Windows TigerVNC server crashes on client connection

[Mukul1127]

Describe the bug
The Windows TigerVNC64 server crashes as soon as a client tries to connect.

To Reproduce
Steps to reproduce the behavior:

1. Start TigerVNC64 (User or Service)
2. Try to connect
3. It crashes

Expected behavior
It works and I am able to connect

Screenshots
If applicable, add screenshots to help explain your problem.

Client (please complete the following information):

• OS: [e.g. Windows 8.1] Windows 11 Iot Enterprise LTSC 26100.2033
• VNC client: [e.g. TigerVNC, or UltraVNC] TigerVNC
• VNC client version: [e.g. 1.8.0] 1.14.0
• Client downloaded from: [e.g. my Linux distribution] Sourceforge

Server (please complete the following information):

• OS: [e.g. Windows 8.1] Windows 11 Iot Enterprise LTSC 26100.2033
• VNC server: [e.g. TigerVNC, or UltraVNC] TigerVNC
• VNC server version: [e.g. 1.8.0] 1.14.0
• Server downloaded from: [e.g. my Linux distribution] Sourceforge
• Server was started using: [e.g. vncserver] .\winvnc4.exe -Log *:file:100

Additional context
Error log:

Thu Oct 17 17:25:01 2024
 Config:      set immutable Log
 VNCServerST: creating single-threaded server MUKUL-PC
 Registry:    duplicated ffffffff80000001 to ffffffff80000001
 Registry:    createKey(ffffffff80000001,Software\TigerVNC\WinVNC4) =
              0000000000000234
 Registry:    RegCloseKey(ffffffff80000001)
 MsgWindow:   creating window "VNCTray"
 RegConfig:   registry changed
 Config:      set Password(Binary)
 Config:      set SecurityTypes(String) to VeNCrypt,X509Vnc,TLSVnc,VncAuth
 Config:      set QueryConnect(Bool) to 1
 Config:      set QueryOnlyIfLoggedOn(Bool) to 1
 Config:      set PortNumber(Int) to 5900
 Config:      set IdleTimeout(Int) to 0
 Config:      set LocalHost(Bool) to 0
 Config:      set Hosts(String) to +,
 Config:      set AcceptKeyEvents(Bool) to 1
 Config:      set RawKeyboard(Bool) to 0
 Config:      set AcceptPointerEvents(Bool) to 1
 Config:      set AcceptCutText(Bool) to 1
 Config:      set SendCutText(Bool) to 1
 Config:      set DisableLocalInputs(Bool) to 0
 Config:      set DisconnectAction(String) to None
 Config:      set RemoveWallpaper(Bool) to 0
 Config:      set DisableEffects(Bool) to 0
 Config:      set UpdateMethod(Int) to 0
 Config:      set PollConsoleWindows(Bool) to 1
 Config:      set UseCaptureBlt(Bool) to 1
 RegConfig:   unable to process UseHooks
 Config:      set Protocol3.3(Bool) to 0
 Config:      set X509Cert(String) to
              C:\Users\Mukul\Documents\Cloudflare\vnc.mookul.dev\vnc.mookul.dev.pem
 Config:      set X509Key(String) to
              C:\Users\Mukul\Documents\Cloudflare\vnc.mookul.dev\vnc.mookul.dev.key
 ManagedListener: set server to 000000de6e9ff090
 ManagedListener: set port to 5900
 MsgWindow:   null _this in 00000000001d0c58, message 24
 MsgWindow:   null _this in 00000000001d0c58, message 81
 ManagedListener: set filter to +,
 VNCServerWin32: Refreshing tray icon
 VNCServerWin32: Entering message loop
 MsgWindow:   null _this in 00000000001d0c58, message 83
 MsgWindow:   created window "VNCTray" (00000000001d0c58)

Thu Oct 17 17:25:10 2024
 SocketManager: accepting incoming connection
 TcpSocket:   ACCEPT [::1]
 Connections: accepted: [::1]::51500
 SConnection: reading protocol version
 SConnection: Client needs protocol version 3.8
 SConnection: processing security type message
 SConnection: processing security type message
 SConnection: Client requests security type VeNCrypt(19)
 SConnection: processing security message
 SConnection: processing security message
 SConnection: processing security message
 SVeNCrypt:   Client requests security type X509Vnc (261)
 TLS:         Process security message (session 0000000000000000)
 TLS:         X509 session has been set
 TLS:         Deferring completion of TLS handshake: Resource temporarily
              unavailable, try again.
 SConnection: processing security message
 TLS:         Process security message (session 000002b1503a5d20)
 TLS:         Deferring completion of TLS handshake: Resource temporarily
              unavailable, try again.
 SConnection: processing security message
 TLS:         Process security message (session 000002b1503a5d20)
 TLS:         TLS handshake completed with
              (TLS1.3)-(ECDHE-SECP256R1)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM)

Thu Oct 17 17:25:14 2024
 SConnection: processing security message
 VNCServerST: starting desktop
 SDisplay:    starting
 SDisplay:    Attaching to virtual desktop
 SDisplay:    deleting old pixel buffer & device
 SDisplay:    creating pixel buffer
 DeviceContext: 32-bit BitFields: (ff0000, ff00, ff)
 DIBSectionBuffer: recreateBuffer()
 MsgWindow:   creating window "rfb::win32::SDisplayCorePolling"
 MsgWindow:   null _this in 00000000004b0900, message 24
 MsgWindow:   null _this in 00000000004b0900, message 81
 MsgWindow:   null _this in 00000000004b0900, message 83
 MsgWindow:   created window "rfb::win32::SDisplayCorePolling"
              (00000000004b0900)
 SDisplayCorePolling: setScreenRect
 SDisplay:    Started Polling
 MsgWindow:   creating window "WMMonitor"
 MsgWindow:   null _this in 00000000006c099c, message 24
 MsgWindow:   null _this in 00000000006c099c, message 81
 MsgWindow:   null _this in 00000000006c099c, message 83
 MsgWindow:   created window "WMMonitor" (00000000006c099c)
 MsgWindow:   creating window "Clipboard"
 MsgWindow:   null _this in 00000000005c0bd8, message 24
 MsgWindow:   null _this in 00000000005c0bd8, message 81
 MsgWindow:   null _this in 00000000005c0bd8, message 83
 MsgWindow:   created window "Clipboard" (00000000005c0bd8)
 Clipboard:   local clipboard changed by 00000000000700a2
 Clipboard:   no clipboard notifier registered
 Clipboard:   registered clipboard handler
 SDisplay:    started

The process is dead.

[CendioOssman]

Thanks for your report. Possible duplicate of #943.

Unfortunately, WinVNC does not have anyone maintaining it. So it is unlikely that anyone will be looking at this anytime soon. :/