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Investigate segfault in tigervnc probably triggered by malicious bot #13

@ketsapiwiq

Description

@ketsapiwiq
Wed Nov 25 15:26:03 2020
 Connections: accepted: 213.108.134.33::43254

Wed Nov 25 15:26:04 2020
 SConnection: Client needs protocol version 3.8
(EE) 
(EE) Backtrace:
(EE) 0: /usr/bin/Xtigervnc (OsLookupColor+0x13c) [0x555a8b6e739c]
(EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60) [0x7f0cefd6341f]
(EE) 2: /usr/bin/Xtigervnc (_ZN3rfb10SMsgWriter8startMsgEi+0xc) [0x555a8b65be0c]
(EE) 3: /usr/bin/Xtigervnc (_ZN3rfb10SMsgWriter18writeServerCutTextEPKc+0x4e) [0x555a8b65c31e]
(EE) 4: /usr/bin/Xtigervnc (_ZN3rfb11SConnection17sendClipboardDataEPKc+0x5e) [0x555a8b6578ee]
(EE) 5: /usr/bin/Xtigervnc (_ZN3rfb11VNCServerST17sendClipboardDataEPKc+0x56) [0x555a8b64f4e6]
(EE) 6: /usr/bin/Xtigervnc (_ZN14XserverDesktop17sendClipboardDataEPKc+0xf) [0x555a8b64236f]
(EE) 7: /usr/bin/Xtigervnc (vncSendClipboardData+0x30) [0x555a8b637380]
(EE) 8: /usr/bin/Xtigervnc (vncGetScreenImage+0xb9d) [0x555a8b64050d]
(EE) 9: /usr/bin/Xtigervnc (Dispatch+0x313) [0x555a8b6923c3]
(EE) 10: /usr/bin/Xtigervnc (dix_main+0x374) [0x555a8b696424]
(EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0x7f0cef29a0b3]
(EE) 12: /usr/bin/Xtigervnc (_start+0x2e) [0x555a8b561e1e]
(EE) 
(EE) Segmentation fault at address 0x10
(EE) 
Fatal server error:
(EE) Caught signal 11 (Segmentation fault). Server aborting
(EE) 
Gdk-Message: 15:26:04.311: /usr/lib/firefox/firefox: Fatal IO error 11 (Resource temporarily unavailable) on X server :1.0.

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