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Knowledge Base

Connecting to VMware Horizon View desktops with a Horizon Client fails with the error: "An SSL error Occurred" (78372)

Last Updated: 1/13/2023Categories: How toTotal Views: 45979Language:
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Symptoms

You receive the SSL error "An SSL error Occurred" when connecting to the Horizon connection server URL with a client.

Observed in all Horizon clients, thin clients, and HTML Access.

Horizon Client Log Lines show similarity to the below and may reveal additional specifics on cause : Location of Horizon (VDM) log files (1027744)

2021-11-22T09:01:51.327-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: ALPN, offering http/1.1
2021-11-22T09:01:51.327-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
2021-11-22T09:01:51.327-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: TLSv1.2 (OUT), TLS header, Certificate Status (22):
2021-11-22T09:01:51.327-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_OUT) on request 0B9C98A8: 5 bytes of data.
2023-11-22T09:01:51.327-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: TLSv1.2 (OUT), TLS handshake, Client hello (1):
2023-11-22T09:01:51.328-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_OUT) on request 0B9C98A8: 237 bytes of data.
2023-11-22T09:01:51.393-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_IN) on request 0B9C98A8: 5 bytes of data.
2023-11-22T09:01:51.393-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: TLSv1.2 (IN), TLS handshake, Server hello (2):
2023-11-22T09:01:51.393-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_IN) on request 0B9C98A8: 42 bytes of data.
2023-11-22T09:01:51.393-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_IN) on request 0B9C98A8: 5 bytes of data.
2023-11-22T09:01:51.393-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: TLSv1.2 (IN), TLS handshake, Certificate (11):
2023-11-22T09:01:51.393-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_IN) on request 0B9C98A8: 3858 bytes of data.
2023-11-22T09:01:51.394-05:00 INFO (01) [libcdk] : Verify server's certificate for Request 0B9C98A8
2023-11-22T09:01:51.394-05:00 INFO (01) [libcdk] : Find rpc request 0B9C98A8 from list
2023-11-22T09:01:51.443-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_IN) on request 0B9C98A8: 5 bytes of data.
2023-11-22T09:01:51.443-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: TLSv1.2 (IN), TLS handshake, Server key exchange (12):
2023-11-22T09:01:51.443-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_IN) on request 0B9C98A8: 333 bytes of data.
2023-11-22T09:01:51.443-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_OUT) on request 0B9C98A8: 5 bytes of data.
2023-11-22T09:01:51.443-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: TLSv1.2 (OUT), TLS alert, decrypt error (563):
2023-11-22T09:01:51.443-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (SSL_DATA_OUT) on request 0B9C98A8: 2 bytes of data.
2023-11-22T09:01:51.443-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: error:0407008A:rsa routines:RSA_padding_check_PKCS1_type_1:invalid padding
2023-11-22T09:01:51.443-05:00 DBUG (01) [libcdk] : BasicHTTP: curl (TEXT) on request 0B9C98A8: Closing connection 0
2023-11-22T09:01:51.444-05:00 DBUG (01) [libcdk] : Found -1 peer certs for request 0B9C98A8

Purpose

This is a child article of the following: Troubleshooting SSL certificate issues in VMware Horizon

Cause

This is expected behavior in any of the below conditions:

The Connection Server is using a self-signed certificate.

The client machine is on another domain or the client machine does not have a root certificate of the connection server SSL certificate.

VMware Horizon allows policies regarding SSL handling and it is possible to block connections when the client believes that there is an error with the SSL certificate presented.

Other Potential Reasons Include:

Conflict or misconfiguration with 3rd party SSL offloading features on a network device such as key exchange algorithms or interference from SSL Decryption/ Inspection features on devices.

Resolution

Narrated Walkthrough of Remediation Steps Clent and Server Side:

Step1:It is recommended to use CA signed SSL certificate in the connection server. Please replace your default certificate with a CA-signed certificate. Please find documentation and narrated video walkthroughs on certificate creation and implementation here: Configuration of TLS/SSL certificates for Horizon View Connection Servers (89916)

If you still see the error follow the recommendations below:

Configure the group policy of the Horizon Client security setting in the golden image and use it for the desktop pool.

For more information on the VMware policies and reasons that certificates may be invalid, refer to:

Configuring Certificate Checking in View Client for Windows.

Configuring Certificate Checking in View Client for Linux

Detectable by VMware SkylineTM

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End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

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Download and Install VMware Fusion (2014097)

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