Amazon Audible Software Privilege Escalation Vulnerability

Risk: Medium
Local: No
Remote: Yes
CWE: CWE-426

CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

Aloha, *Introduction:* Vendor: Amazon Affected Product: Audible Software for Windows PC Fixed in: Latest Version released by the vendor Vendor Website: <> 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 attacker’s 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 ( 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 < and-directory-poisoning.html>, < and <> 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 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

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