Skype 7.16.0.102 DLL Hijacking

`Vulnerability Title: Skype Insecure Library Loading Vulnerability  
(api-ms-win-core-winrt-string-l1-1-0.dll)  
Affected Product: Skype  
Vendor Homepage: https://www.microsoft.com/en-us/  
MSRC Case 32355 TRK:0001002846  
CVE-ID : CVE-2017-6517  
Severity: Medium  
  
*Description:*  
  
Microsoft Skype contains a DLL hijacking vulnerability that could allow an  
unauthenticated attacker to execute arbitrary code on the targeted system.  
This vulnerability exists due to some DLL file loaded by aSkype.exea  
improperly. And it allows an attacker to load  
(api-ms-win-core-winrt-string-l1-1-0.dll) this DLL file of the attackeras  
choosing that could execute arbitrary code without the user's knowledge.  
  
*Affected Product:*  
  
Skype 7.16.0.102  
  
*Impact:*  
  
Attacker can exploit the vulnerability to load a DLL file of the attacker's  
choosing that could execute arbitrary code. This may help attacker to  
successful exploits the system if user creates shell as a DLL.  
  
*Proof-Of-Concept :*  
  
1. Create malicious dll file and save it as  
'api-ms-win-core-winrt-string-l1-1-0.dll' in your "Downloads" directory.  
  
2. Download Skype 7.16.0.102 and save it in your "Downloads"  
directory.  
  
3. Execute Skype.exe from your "Downloads" directory.  
  
4. Malicious dll file gets executed.  
  
*Credit:*  
  
*Sachin Wagh (tiger_tigerboy)*  
`