión 1.3 y acceder a las URL que están fuera del dispositivo afectado y que normalmente se descartarían.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* 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
  • 2020-05-06 CVE Published
  • 2023-03-07 EPSS Updated
  • 2024-11-15 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-693: Protection Mechanism Failure
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"
 >= 6.4.0 <= 6.4.0.8
Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.4.0 <= 6.4.0.8"
-
Affected