The A10 Networks ADC, when used to load balance web applications, must strip HTTP response headers.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-237040	AADC-AG-000062	SV-237040r639567_rule		Medium

Description

Providing too much information in error messages risks compromising the data and security of the application and system. HTTP response headers can disclose vulnerabilities about a web server. This information can be used by an attacker. The A10 Networks ADC can filter response headers; this removes the web server’s identifying headers in outgoing responses (such as Server, X-Powered-By, and X-AspNet-Version).

STIG	Date
A10 Networks ADC ALG Security Technical Implementation Guide	2021-03-25

Details

Check Text ( C-40259r639565_chk )
If the device is not used to load balance web servers, this is not applicable. If the device is used to load balance web servers, verify that the A10 Networks ADC strips HTTP response headers. The following command displays WAF templates: show slb template waf If the configured WAF templates do not have the "filter-resp-hdrs" option configured, this is a finding.

Fix Text (F-40222r639566_fix)
If the device is used to load balance web servers, configure the device to strip HTTP response headers. The following command configures a WAF template and includes the option to strip HTTP response headers: slb template waf filter-resp-hdrs