Information Disclosure via X-BEServer Header

Description

The 'X-BEServer' header may disclose the back-end server name or other internal details about the server infrastructure. Such information can aid attackers in targeting known vulnerabilities, default configurations, or specific product exploits. By identifying the back-end server technology, adversaries can craft more precise attacks, potentially leading to unauthorized access, data exposure, or service disruptions. Moreover, revealing this header undermines security by providing unnecessary insight into the application’s internal architecture, allowing malicious actors to focus on servers known to be susceptible to particular exploits or misconfigurations.

Remediation

Remove or mask the 'X-BEServer' header in your application or server configuration to prevent external users from discovering sensitive infrastructure details. Ensure that proxies, load balancers, or CDNs do not inadvertently re-inject or pass through this header. Keep back-end server software updated with the latest patches to reduce the risk of known exploits being used. If needed, deploy a Web Application Firewall (WAF) or intrusion detection system to monitor and block suspicious requests targeting back-end components. Periodically audit response headers and server configurations to confirm no sensitive implementation details are unintentionally exposed.

References

Severity

Owasp

Code: A05:2021

Category: Security Misconfiguration

Classification