Amazon Audible DLL Hijacking

`Aloha,  
  
*Introduction:*  
Vendor: Amazon  
Affected Product: Audible Software for Windows PC  
Fixed in: Latest Version released by the vendor  
Vendor Website: https://www.audible.com/  
<https://www.audible.com/sw?pageFlowType=PC_WIZARD>  
Vulnerability Type: Privilege Escalation  
CVE: CVE-2017-17069  
Credit: Himanshu Mehta (@LionHeartRoxx)  
  
*Summary:*  
Audible contains a privilege escalation vulnerability that could allow an  
unauthenticated, remote attacker to execute arbitrary code on the targeted  
system and gain elevated privileges. The vulnerability exists due to some  
DLL file is loaded by 'ActiveSetupN.exe' improperly. And it allows an  
attacker to load this DLL file of the attackeras choosing that could  
execute arbitrary code without the user's knowledge.  
  
*Affected Product*:  
Audible Software for Windows PC  
  
*Tested on*: Windows 7  
  
*Impact:*  
Attacker can exploit this vulnerability to load a DLL file of the  
attacker's choosing that could execute arbitrary code. This may help  
attacker to successfully exploit the system if user creates shell as a DLL.  
  
*Vulnerability Scoring Details:*  
The vulnerability classification has been performed by using the CVSSv2  
scoring system (http://www.first.org/cvss/).  
Base Score: 7.2 (AV:L/AC:L/Au:N/C:C/I:C/A:C)  
  
  
*More Details*:  
For software downloaded with a web browser the application directory is  
typically the user's "Downloads" directory: see <  
https://insights.sei.cmu.edu/cert/2008/09/carpet-bombing-  
and-directory-poisoning.html>,  
<http://blog.acrossecurity.com/2012/02/downloads-folder-binary-planting.html  
>  
and <http://seclists.org/fulldisclosure/2012/Aug/134> for "prior art" about  
this well-known and well-documented vulnerability.  
  
If an attacker places malicious DLL in the user's "Downloads" directory  
(for example per "drive-by download" or "social engineering") this  
vulnerability becomes a remote code execution.  
  
*Proof of concept/demonstration*:  
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
1. Create a malicious 'dwmapi.dll' file and save it in your "Downloads"  
directory.  
  
2. Download 'ActiveSetupN.exe' from https://www.audible.com/sw?  
pageFlowType=PC_WIZARD and save it in your "Downloads" directory.  
  
3. Execute .exe from your "Downloads" directory.  
  
4. Malicious dll file gets executed.  
  
Chao!!  
Himanshu Mehta  
`