#1534 Viewer regression with version 2.8.53 ?

[AndiP]

Hi,

today I noticed, I cannot connect to my Raspberry 4 (Raspbian / RaspberryOS) anymore with the latest version of Tight VNC viewer (version 2.8.53).

The Rasbperry runs RealVNC, which comes preinstalled as standard and is configured to use VNCAuth, i.e. only a fix password.

However when I connect with the latest viewer version, it asks for username and password instead of password only. Whatever i try, it does not let me in.

Going back to viewer version 2.8.27 immediately does everything correct and let me connect again.

Interestingly, on the Raspberry server, I get the following log entry whenever I try to connect with the latest viewer version which fails:
(TCP) ([Rsa] Unsupported RSA key length)

When I capture a detailed viewer log, it shows the following snippet:

[12688/10084] 2020-11-24 12:30:54:754 : Connection is established
[12688/10084] 2020-11-24 12:30:54:754 - Protocol stage is "Handshake".
[12688/13400] 2020-11-24 12:30:54:786   client rect: 0, 0; 128, 31
[12688/13400] 2020-11-24 12:30:54:787   Desktop-window. (x, y): (0, 29); (w, h): (128, 2)
[12688/10084] 2020-11-24 12:30:54:805 - Server sent protocol version: RFB 005.000
[12688/10084] 2020-11-24 12:30:54:805 - Send to server protocol version: RFB 003.008
[12688/10084] 2020-11-24 12:30:54:805 - Protocol stage is "Authentication".
[12688/10084] 2020-11-24 12:30:54:805 : Negotiating about security type...
[12688/10084] 2020-11-24 12:30:54:805 : Reading list of security types...
[12688/10084] 2020-11-24 12:30:54:806   List of security type is read
[12688/10084] 2020-11-24 12:30:54:806 : Security Types received (6): Unknown type (13), Unknown type (5), Unknown type (6), Unknown type (130), VNC (2), Unknown type (192)
[12688/10084] 2020-11-24 12:30:54:806   Selecting auth-handler
[12688/10084] 2020-11-24 12:30:54:806 - Security type is selected: 130
[12688/10084] 2020-11-24 12:30:54:806 - Authentication type accepted: Unknown type (130)
[12688/10084] 2020-11-24 12:30:54:806 : Authentication...
[12688/10084] 2020-11-24 12:30:58:043 : Auth result is 2048
[12688/10084] 2020-11-24 12:30:58:043 + Authentication failure
[12688/10084] 2020-11-24 12:31:02:627 - onDisconnect: Connection has been gracefully closed

Is this a know regression with latest viewer, or do I need to configure something differently in this version?

Thank you
Andi

[AndiP]

Forgot to say - I am more than happy to give a test version a try, once one is available.
Everything I can do to investigate this, just give me a shout.

Thanks
Andi

[sdaau]

See also: https://superuser.com/questions/1604723/tightvnc-suddenly-asking-for-username

[Anton]

fixed version

[AndiP]

Wow, that was quick!!!

Just tested and I can confirm, this is back to normal now.

Many thanks for the fast turnaround, much appreciated.

Andi