Protocol filtering breaks websockets after update at 5/05/2016

[SagePtr 1]

After update at 5/05/2016 many users of my webchat met problem: websockets ceased to work.

 

How to reproduce this bug:

1. Turn Protocol filtering off (at Web and Email section of advanced config)

2. Open hxxp://websocketstest.com/and ensure everything works ok

3. Turn Protocol filtering on again

4. Refresh hxxp://websocketstest.com/and all websocket connections (except SSL) will fail.

 

If I add remote server's IP-address or application to protocol filtering exceptions or turn protocol filtering off - websockets will work again.

 

Please fix this bug because it's weird. In versions before 5/05/2016 everithing worked OK. Thanks.

[Marcos 2,866]

There's no content on that website and the domain seems to be for sale.

[SagePtr 1]

You can try other sites for websockets test, for example, this: hxxp://www.websocket.org/echo.html

[UltimateRuffles 1]

Same problem here.

[Proctorio 0]

We have found this to be an issue as well on multiple Windows 10 machines. Sample result from websocketstest: hxxp://websocketstest.com/result/756727

[Marcos 2,866]

I was able to reproduce it and will report it to our engineers along with the appropriate debug logs.

[SagePtr 1]

We have found this to be an issue as well on multiple Windows 10 machines. Sample result from websocketstest: hxxp://websocketstest.com/result/756727

 

Windows 7 is affected too. Tried on clean VirtualBox machine (Windows 7 + Google Chrome + windows updates + trial ESET Smart Security).

[Proctorio 0]

 

We have found this to be an issue as well on multiple Windows 10 machines. Sample result from websocketstest: hxxp://websocketstest.com/result/756727

 

Windows 7 is affected too. Tried on clean VirtualBox machine (Windows 7 + Google Chrome + windows updates + trial ESET Smart Security).

 

 

We just found the issue on Windows 8.1 as well

[Marcos 2,866]

The issue will be fixed in the Internet protection module 1252 soon. I'd strongly suggest using pre-release update servers on non-critical computers so that if a module update breaks something, you can report it to us and switch to regular updates until a fix is available.

[Webia 0]

Websockets are also broken when using NOD32 Antivirus v9 (9.0.375.1).

When disabling protocol filtering (in advanced section - web and email, as suggested above) all seems to work fine.

 

Antivirus v8 (at least 8.0.319.1) does not seem to be affected by this.

[successfulgeek 0]

I am having the same issue on Windows 10 Nod32 version 9.0.375.0

[Marcos 2,866]

I am having the same issue on Windows 10 Nod32 version 9.0.375.0

 

Please post the information about installed modules as this should not be a problem any more.

[successfulgeek 0]

@Marcos I actually posted more info over at https://forum.eset.com/topic/8370-updating-virus-signature-database-wont-let-volafileio-load/So I am hopeful full fix is coming soon.