Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Error code: SEC_ERROR_UNKNOWN_ISSUER

  • 3 replies
  • 2 have this problem
  • 9 views
  • Last reply by cor-el

Kazing
Kazing
more options

Within the last two weeks I've been sporadically getting this error on Firefox. Rebooting fixes the issue but it persists despite a clean reinstall. Is this an issue with Avast or is it a symptom of something more insidious?

support.mozilla.org uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER

https://support.mozilla.org/1/firefox/59.0.3/WINNT/en-US/security-error

Peer’s Certificate issuer is not recognized.

HTTP Strict Transport Security: false HTTP Public Key Pinning: false

Certificate chain:

BEGIN CERTIFICATE-----

MIIETDCCAzSgAwIBAgIQIw6WMQJYiEqJn3MBgPm9wTANBgkqhkiG9w0BAQsFADCB hDE7MDkGA1UECwwyZ2VuZXJhdGVkIGJ5IGF2YXN0ISBhbnRpdmlydXMgZm9yIFNT TC9UTFMgc2Nhbm5pbmcxHzAdBgNVBAoMFmF2YXN0ISBXZWIvTWFpbCBTaGllbGQx JDAiBgNVBAMMG2F2YXN0ISBXZWIvTWFpbCBTaGllbGQgUm9vdDAeFw0xNzA5MjAw MDAwMDBaFw0xODEwMzExMjAwMDBaMIGGMQswCQYDVQQGEwJVUzETMBEGA1UECBMK Q2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4gVmlldzEbMBkGA1UEChMSTW96 aWxsYSBGb3VuZGF0aW9uMQ8wDQYDVQQLEwZXZWJPcHMxHDAaBgNVBAMTE3N1cHBv cnQubW96aWxsYS5vcmcwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDy wpcrpmXW7MuNMMrnRUXejKgYK9bP0O9+gwCMOb+6ukP441nqxez1Ift0t+AiV5HR HMF3yw/Nrww1tdclSHc9fzScO6DsFJFUmOLv5woTIKxvwPGyTMlTWaxT5l9WbrQj YSaO2E/iQobEmjwiVqyDSYjY9hUbfFLSdfFlwz1MCa5EAIsMz3rwjF1YwZEgdhVF GaCXeYSvDbllzfT0NOJnTscaC76gm4Yvm4fzfx5kK12jqXrT5qnauiw2v0VhGpRV cDKGORswQGsuhWYYPs0lK+Q+ekujpnJ+ZJLEMLx4L663iiOFb25lixCnRyeHeZ3j uGLYCJfcTVZw+CxWZ6CZAgMBAAGjgbUwgbIwHwYDVR0jBBgwFoAUxBB6f4TOjEQP ik6mpAuoQqgBXDYwHQYDVR0OBBYEFKNcAPirCasC5wR4TwpVz9cQH1ReMDMGA1Ud EQQsMCqCE3N1cHBvcnQubW96aWxsYS5vcmeCE3N1cHBvcnQubW96aWxsYS5jb20w DgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAM BgNVHRMBAf8EAjAAMA0GCSqGSIb3DQEBCwUAA4IBAQC+GWxGgxZk2YBM/WsXyKge WRtvt0df8iRaNemrubG78sw0soXI3XTw1y2O/VVXKP9UvDtHB5YwPE/OOj0JKGxZ QGAATFEYR+BB3QuE0TKfRuQC4RiKXtS7U40ozXOAq0yUMrwK6OZUQ3VF2qiI9TC6 e5vcHMOF6XMGZM3KNBsC0RVbYW9VVZ9suZYhFG4NG1/CbLqcxT/rwFnZgBUE4oTI 5p1shxEfOcrR39pmvEiRgbAszy5ltDTAyIXMl0+ERKWBOJ6jyoHim6xhI8z6x8kk /jcxtIr+aiw5kExBv3Ix7+AyTLAkCdzW/yCHXhU448LY0nl3ADOtv9oa8IQmTMi0

END CERTIFICATE-----
BEGIN CERTIFICATE-----

MIIECTCCAvGgAwIBAgIQZEoRDE088E+EIluoaoDA7zANBgkqhkiG9w0BAQUFADCB hDE7MDkGA1UECwwyZ2VuZXJhdGVkIGJ5IGF2YXN0ISBhbnRpdmlydXMgZm9yIFNT TC9UTFMgc2Nhbm5pbmcxHzAdBgNVBAoMFmF2YXN0ISBXZWIvTWFpbCBTaGllbGQx JDAiBgNVBAMMG2F2YXN0ISBXZWIvTWFpbCBTaGllbGQgUm9vdDAeFw0xNDEyMDUx NDQxMDFaFw0yNDEyMDIxNDQxMDFaMIGEMTswOQYDVQQLDDJnZW5lcmF0ZWQgYnkg YXZhc3QhIGFudGl2aXJ1cyBmb3IgU1NML1RMUyBzY2FubmluZzEfMB0GA1UECgwW YXZhc3QhIFdlYi9NYWlsIFNoaWVsZDEkMCIGA1UEAwwbYXZhc3QhIFdlYi9NYWls IFNoaWVsZCBSb290MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv9J6 3IA5kgReriKn63XVFrpL8MUVpFE8xByFhvbCrILurj7vFwXj4mupXTnW5cUTm1Ig nQgdDEf4LBGRf2kb9tpHu/FDyAid8My7ux8TS1ms4dGNgxBcLGb4xatelJaqSvZ6 ThtpqzmQ7pua+k/7awJJmqVuQxg1ZIhZ/q6W5S9T/PbUZQaEhPNeTdxZ6k7o0psv N909OpSiRhtrEoGY65BvXQSRerZCQ+WT9CT0HYlDvEnZuaQ+AYEg4RoX6r5vDggp Nx+Gr85N8Z7qEN0JkVHxxe9yoPG5MbuRXQv1FytnLp4HIYqD7mADsGZheqQFf34o q2N6izSf9bYSuQzZhQIDAQABo3UwczAPBgNVHRMECDAGAQH/AgEAMAsGA1UdDwQE AwICBDATBgNVHSUEDDAKBggrBgEFBQcDATAdBgNVHQ4EFgQUxBB6f4TOjEQPik6m pAuoQqgBXDYwHwYDVR0jBBgwFoAUxBB6f4TOjEQPik6mpAuoQqgBXDYwDQYJKoZI hvcNAQEFBQADggEBAFyCn8qahhG2cTaxvOv/eiwlmc28KMuS27t8Cqctpiy1CGJg 9NiFfxUNh01hZX1W6MPsk7s+uQ71IFbmc9c6Y+rYSodIiDUxHCd7nyR54v1b3LlR AynMND8MTRIEzMJ+UMfC/Z5BDLBwvumN9JU/zvSQWqL2t835oko7GoDHsorZTBMV Y1wveedewkoOoOHS4zpEFbByT4+CD6n1CR6KPhikjaED99EzVI2fSD8lDW1M71bx iDZEa6mQs+mfOP27I8U+xjskQvW7QxfAZ3j74CiG+0I5AwPkLoIfvyjbNcnymZzw DBldrLeqoM+TsRgukuxmY2BpOzz4EruaLHDUaPI=

END CERTIFICATE-----
Within the last two weeks I've been sporadically getting this error on Firefox. Rebooting fixes the issue but it persists despite a clean reinstall. Is this an issue with Avast or is it a symptom of something more insidious? support.mozilla.org uses an invalid security certificate. The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported. Error code: SEC_ERROR_UNKNOWN_ISSUER https://support.mozilla.org/1/firefox/59.0.3/WINNT/en-US/security-error Peer’s Certificate issuer is not recognized. HTTP Strict Transport Security: false HTTP Public Key Pinning: false Certificate chain: -----BEGIN CERTIFICATE----- MIIETDCCAzSgAwIBAgIQIw6WMQJYiEqJn3MBgPm9wTANBgkqhkiG9w0BAQsFADCB hDE7MDkGA1UECwwyZ2VuZXJhdGVkIGJ5IGF2YXN0ISBhbnRpdmlydXMgZm9yIFNT TC9UTFMgc2Nhbm5pbmcxHzAdBgNVBAoMFmF2YXN0ISBXZWIvTWFpbCBTaGllbGQx JDAiBgNVBAMMG2F2YXN0ISBXZWIvTWFpbCBTaGllbGQgUm9vdDAeFw0xNzA5MjAw MDAwMDBaFw0xODEwMzExMjAwMDBaMIGGMQswCQYDVQQGEwJVUzETMBEGA1UECBMK Q2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4gVmlldzEbMBkGA1UEChMSTW96 aWxsYSBGb3VuZGF0aW9uMQ8wDQYDVQQLEwZXZWJPcHMxHDAaBgNVBAMTE3N1cHBv cnQubW96aWxsYS5vcmcwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDy wpcrpmXW7MuNMMrnRUXejKgYK9bP0O9+gwCMOb+6ukP441nqxez1Ift0t+AiV5HR HMF3yw/Nrww1tdclSHc9fzScO6DsFJFUmOLv5woTIKxvwPGyTMlTWaxT5l9WbrQj YSaO2E/iQobEmjwiVqyDSYjY9hUbfFLSdfFlwz1MCa5EAIsMz3rwjF1YwZEgdhVF GaCXeYSvDbllzfT0NOJnTscaC76gm4Yvm4fzfx5kK12jqXrT5qnauiw2v0VhGpRV cDKGORswQGsuhWYYPs0lK+Q+ekujpnJ+ZJLEMLx4L663iiOFb25lixCnRyeHeZ3j uGLYCJfcTVZw+CxWZ6CZAgMBAAGjgbUwgbIwHwYDVR0jBBgwFoAUxBB6f4TOjEQP ik6mpAuoQqgBXDYwHQYDVR0OBBYEFKNcAPirCasC5wR4TwpVz9cQH1ReMDMGA1Ud EQQsMCqCE3N1cHBvcnQubW96aWxsYS5vcmeCE3N1cHBvcnQubW96aWxsYS5jb20w DgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAM BgNVHRMBAf8EAjAAMA0GCSqGSIb3DQEBCwUAA4IBAQC+GWxGgxZk2YBM/WsXyKge WRtvt0df8iRaNemrubG78sw0soXI3XTw1y2O/VVXKP9UvDtHB5YwPE/OOj0JKGxZ QGAATFEYR+BB3QuE0TKfRuQC4RiKXtS7U40ozXOAq0yUMrwK6OZUQ3VF2qiI9TC6 e5vcHMOF6XMGZM3KNBsC0RVbYW9VVZ9suZYhFG4NG1/CbLqcxT/rwFnZgBUE4oTI 5p1shxEfOcrR39pmvEiRgbAszy5ltDTAyIXMl0+ERKWBOJ6jyoHim6xhI8z6x8kk /jcxtIr+aiw5kExBv3Ix7+AyTLAkCdzW/yCHXhU448LY0nl3ADOtv9oa8IQmTMi0 -----END CERTIFICATE----- -----BEGIN CERTIFICATE----- MIIECTCCAvGgAwIBAgIQZEoRDE088E+EIluoaoDA7zANBgkqhkiG9w0BAQUFADCB hDE7MDkGA1UECwwyZ2VuZXJhdGVkIGJ5IGF2YXN0ISBhbnRpdmlydXMgZm9yIFNT TC9UTFMgc2Nhbm5pbmcxHzAdBgNVBAoMFmF2YXN0ISBXZWIvTWFpbCBTaGllbGQx JDAiBgNVBAMMG2F2YXN0ISBXZWIvTWFpbCBTaGllbGQgUm9vdDAeFw0xNDEyMDUx NDQxMDFaFw0yNDEyMDIxNDQxMDFaMIGEMTswOQYDVQQLDDJnZW5lcmF0ZWQgYnkg YXZhc3QhIGFudGl2aXJ1cyBmb3IgU1NML1RMUyBzY2FubmluZzEfMB0GA1UECgwW YXZhc3QhIFdlYi9NYWlsIFNoaWVsZDEkMCIGA1UEAwwbYXZhc3QhIFdlYi9NYWls IFNoaWVsZCBSb290MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv9J6 3IA5kgReriKn63XVFrpL8MUVpFE8xByFhvbCrILurj7vFwXj4mupXTnW5cUTm1Ig nQgdDEf4LBGRf2kb9tpHu/FDyAid8My7ux8TS1ms4dGNgxBcLGb4xatelJaqSvZ6 ThtpqzmQ7pua+k/7awJJmqVuQxg1ZIhZ/q6W5S9T/PbUZQaEhPNeTdxZ6k7o0psv N909OpSiRhtrEoGY65BvXQSRerZCQ+WT9CT0HYlDvEnZuaQ+AYEg4RoX6r5vDggp Nx+Gr85N8Z7qEN0JkVHxxe9yoPG5MbuRXQv1FytnLp4HIYqD7mADsGZheqQFf34o q2N6izSf9bYSuQzZhQIDAQABo3UwczAPBgNVHRMECDAGAQH/AgEAMAsGA1UdDwQE AwICBDATBgNVHSUEDDAKBggrBgEFBQcDATAdBgNVHQ4EFgQUxBB6f4TOjEQPik6m pAuoQqgBXDYwHwYDVR0jBBgwFoAUxBB6f4TOjEQPik6mpAuoQqgBXDYwDQYJKoZI hvcNAQEFBQADggEBAFyCn8qahhG2cTaxvOv/eiwlmc28KMuS27t8Cqctpiy1CGJg 9NiFfxUNh01hZX1W6MPsk7s+uQ71IFbmc9c6Y+rYSodIiDUxHCd7nyR54v1b3LlR AynMND8MTRIEzMJ+UMfC/Z5BDLBwvumN9JU/zvSQWqL2t835oko7GoDHsorZTBMV Y1wveedewkoOoOHS4zpEFbByT4+CD6n1CR6KPhikjaED99EzVI2fSD8lDW1M71bx iDZEa6mQs+mfOP27I8U+xjskQvW7QxfAZ3j74CiG+0I5AwPkLoIfvyjbNcnymZzw DBldrLeqoM+TsRgukuxmY2BpOzz4EruaLHDUaPI= -----END CERTIFICATE-----

Chosen solution

Hi Kazing

The issuer of the certificate is your Avast security software. 

Subject 	C=US, ST=California, L=Mountain View, O=Mozilla Foundation, OU=WebOps, CN=support.mozilla.org
Issuer 	OU=generated by avast! antivirus for SSL/TLS scanning, O=avast! Web/Mail Shield, CN=avast! Web/Mail Shield Root

See this article about how to proceed with Avast.

Read this answer in context 👍 1

All Replies (3)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

Hi Kazing

The issuer of the certificate is your Avast security software. 

Subject 	C=US, ST=California, L=Mountain View, O=Mozilla Foundation, OU=WebOps, CN=support.mozilla.org
Issuer 	OU=generated by avast! antivirus for SSL/TLS scanning, O=avast! Web/Mail Shield, CN=avast! Web/Mail Shield Root

See this article about how to proceed with Avast.

Kazing
Kazing Question owner
more options

Thanks for the prompt response,looks like I was worried over nothing.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You're welcome.