ERR_TOO_MANY_REDIRECTS on some websites with KES 12.11.0

[Gone Phishing]

Hi all,

Following KES 12.11.0 deployment, our users are getting an ERR_TOO_MANY_REDIRECTS errors when trying to access specific web sites. I have confirmed that it is browser independent and definitely related to the Web Threat Protection component. Adding site exceptions and/or changing other various parameters in the Web Threat Protection settings don not make a difference - the only thing that works is disabling Web Threat Protection completely.

Has anyone else experienced this and do you have any insights / suggested fixes?

Thanks,
Doug

[Tahmeed702]

16 hours ago, Gone Phishing said:

Hi all,

Following KES 12.11.0 deployment, our users are getting an ERR_TOO_MANY_REDIRECTS errors when trying to access specific web sites. I have confirmed that it is browser independent and definitely related to the Web Threat Protection component. Adding site exceptions and/or changing other various parameters in the Web Threat Protection settings don not make a difference - the only thing that works is disabling Web Threat Protection completely.

Has anyone else experienced this and do you have any insights / suggested fixes?

Thanks,
Doug

Can you please share some screenshot of the errors or warning. 

[Gone Phishing]

The issue is intermittent (as in it happens maybe 50% of the time) and occurs when we attempt to access any of the four URLs below:

https://workforcenow.adp.com
https://login.payworks.ca/login
https://collaboration.geowarehouse.ca/ui/login-with-okta
https://secure.paymentech.com/portal/por_new.aspx

It happens in three different browsers (Firefox, Edge and Chrome), all with cookies and history freshly cleared. Attached are a couple of screenshots from different browsers on different sites when the error does come up. It only happens with KES 12.11 (12.11.0.637) - KES 12.10 (12.10.0.466) works fine (I manually uninstalled KES 12.11 on a few PCs and they again work just fine again with KES 12.10). It happens on three different versions of Windows (Win 11 Pro 25H2, Win 11 Pro 23H2, Win 10 Pro 22H2), all fully patched.

I am unfortunately unable to downgrade the KES client through the administration server, and manually uninstalling KES 12.11 on 100+ systems is not exactly an option.

Thanks & best regards,

Doug