[GUACAMOLE-1430] RDP audio redirection causing connection to drop/close (Windows 10, Guacamole 1.3.0)

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 1.3.0
• Component/s: RDP
• Labels: RDP audio bug
• Environment: Ubuntu 18.0.4 Server running guacamole-server (guacd Apache Tomcat) v1.3.0 connecting to Windows 10 with latest updates
• Assignee: Unassigned
• Reporter: Matt Visnovsky
• Created: 29/Sep/21 17:37
• Updated: 30/Sep/21 21:58
• Resolved: 30/Sep/21 21:58

Description

Remote microphone access with Windows RDP protocol is causing Guacamole connections to drop/close as soon as the redirected-audio (microphone) connection is accessed. I'm able to recreate the bug in all major browsers: Firefox, Chrome, Edge and IE11. The bug does NOT occur with native Windows 10 RDP client, so I've been able to narrow down the bug to Guacamole.

/var/log/tomcat9 logs yield no useful information.

Here's the last few lines of "cat /var/log/syslog | grep -i "guacd" at the time of the connection drop:

Sep 29 17:13:22 Guacamole guacd[20070]: RDPDR user logged on
Sep 29 17:13:48 Guacamole guacd[20070]: Accepted format: 16-bit PCM with 2 channels at 44100 Hz
Sep 29 17:13:48 Guacamole guacd[20070]: Accepted format: 16-bit PCM with 2 channels at 44100 Hz
Sep 29 17:13:58 Guacamole guacd[20070]: Connection closed.
Sep 29 17:13:58 Guacamole guacd[20070]: Internal RDP client disconnected
Sep 29 17:13:58 Guacamole guacd[20070]: User "@4e06ba07-07f8-4bb4-bc90-b6680a938c2e" disconnected (0 users remain)
Sep 29 17:13:58 Guacamole guacd[20070]: Last user of connection "$4ab6dbad-4c1c-4650-a903-68fbab3306ba" disconnected
Sep 29 17:13:58 Guacamole guacd[225]: Connection "$4ab6dbad-4c1c-4650-a903-68fbab3306ba" removed.
Sep 29 17:13:58 Guacamole tomcat9[183]: 17:13:58.135 [http-nio-8080-exec-5] DEBUG o.a.g.net.InetGuacamoleSocket - Closing socket to guacd.
Sep 29 17:14:01 Guacamole tomcat9[183]: 17:14:01.637 [http-nio-8080-exec-10] DEBUG o.a.g.net.InetGuacamoleSocket - Connecting to guacd at localhost:4822.

Issue Links

• duplicates: GUACAMOLE-1283 Legacy RDP encryption may fail with "ERRINFO_DECRYPT_FAILED"