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PostPosted: 2008-08-08 23:06 
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Joined: 2004-02-23 20:49
Posts: 22519
Code:
Status: Server did not properly shut down TLS connection
Error:  Could not read from transfer socket: ECONNABORTED - Connection aborted


If you get this error if listing a directory or if downloading a file, it means that your server did not send the SSL/TLS closure notification as required by the SSL/TLS specifications.

Closing the data connection for the transfer connection without an orderly SSL/TLS shutdown violates the specifications. Furthermore, not performing the shutdown is indistinguishable from an attacker sending spoofed FIN TCP packets to the server, leading to truncated, yet apparently complete, successful transfers.

Previous versions of FileZilla did not detect this faulty behavior and were vulnerable to spoofed FIN packets. The most recent version correctly complains about the server.

Partial list of broken servers:
  • FileZilla Server <=0.9.26
  • vsftpd <=2.0.6
  • ProFTPD <=1.3.2rc1
  • Xlight FTP server <= 2.861

Partial list of proper servers:
  • FileZilla Server >=0.9.27
  • vsftpd >=2.0.7
  • ProFTPD 1.3.2rc2
  • Xlight FTP Server >=3.0


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PostPosted: 2008-09-13 17:52 
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226 Transfer OK
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Joined: 2006-05-01 03:28
Posts: 19637
Location: Germany
Please discuss in the new discussion thread. The sticky got rather messed up so let's keep it clean. :wink: Moved all posts there, have fun!

Discussion thread is now read-only.

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