WhosON with SRI

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   At a recent Penetration Test scan, it was reported that  'external script not using integrity'

Description:
The remote host may be vulnerable to payment entry data exfiltration due to javascript included from potentially
untrusted and unverified third parties script src.
If the host is controlled by a 3rd party, ensure that the 3rd party is PCI DSS compliant.

https://{whosonserver}/include.js?domain=https://yourhost.com

Looking at using SRI (Subresource Integrity)  https://www.srihash.org/    however, trying to generate a hash,  I get the following issue:  "Error: this resource is not eligible for integrity checks. See https://enable-cors.org/server.html"

How is it therefore possible to resolve this penetration test issue? are we able to apply SRI at all?

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Brian.Dukes Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 03 May 2019 Location: Portsmouth Points: 6	Post Options Post Reply Quote Brian.Dukes Report Post Thanks(0) Quote Reply Topic: WhosON with SRI Posted: 03 May 2019 at 8:39am
	At a recent Penetration Test scan, it was reported that 'external script not using integrity' Description: The remote host may be vulnerable to payment entry data exfiltration due to javascript included from potentially untrusted and unverified third parties script src. If the host is controlled by a 3rd party, ensure that the 3rd party is PCI DSS compliant. https://{whosonserver}/include.js?domain=https://yourhost.com Looking at using SRI (Subresource Integrity) https://www.srihash.org/ however, trying to generate a hash, I get the following issue: "Error: this resource is not eligible for integrity checks. See https://enable-cors.org/server.html" How is it therefore possible to resolve this penetration test issue? are we able to apply SRI at all?

Liam Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 29 Jun 2011 Location: Stoke-on-Trent Points: 263	Post Options Post Reply Quote Liam Report Post Thanks(0) Quote Reply Posted: 03 May 2019 at 9:14am
	Hi Brian I think the reason why SRI hash isn't working is because the include file is dynamically generated on request. What you could do is browse to https://{whosonserver}/include.js?domain=https://yourhost.com Then save the content to a JS file of your own and host that on your own web server or CDN (and reference that in the WhosOn tracking code instead), then you should be able to validate the integrity of your hard copy. This will work although you will need to be sure to update the hard copy version of the file every time you update the WhosOn server application. In addition, be sure to do this for each of the sites that you have configured within WhosOn, as each one will generate its own version of the include.js I hope that this helps.

Brian.Dukes Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 03 May 2019 Location: Portsmouth Points: 6	Post Options Post Reply Quote Brian.Dukes Report Post Thanks(0) Quote Reply Posted: 07 May 2019 at 8:06am
	Thank you Liam

Brian.Dukes Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 03 May 2019 Location: Portsmouth Points: 6	Post Options Post Reply Quote Brian.Dukes Report Post Thanks(0) Quote Reply Posted: 07 May 2019 at 8:20am
	Actually @Liam - I wasn't involved in the original implimentation of WhosOn, so possibly some newbie question here -- you say 'and reference that in the WhosOn tracking code instead' - this is the only bit of code I can see on our site: <div id="chat-link-container"> <!-- Embedded WhosOn: Insert the script below at the point on your page where you want the Click To Chat link to appear --> <script type='text/javascript' src='https://{whosonserver}/include.js?domain=yourhost.com'></script> <script type='text/javascript'> if (typeof sWOTrackPage == 'function') sWOTrackPage(); </script> <!-- End of embedded WhosOn --> </div> Where is the tracking code that you refer to?

benjamin wilshaw Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Technical Support Joined: 29 Jun 2017 Location: Stoke-on-Trent Points: 38	Post Options Post Reply Quote benjamin wilshaw Report Post Thanks(1) Quote Reply Posted: 08 May 2019 at 3:20am
	Hi Brian, Yes this would be the tracking code my colleague Liam referred to. So if you open the url: https://{whosonserver}/include.js?domain=yourhost.com in a web browser this will generate the dynamically generated Include.js he mentioned so that you could host it on another web server or CDN by simply changing the url in the tracking to point to the new include.js location. Kind Regards, Ben
	Technical Support