Nikola Vouk created GUACAMOLE-711:
-------------------------------------
Summary: 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
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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