Fortinet Discovers Oracle Subdomain Takeover Vulnerability


Fortinet's FortiGuard Labs has discovered the subdomain takeover vulnerability. is part of Oracle, an American multinational computer technology company.

The subdomain takeover vulnerability is caused by a misconfigured DNS entry. It exists because is using the Microsoft Azure Domain Controller, pointing one of its subdomains to an unregistered Azure subdomain. As a result, it can allow attackers to hijack cookies, bypass Cross-Origin Resource Sharing (CORS), bypass Content-Security Policies (CSP), cheat the password manager applications, intercept emails, etc. by registering the subdomain.


The vendor has fixed the issue since 02/07/2019.


Fortinet reported the vulnerability to Oracle on January 26, 2019.

Oracle confirmed the vulnerability on  February 7, 2019.

Oracle patched the vulnerability on February 7, 2019.


This vulnerability was discovered by Zhouyuan Yang of Fortinet's FortiGuard Labs.

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.