Advice Request Firefox + Kaspersky error: "SEC_ERROR_UNKNOWN_ISSUER"

[SpectacularTheDude]

Maybe I didn't understand what this section is about so if anyone feels I'm out of place here please let me know.

I use Kaspersky Internet Security 2017 and Firefox V51 (32 bit version but 64 bit Windows 7 OS...does this matter?) and after a clean install I get the error: "SEC_ERROR_UNKNOWN_ISSUER" or "Your connection is not secure". I know I need to go to Kaspersky settings --> Additional --> Network --> Encrypted Connections Scanning --> Do Not Scan Encrypted Connections. This will make it all work, but it makes me vulnerable.

Now I was reading the MalwareTips Kaspersky setup guide and it says to keep it in the "Scan Encrypted Connections upon request from protection components" option and then install certificates, but this didn't work for me. I had Firefox shut down as recommended.

I also have Kaspersky add on on Firefox, don't know if that has any influence.

Can anyone help me with this issue?

Thanks!

 

[harlan4096]

Are You getting that error with any visited site in FireFox?

Check Your date/time of Your Windows and BIOS...

 

[XhenEd]

Don't worry if you have to disable Scan Encrypted Connections. It won't make you vulnerable. You still have other components, if it's disabled.

But, yeah, your problem should be solved, regardless whether you want the option enabled or not.

 

[SpectacularTheDude]

OK thanks I'll have a look in the BIOS.

EDIT: Yup all OK in the BIOS.

 

[SpectacularTheDude]

Are You getting that error with any visited site in FireFox?

Check Your date/time of Your Windows and BIOS...

Yes it happens for every webpage.

 

[harlan4096]

Anyway that's so strange, FireFox is my main browsers and use it even with "always scan encrypted connections", and not getting that issue...

Check You don't have more than 1 "Kaspersky root certificate" in FireFox -> Certificates -> Authorities.

 

[SpectacularTheDude]

Anyway that's so strange, FireFox is my main browsers and use it even with "always scan encrypted connections", and not getting that issue...

Check You don't have more than 1 "Kaspersky root certificate" in FireFox -> Certificates -> Authorities.

You mean by going to Firefox options-->Avanced-->Certificates-->View Certificates? Couldn't find anything related to Kaspersky in that long list...

 

[harlan4096]

Yes, in tab "Authorities" You should have there 1 "Kaspersky Root Certificate", if You don't have it, then import it manually from:

C:\ProgramData\Kaspersky Lab\AVP17.0.0\Data\Cert\(fake)Kaspersky Anti-Virus Personal Root Certificate.cer

 

[SpectacularTheDude]

Yes, in tab "Authorities" You should have there 1 "Kaspersky Root Certificate", if You don't have it, then import it manually from:

Did you copy that from your own computer? Because my folders are mostly named in a different way and I'm having trouble finding it but I'll keep trying.

EDIT: never mind I forgot to enable viewing hidden files...D'UUHHHH

After that just check first check box?

 

[harlan4096]

You can check the 3 ones... You can edit the certificate check.

Fixed the issue?

 

[SpectacularTheDude]

You can check the 3 ones...

What's the point of the other 2?

 

[harlan4096]

I'm not sure, but I add this certificate manually also to my ThenderBird (the same method than FireFox) client and tick the 3 ones...

 

[SpectacularTheDude]

I'm not sure, but I add this certificate manually also to my ThenderBird (the same method than FireFox) client and tick the 3 ones...

Worked perfectly, Thanks!