1.
Suppressing HTTP Headers from
WebSphere Application Server
18 December 2013 Version 0.5
Dave Hay
IBM Software Services for WebSphere (ISSW)
david_hay@uk.ibm.com
+44 7802 918423

2.
The Problem
●
Our client has identified a risk, in terms of
providing too much information to a potential
attacker, due to WebSphere Application Server
(WAS) returning it's version string in the HTTP
headers returned from a simple HTTPS
request.

3.
This is what we see
●
This is from IBM BPM Standard 7.5.1.1
( Process Center )

4.
This is how we resolve it
●
●
WAS includes the ability to override certain
HTTP headers.
Overrides include: ServerHeaderValue – Allows Server Header to be set to a
custom string
RemoveServerHeader – Allows Server Header to be
completed removed
●
This is documented in the Information Center
( see Bibliography )

5.
How to set HTTP Headers - 1/2

6.
How to set HTTP Headers - 2/2
OR

7.
Example – Using
ServerHeaderValue

8.
Example – Using
RemoveServerHeader

9.
Backup
●
●
The same “risk” has been identified with IBM
HTTP Server.
This can be mitigated by adding: AddServerHeader Off
ServerTokens Prod
ServerSignature Off
to the IHS httpd.conf file.

10.
Bibliography
WAS 8.0 - Information Center - HTTP transport channel custom properties
WAS 7.0 – Information Center - HTTP transport custom properties
Apache Documentation - ServerSignature Directive
Apache Documentation - ServerTokens Directive
IHS Documentation - AddServerHeader Directive