// For flags

CVE-2019-1672

Cisco Web Security Appliance Decryption Policy Bypass Vulnerability

Severity Score

5.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

A vulnerability in the Decryption Policy Default Action functionality of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass a configured drop policy and allow traffic onto the network that should have been denied. The vulnerability is due to the incorrect handling of SSL-encrypted traffic when Decrypt for End-User Notification is disabled in the configuration. An attacker could exploit this vulnerability by sending a SSL connection through the affected device. A successful exploit could allow the attacker to bypass a configured drop policy to block specific SSL connections. Releases 10.1.x and 10.5.x are affected.

Una vulnerabilidad en la funcionalidad Decryption Policy Default Action de Cisco Web Security Appliance (WSA) podría permitir que un atacante remoto no autenticado omita una política de anulación configurada y permita el tráfico en la red que debería no estar permitido. Esta vulnerabilidad se debe a la gestión inadecuada del tráfico cifrado por SSL cuando las notificaciones "Decrypt for End-User" están deshabilitadas en la configuración. Un atacante podría explotar esta vulnerabilidad enviando una conexión SSL a través de un dispositivo afectado. Su explotación con éxito podría permitir que el atacante omita una política de anulación configurada para bloquear conexiones SSL concretas. Las versiones 10.1.x y 10.5.x se han visto afectadas.

*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
  • 2018-12-06 CVE Reserved
  • 2019-02-08 CVE Published
  • 2024-06-29 EPSS Updated
  • 2024-11-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
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"
 Web Security Appliance
Search vendor "Cisco" for product "Web Security Appliance"
 10.1.0-204
Search vendor "Cisco" for product "Web Security Appliance" and version "10.1.0-204"
-
Affected
Cisco
Search vendor "Cisco"
 Web Security Appliance
Search vendor "Cisco" for product "Web Security Appliance"
 10.5.2-072
Search vendor "Cisco" for product "Web Security Appliance" and version "10.5.2-072"
-
Affected
Cisco
Search vendor "Cisco"
 Web Security Appliance
Search vendor "Cisco" for product "Web Security Appliance"
 11.5.1-fcs-115
Search vendor "Cisco" for product "Web Security Appliance" and version "11.5.1-fcs-115"
-
Affected