CVE-2019-1886 HIGH

CVE-2019-1886: Cisco Web Security Appliance HTTPS Certificate Denial of Service Vulnerability

Vendor Cisco
Product Cisco Web Security Appliance (WSA)
Weakness CWE-20 · Input validation
Published July 4, 2019
Last update November 19, 2024

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

What the vulnerability does

01Description

A vulnerability in the HTTPS decryption feature of Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient validation of Secure Sockets Layer (SSL) server certificates. An attacker could exploit this vulnerability by installing a malformed certificate in a web server and sending a request to it through the Cisco WSA. A successful exploit could allow the attacker to cause an unexpected restart of the proxy process on an affected device.

Key dates

02Disclosure timeline

July 4, 2019 CVE published
November 19, 2024 Record updated