Author Topic: Avast Blocking Access to Internet After Update 18.6.2349  (Read 17419 times)

0 Members and 1 Guest are viewing this topic.

Offline citizenkenneth

  • Newbie
  • *
  • Posts: 8
Avast Blocking Access to Internet After Update 18.6.2349
« on: August 21, 2018, 10:50:20 PM »
I just updated Avast to version 18.6.2349 and now I can't open websites in Firefox and Edge. I can successfully ping sites via Windows command prompt but not via my Internet browser. Current solution to my problem is to disable Avast shield control and everything works again. I'm running Windows 10 with all the latest updates.

Any suggesting?

Offline citizenkenneth

  • Newbie
  • *
  • Posts: 8
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #1 on: August 21, 2018, 11:00:52 PM »
Okay, by messing with the settings I have isolated the problem to the Web Shield component. When I deactivate the Web Shield component everything works again.
« Last Edit: August 21, 2018, 11:05:27 PM by citizenkenneth »

Offline Dragon Knight

  • Newbie
  • *
  • Posts: 18
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #2 on: August 21, 2018, 11:21:43 PM »
Is anyone having a similar issue with Google Chrome?

Offline DavidR

  • Avast √úberevangelist
  • Certainly Bot
  • *****
  • Posts: 83519
  • No support PMs thanks
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #3 on: August 22, 2018, 12:36:47 AM »
Okay, by messing with the settings I have isolated the problem to the Web Shield component. When I deactivate the Web Shield component everything works again.

Disabling a scan isn't actually going to solve the issue, this could well be your firewall blocking the Web Shield accessing the web.

What is your firewall ?
WinXP ProSP3/ Core2Duo E8300/ 4GB Ram/ avast! free 18.5.2342/ Firefox ESR, uBlock Origin, uMatrix/ MailWasher Pro7.11.0/ DropMyRights/ WinPatrol+/ Drive Image 7.1/ SnagIt 10.0/ avast! mobile security
Windows 10 Home 1909 64bit/ Acer Aspire F15/ Intel Core i5 7200U 2.5GHz, 8GB DDR4 memory, 256GB SSD, 1TB HDD/ avast! free 20.6.2420 (build 20.6.5495.561) UI-1.0.541/ WinPatrol+/ Firefox, uBlock Origin, uMatrix/ MailWasher Pro

Offline citizenkenneth

  • Newbie
  • *
  • Posts: 8
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #4 on: August 22, 2018, 01:35:52 AM »
Okay, by messing with the settings I have isolated the problem to the Web Shield component. When I deactivate the Web Shield component everything works again.

Disabling a scan isn't actually going to solve the issue, this could well be your firewall blocking the Web Shield accessing the web.

What is your firewall ?

I never said it was a final solution. But it was more more preferable to just disable the Web Shield component versus disabling Avast entirely, as a temporary solution. And the problem started right after I had restarted my PC after applying the new update.

As for a firewall, I use the inbuilt in Windows 10.

Offline citizenkenneth

  • Newbie
  • *
  • Posts: 8
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #5 on: August 22, 2018, 01:47:35 AM »
Programs affected by the Web Shield:

OneDrive
Dropbox
Steam
Thunderbird
TeamViewer
qBittorent

Not affected:

Avast
PowerShell
Command Prompt

Offline wilsonmatematico

  • Newbie
  • *
  • Posts: 1
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #6 on: August 22, 2018, 02:15:29 AM »
I have the same problem in my internet. After update 18.6.2349 avast blocking access to DNS.
What's wrong with the avast update?
I use firewall native from Windows 7, but the firewall doesn't the problem.
I disable the web shield for use internet, because web shield is blocking access to DNS

Offline news_reports

  • Newbie
  • *
  • Posts: 2
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #7 on: August 22, 2018, 03:07:42 AM »
Same problem.  I have Windows 7.  After updating to 18.6.2349, I am having difficulties accessing Chrome, Avast site, Network & Sharing Center etc.  I can only turn computer off manually (force shut-down) and even that takes time.  When I log in again, it seems o.k., but this sequence of events has happened twice so far today.  I am not computer-savvy.  What to do?

Offline Filip Braun

  • Avast team
  • Jr. Member
  • *
  • Posts: 98
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #8 on: August 22, 2018, 11:00:56 AM »
Hello,

Thank you all for the reports.
We are looking into the issue.

If possible, could you please provide more details like:
- Your Avast edition (Free, Internet Security, ...)
- The exact error message from the browser (ideally with info about browser version)
- Does the issue appear immediately after enabling Web Shield or is it working for some time and then breaks?
- Does ping of domain work or just ping of IP address?
- Generate support package when the issue appears and send us the ID: https://support.avast.com/en-ww/article/Submit-support-file
- Generate a Wireshark PCAP (https://www.wireshark.org/) with the issue (record and try to browse + specify which URL you tried to visit during the capture) and send us a download link or upload it to our FTP: https://support.avast.com/en-eu/article/FTP-file-upload
- Create a dump file of AvastSvc.exe and send us a download link or upload it to our FTP: https://support.avast.com/en-eu/article/FTP-file-upload

Thank you,
Filip
« Last Edit: August 22, 2018, 11:53:26 AM by Filip Braun »

Offline citizenkenneth

  • Newbie
  • *
  • Posts: 8
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #9 on: August 22, 2018, 12:57:54 PM »
Hello,

Thank you all for the reports.
We are looking into the issue.

If possible, could you please provide more details like:
- Your Avast edition (Free, Internet Security, ...)
- The exact error message from the browser (ideally with info about browser version)
- Does the issue appear immediately after enabling Web Shield or is it working for some time and then breaks?
- Does ping of domain work or just ping of IP address?
- Generate support package when the issue appears and send us the ID: https://support.avast.com/en-ww/article/Submit-support-file
- Generate a Wireshark PCAP (https://www.wireshark.org/) with the issue (record and try to browse + specify which URL you tried to visit during the capture) and send us a download link or upload it to our FTP: https://support.avast.com/en-eu/article/FTP-file-upload
- Create a dump file of AvastSvc.exe and send us a download link or upload it to our FTP: https://support.avast.com/en-eu/article/FTP-file-upload

Thank you,
Filip

- Avast Free Antivirus version 18.6.2349
- Firefox Quantum 61.0.2 (64 bit) & Microsoft Edge 42.17134.1.0. No error messages just a blank constant never ending loading.... site.
- The issue appear instantaneously after the Web Shield component is activated.
- Does ping of domain work or just ping of IP address?
Quote
Ping test with Avast Free Antivirus - Web Shield Turned Off

C:\Users\CK>ping avast.com

Pinging avast.com [77.234.41.52] with 32 bytes of data:
Reply from 77.234.41.52: bytes=32 time=259ms TTL=53
Reply from 77.234.41.52: bytes=32 time=465ms TTL=53
Reply from 77.234.41.52: bytes=32 time=222ms TTL=53
Reply from 77.234.41.52: bytes=32 time=258ms TTL=53

Ping statistics for 77.234.41.52:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 222ms, Maximum = 465ms, Average = 301ms

C:\Users\CK>ping 77.234.42.85

Pinging 77.234.42.85 with 32 bytes of data:
Reply from 77.234.42.85: bytes=32 time=174ms TTL=48
Reply from 77.234.42.85: bytes=32 time=151ms TTL=48
Reply from 77.234.42.85: bytes=32 time=156ms TTL=48
Reply from 77.234.42.85: bytes=32 time=516ms TTL=48

Ping statistics for 77.234.42.85:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 151ms, Maximum = 516ms, Average = 249ms

   
Ping test with Avast Free Antivirus - Web Shield Turned On
   
C:\Users\CK>ping avast.com

Pinging avast.com [77.234.41.52] with 32 bytes of data:
Reply from 77.234.41.52: bytes=32 time=289ms TTL=53
Reply from 77.234.41.52: bytes=32 time=232ms TTL=53
Reply from 77.234.41.52: bytes=32 time=428ms TTL=53
Reply from 77.234.41.52: bytes=32 time=362ms TTL=53

Ping statistics for 77.234.41.52:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 232ms, Maximum = 428ms, Average = 327ms

C:\Users\CK>ping 77.234.42.85

Pinging 77.234.42.85 with 32 bytes of data:
Reply from 77.234.42.85: bytes=32 time=207ms TTL=48
Reply from 77.234.42.85: bytes=32 time=412ms TTL=48
Reply from 77.234.42.85: bytes=32 time=157ms TTL=48
Reply from 77.234.42.85: bytes=32 time=168ms TTL=48

Ping statistics for 77.234.42.85:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 157ms, Maximum = 412ms, Average = 236ms

C:\Users\CK>
-Avast Support Tool File ID V4RYM
-Wireshark PCAP Capture was uploaded to the Avast FTP server. Sites I tried: avast.com, microsoft.com and opening of Steam app.
  Filename: File ID V4RYM.rar
  RAR package Password: virus
- For some reason I can't make a dump file of AvastSvc.exe. When I try I get a Access Denied. It is the same with ProcDump and ProcessHacker. All instances was run as admin.
« Last Edit: August 22, 2018, 01:19:46 PM by citizenkenneth »

Offline Filip Braun

  • Avast team
  • Jr. Member
  • *
  • Posts: 98
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #10 on: August 22, 2018, 01:43:59 PM »
Awesome, thank you very much!
We're looking at it right now.

Quote
- For some reason I can't make a dump file of AvastSvc.exe. When I try I get a Access Denied. It is the same with ProcDump and ProcessHacker. All instances was run as admin.
Before dumping try turning OFF Avast self-defense (Settings > Troubleshooting) and File Shield.
You can also try dumping it just from Windows Task Manager.

Filip

Offline citizenkenneth

  • Newbie
  • *
  • Posts: 8
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #11 on: August 22, 2018, 02:02:49 PM »
Awesome, thank you very much!
We're looking at it right now.

Quote
- For some reason I can't make a dump file of AvastSvc.exe. When I try I get a Access Denied. It is the same with ProcDump and ProcessHacker. All instances was run as admin.
Before dumping try turning OFF Avast self-defense (Settings > Troubleshooting) and File Shield.
You can also try dumping it just from Windows Task Manager.

Filip

That did it. I have uploaded it to the Avast FTP server.
Filename: File ID V4RYM - AvastSvc.exe Dump File.rar
RAR Package password: virus

Offline Filip Braun

  • Avast team
  • Jr. Member
  • *
  • Posts: 98
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #12 on: August 22, 2018, 04:42:24 PM »
We have an idea of what is wrong.
To confirm it, could you please check and post file version of these files:
- "C:\Program Files\AVAST Software\Avast\aswStreamFilter.dll" (or in your Avast install folder)
- "C:\Windows\System32\drivers\aswStm.sys"

Thank you,
Filip

Offline cloud3

  • Newbie
  • *
  • Posts: 1
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #13 on: August 22, 2018, 05:42:32 PM »
so, no one from server side really tested this before putting it in update?
makes you wonder if we are facing another "ccleaner" kind of problem. yeah, i am probably exaggerating, but hey i am a scaredy cat.

Offline mchain

  • Avast Evangelist
  • Ultra Poster
  • ***
  • Posts: 5416
  • Spartan Warrior
Re: Avast Blocking Access to Internet After Update 18.6.2349
« Reply #14 on: August 22, 2018, 10:18:03 PM »
so, no one from server side really tested this before putting it in update?
makes you wonder if we are facing another "ccleaner" kind of problem. yeah, i am probably exaggerating, but hey i am a scaredy cat.
Updating through the gui (updating over the top of old installation) could fail to update some older files.  Also, using web installer can cause issues such as this due to iffy connections.
Windows 10 Home 64-bit 1909 Avast Premier Security version 20.1.2397 (build 20.1.5069.559) UI version 1.0.460.