Filezilla Client (3.7.0.2) crashes when connecting to explicit FTP over TLS on MacOS

[Matt]

Fresh install of filezilla. First install on my new system, not update.

Add first site to the "Site Manager".
Under general settings tab set HOST, PORT, FTP, REQUIRE EXPLICIT FTP OVER TLS, NORMAL LOGIN, USER, PASSWORD.
Hit "Connect"
Filezilla crashes.

I get a very brief glimpse of the log/status window doing something before the crash. Anyone know if what is displayed in the connection status window is logged to the filesystem somewhere? If so I can grab those details as well so you know what part of the connection negotiation happens at.

Pretty sure this has to do with TLS. If I change to implicit TLS I get an "unexpected TLS packet" error when connecting, but no crash. If I change to SFTP, I can't connect, but no crash. So the only variable I am tweaking that seems to cause the crash is the "explicit TLS".

Excerpt from crash report attached.

[Matt]

MacOS Crash Report

[Matt]

I did a screen capture to get a better view of the connection status window. Looks like "Initializing TLS..." is the last status prior to crash. But screen capture is only 30 FPS, so could have easily missed a ton of other output between frames.

[Matt]

debug-enabled-log

[Matt]

I enabled logging with debug (attached). Last entry: "Status: Verifying certificate..."

Some issue with certificate validation, approving certificates that have an issue in the signing chain, missing root, etc?

[Sergio Aguayo]

Same for me, didn't happen in 3.7.0.1.

[Matt]

Based on the commend by sergioag, I installed 3.7.0.1 as a work around.

When connecting, I get the "Unknown certificate" popup window. The server I am connecting to is IP address as opposed to hostname.

I can check the box "always trust certificate in future sessions" and then connect successfully.

[Alexander Schuch]

This seems to happen without TLS as well (normal FTP), see #8715.

[Daniel L]

I can not connect via ftpes too. I add an log attachment where I use TLS1.2

[Rob]

Upgraded to 3.7.0.2 and Zilla and having same issue: It goes partially through the connect process, and seems to be connecting, but stalls when "Initializing TLS", and then the program shuts down. Uninstalled upgrade version and reinstalled as new download but same problem ... program stalls when "Initializing TLS" and shuts down.

Finally reinstalled older version (3.6.0.2) from backup and connects OK.

ORIGINAL BUG REPORT:
Fresh install of filezilla. First install on my new system, not update.
Add first site to the "Site Manager".
Under general settings tab set HOST, PORT, FTP, REQUIRE EXPLICIT FTP OVER TLS, NORMAL LOGIN, USER, PASSWORD.
Hit "Connect"
Filezilla crashes.
I get a very brief glimpse of the log/status window doing something before the crash. Anyone know if what is displayed in the connection status window is logged to the filesystem somewhere? If so I can grab those details as well so you know what part of the connection negotiation happens at.
Pretty sure this has to do with TLS. If I change to implicit TLS I get an "unexpected TLS packet" error when connecting, but no crash. If I change to SFTP, I can't connect, but no crash. So the only variable I am tweaking that seems to cause the crash is the "explicit TLS".
Excerpt from crash report attached.

[Alexander Schuch]

Can you try FileZilla 3.7.1-rc1?

"Fix crash on OS X if connecting using FTP over TLS" - so it might no work. Please test.

[Daniel L]

It works! thanks :)

Details:
FileZilla Client

---

Version: 3.7.1-rc1
Operating system:

Name: Mac OS X (Darwin 10.8.0 i386)
Version: 16.104