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https://issues.apache.org/jira/browse/GUACAMOLE-711?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Jumper closed GUACAMOLE-711.
------------------------------------
Resolution: Invalid
> segfault when connecting to RealVNC Server
> ------------------------------------------
>
> Key: GUACAMOLE-711
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-711
> Project: Guacamole
> Issue Type: Bug
> Components: guacd
> Affects Versions: 0.9.14
> Environment: ubuntu 18.04
> Reporter: Nikola Vouk
> Priority: Blocker
>
> Guacd segfaults when connecting to RealVNC server in loop. I reduce protocol
> support on RealVNC server to 3.8 and it still segfaults.
>
> Doesn't seem to work in any mode with RealVNC server (v6 latest)
>
>
>
> Jan 21 16:09:37 vormir guacd[25649]: Cursor rendering: local
> Jan 21 16:09:37 vormir guacd[25649]: User
> "@d3168c3d-c7bd-4f63-a92b-6bd9a8b5b8f3" joined connection
> "$17f9006a-a75b-4e7b-a240-d59b8d5ba08d" (1 users now present)
> Jan 21 16:09:37 vormir guacd[25649]: VNC server supports protocol version 5.0
> (viewer 3.8)
> Jan 21 16:09:37 vormir guacd[25649]: We have 5 security types to read
> Jan 21 16:09:37 vormir guacd[25649]: 0) Received security type 13
> Jan 21 16:09:37 vormir guacd[25649]: 1) Received security type 133
> Jan 21 16:09:37 vormir guacd[25649]: 2) Received security type 5
> Jan 21 16:09:37 vormir guacd[25649]: 3) Received security type 129
> Jan 21 16:09:37 vormir guacd[25649]: 4) Received security type 192
> Jan 21 16:09:37 vormir guacd[25649]: Unknown authentication scheme from VNC
> server: 13, 133, 5, 129, 192
> Jan 21 16:09:37 vormir guacd[25649]: Unable to connect to VNC server.
> Jan 21 16:09:41 vormir kernel: [2432033.730381] guacd[25652]: segfault at 10
> ip 00007f751eabcf32 sp 00007f751fcc5cb0 error 4 in
> libguac-client-vnc.so.0.0.0[7f751eab7000+d000]
> Jan 21 16:09:41 vormir guacd[23513]: Connection
> "$17f9006a-a75b-4e7b-a240-d59b8d5ba08d" removed.
> Jan 21 16:11:56 vormir guacd[23513]: Creating new client for protocol "vnc"
> Jan 21 16:11:56 vormir guacd[23513]: Connection ID is
> "$5e7d49fe-695d-44ae-8b96-6efc445cb40a"
> Jan 21 16:11:56 vormir guacd[25663]: Cursor rendering: local
> Jan 21 16:11:56 vormir guacd[25663]: User
> "@7e346687-feba-4bd4-882f-615acad9bc90" joined connection
> "$5e7d49fe-695d-44ae-8b96-6efc445cb40a" (1 users now present)
> Jan 21 16:11:56 vormir guacd[25663]: VNC server supports protocol version 5.0
> (viewer 3.8)
> Jan 21 16:11:56 vormir guacd[25663]: We have 5 security types to read
> Jan 21 16:11:56 vormir guacd[25663]: 0) Received security type 13
> Jan 21 16:11:56 vormir guacd[25663]: 1) Received security type 133
> Jan 21 16:11:56 vormir guacd[25663]: 2) Received security type 5
> Jan 21 16:11:56 vormir guacd[25663]: 3) Received security type 129
> Jan 21 16:11:56 vormir guacd[25663]: 4) Received security type 192
> Jan 21 16:11:56 vormir guacd[25663]: Unknown authentication scheme from VNC
> server: 13, 133, 5, 129, 192
> Jan 21 16:11:56 vormir guacd[25663]: Unable to connect to VNC server.
> Jan 21 16:12:01 vormir kernel: [2432173.992924] guacd[25666]: segfault at 10
> ip 00007f751eabcf32 sp 00007f751f4c4cb0 error 4 in
> libguac-client-vnc.so.0.0.0[7f751eab7000+d000]
> Jan 21 16:12:01 vormir guacd[23513]: Connection
> "$5e7d49fe-695d-44ae-8b96-6efc445cb40a" removed.
> Jan 21 16:16:22 vormir guacd[23513]: Creating new client for protocol "vnc"
> Jan 21 16:16:22 vormir guacd[23513]: Connection ID is
> "$a86e97e8-0c9a-4b09-80f5-877cdaf99a72"
> Jan 21 16:16:22 vormir guacd[25678]: Cursor rendering: local
> Jan 21 16:16:22 vormir guacd[25678]: User
> "@38a00a62-f7e0-4e09-ae9d-f89f849e849f" joined connection
> "$a86e97e8-0c9a-4b09-80f5-877cdaf99a72" (1 users now present)
> Jan 21 16:16:22 vormir guacd[25678]: VNC server supports protocol version 5.0
> (viewer 3.8)
> Jan 21 16:16:22 vormir guacd[25678]: We have 4 security types to read
> Jan 21 16:16:22 vormir guacd[25678]: 0) Received security type 13
> Jan 21 16:16:22 vormir guacd[25678]: 1) Received security type 133
> Jan 21 16:16:22 vormir guacd[25678]: 2) Received security type 5
> Jan 21 16:16:22 vormir guacd[25678]: 3) Received security type 129
> Jan 21 16:16:22 vormir guacd[25678]: Unknown authentication scheme from VNC
> server: 13, 133, 5, 129
> Jan 21 16:16:22 vormir guacd[25678]: Unable to connect to VNC server.
>
>
>
> .....
>
>
>
>
>
> an 21 17:10:56 vormir kernel: [2435708.568872] guacd[26638]: segfault at 10
> ip 00007f2ef2ab0f32 sp 00007f2ef34b8cb0 error 4 in
> libguac-client-vnc.so.0.0.0[7f2ef2aab000+d000]
> Jan 21 17:10:56 vormir guacd[25908]: Connection
> "$4d08eb51-726a-4107-8aee-1407037e40e1" removed.
> Jan 21 17:11:16 vormir guacd[25908]: Creating new client for protocol "vnc"
> Jan 21 17:11:16 vormir guacd[25908]: Connection ID is
> "$de564a19-20be-4530-910e-d7fe69e2d287"
> Jan 21 17:11:16 vormir guacd[26648]: Cursor rendering: local
> Jan 21 17:11:16 vormir guacd[26648]: User
> "@b208221b-5700-4cfb-9c4b-f93b64d7a62e" joined connection
> "$de564a19-20be-4530-910e-d7fe69e2d287" (1 users now present)
> Jan 21 17:11:16 vormir guacd[26648]: VNC server supports protocol version 3.3
> (viewer 3.8)
> Jan 21 17:11:16 vormir guacd[26648]: Selected Security Scheme 0
> Jan 21 17:11:16 vormir guacd[26648]: VNC connection failed: Too many security
> failures
> Jan 21 17:11:16 vormir guacd[26648]: Unable to connect to VNC server.
> Jan 21 17:11:21 vormir kernel: [2435733.604227] guacd[26651]: segfault at 10
> ip 00007f2ef2ab0f32 sp 00007f2ef44bacb0 error 4 in
> libguac-client-vnc.so.0.0.0[7f2ef2aab000+d000]
> Jan 21 17:11:21 vormir guacd[25908]: Connection
> "$de564a19-20be-4530-910e-d7fe69e2d287" removed.
> Jan 21 17:11:41 vormir guacd[25908]: Creating new client for protocol "vnc"
> Jan 21 17:11:41 vormir guacd[25908]: Connection ID is
> "$7b6f08a7-b9c1-440e-9919-ab36efe1fe2c"
> Jan 21 17:11:41 vormir guacd[26662]: Cursor rendering: local
> Jan 21 17:11:41 vormir guacd[26662]: User
> "@47f011ce-79d3-48df-84d2-6b67e9cf8d2d" joined connection
> "$7b6f08a7-b9c1-440e-9919-ab36efe1fe2c" (1 users now present)
> Jan 21 17:11:41 vormir guacd[26662]: VNC server supports protocol version 3.3
> (viewer 3.8)
> Jan 21 17:11:41 vormir guacd[26662]: Selected Security Scheme 0
> Jan 21 17:11:41 vormir guacd[26662]: VNC connection failed: Too many security
> failures
> Jan 21 17:11:41 vormir guacd[26662]: Unable to connect to VNC server.
> Jan 21 17:11:46 vormir kernel: [2435758.636422] guacd[26665]: segfault at 10
> ip 00007f2ef2ab0f32 sp 00007f2ef3cb9cb0 error 4 in
> libguac-client-vnc.so.0.0.0[7f2ef2aab000+d000]
> Jan 21 17:11:46 vormir guacd[25908]: Connection
> "$7b6f08a7-b9c1-440e-9919-ab36efe1fe2c" removed.
> Jan 21 17:12:06 vormir guacd[25908]: Creating new client for protocol "vnc"
> Jan 21 17:12:06 vormir guacd[25908]: Connection ID is
> "$3ecaad57-e9d4-4a35-8408-81615af9db9d"
> Jan 21 17:12:06 vormir guacd[26675]: Cursor rendering: local
> Jan 21 17:12:06 vormir guacd[26675]: User
> "@19fbd4ab-69b2-4eb9-b339-87208346d309" joined connection
> "$3ecaad57-e9d4-4a35-8408-81615af9db9d" (1 users now present)
> Jan 21 17:12:06 vormir guacd[26675]: VNC server supports protocol version 3.3
> (viewer 3.8)
> Jan 21 17:12:06 vormir guacd[26675]: Selected Security Scheme 0
> Jan 21 17:12:06 vormir guacd[26675]: VNC connection failed: Too many security
> failures
> Jan 21 17:12:06 vormir guacd[26675]: Unable to connect to VNC server.
> Jan 21 17:12:11 vormir kernel: [2435783.667136] guacd[26678]: segfault at 10
> ip 00007f2ef2ab0f32 sp 00007f2ef34b8cb0 error 4 in
> libguac-client-vnc.so.0.0.0[7f2ef2aab000+d000]
> Jan 21 17:12:11 vormir guacd[25908]: Connection
> "$3ecaad57-e9d4-4a35-8408-81615af9db9d" removed.
> Jan 21 17:12:31 vormir guacd[25908]: Creating new client for protocol "vnc"
> Jan 21 17:12:31 vormir guacd[25908]: Connection ID is
> "$f86607c8-dbe7-4966-b37e-489ae8468da9"
> Jan 21 17:12:31 vormir guacd[26688]: Cursor rendering: local
> Jan 21 17:12:31 vormir guacd[26688]: User
> "@b1c43690-91dc-4e12-bd69-649b4278cbfa" joined connection
> "$f86607c8-dbe7-4966-b37e-489ae8468da9" (1 users now present)
> Jan 21 17:12:31 vormir guacd[26688]: VNC server supports protocol version 3.3
> (viewer 3.8)
> Jan 21 17:12:31 vormir guacd[26688]: Selected Security Scheme 0
>
> 2515,1 93%
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