> Source: [sk181155](https://support.checkpoint.com/results/sk/sk181155)

# sk181155 - Users are not able to connect to RDP application with SNX in Application Mode

| Property | Value |
|----------|-------|
| Solution ID | sk181155 |
| Date Created | 2023-06-22 |
| Last Modified | 2024-03-13 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R81.20, R81.10 (EOS), R81 (EOS) |
| OS | Windows, Gaia |

## Symptoms

- * RDP does not work with SSL Network Extender (SNX) in Application Mode.

* In the STALog.txt (from sk104577, under "SNX client in Application Mode on Windows OS"):   

  `[ ...][DATE TIME][apijack] apijack_CreateProcessW: flags=0x14 AppName:C:\WINDOWS\system32\mstsc.exe, CommandLine:c:\windows\\System32\\mstsc.exe /v 10.10.10.10
  `  
  ` [ ...][DATE TIME][apijack] apijack_LoadLibraryExW: ntdll.dll - new ver
  `  
  ` [ ...][DATE TIME][apijack] apijack_should_hook_module: calling apijack_extract_module_name
  `  
  ` [ ...][DATE TIME][apijack] apijack_should_hook_module: module - C:\WINDOWS\SYSTEM32\ntdll.dll
  `  
  ` [ ...][DATE TIME][apijack] apijack_is_already_hooked: C:\WINDOWS\SYSTEM32\ntdll.dll already hooked
  `  
  ` [ ...][DATE TIME][apijack] apijack_GetProcAddress: Called - new ver
  `  
  ` [ ...][DATE TIME][apijack] apijack_GetProcAddress: modname=C:\WINDOWS\SYSTEM32\ntdll.dll, pszProcName=7726458c
  `  
  ` [ ...][DATE TIME][apijack] apijack_GetProcAddress: Load by name RtlGetNtSystemRoot
  `  
  ` [ ...][DATE TIME][apijack] apijack_GetProcAddress: Go get hook
  `  
  ` [ ...][DATE TIME][apijack] apijack_GetProcAddress: Check for notify procaddr
  `  
  ` [ ...][DATE TIME][apijack] apijack_GetProcAddress: return address: 77590270
  `  
  ` [ ...][DATE TIME][apijack] apijack_inject_to_process: failed to obtain thread context data: Falscher Parameter.
  `  
  ` [ ...][DATE TIME][apijack] apijack_CreateProcessW: failed to inject code into process id (5732)`

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 43
* [Jumbo Hotfix Accumulator for R81.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.10/Default.htm) starting from Take 113
* [Jumbo Hotfix Accumulator for R81](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81/Default.htm) starting from Take 89
* [Jumbo Hotfix Accumulator for R80.40](https://sc1.checkpoint.com/documents/Jumbo_HFA/R80.40/Default.htm) starting from Take 211

If you choose not to upgrade, Check Point can supply a **Hotfix** . [Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.  
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.  
For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

<br />

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