[FD] FreeYouTubeToMP3 Converter 4.0.1 - Buffer Overflow Vulnerability

Document Title: =============== FreeYouTubeToMP3 Converter 4.0.1 - Buffer Overflow Vulnerability References (Source): ==================== http://ift.tt/1MWHwZa Release Date: ============= 2015-10-06 Vulnerability Laboratory ID (VL-ID): ==================================== 1613 Common Vulnerability Scoring System: ==================================== 7.2 Product & Service Introduction: =============================== Free YouTube to MP3 Converter is the world`s best software that lets you convert YouTube videos to MP3 and lossless. 300 Million people have enjoyed our software so far! It is the best choice to convert playlists and user channels to MP3. Download the music you love. Download your favorite artists music for a playback. Сonvert to MP3 keeping the best possible quality (up to 320 kbps). Music in bulk. Find playlists and YouTube channels to match your mood. Download and convert in a moment. Pure sound. Convert to lossless. Formats available: WAV, FLAC, ALAC. Perfect match. Convert YouTube to any device possible. Output formats: MP3, M4A, AAC, WMA, OGG. DVDVideoSoft`s products are freeware. In order to maintain product development and provide you with high-quality software, DVDVideoSoft may bundle links to other websites and third-party apps installations including toolbars in its products. Every time DVDVideoSoft products are installed, you have an obvious option to accept or opt-out of such installations. (Copy of the Vendor Homepage: http://ift.tt/1Lsn0Ml ) Abstract Advisory Information: ============================== An independent vulnerability laboratory researcher discovered a local buffer overflow vulnerability in the official Free Youtube To MP3 Converter v4.0.1 software. Vulnerability Disclosure Timeline: ================================== 2015-10-06: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== DVDVideoSoft Ltd. Product: Free YouTube to MP3 Converter - Software (Windows) 4.0.1.1001 Exploitation Technique: ======================= Local Severity Level: =============== High Technical Details & Description: ================================ A classic buffer overflow vulnerability has been discovered in the official Free Youtube To MP3 Converter v4.0.1 software. The local vulnerability allows to overwrite the registers of the software process to compromise the target computer system. The vulnerability is located in the `Go Menu > Tools > Options > Key Activation` module. Local attackers are able to include malicious unicode payload as `key` value (input) to crash the software via buffer overflow. Local attackers are able to takeover the system process by an escalate of privileges in the local target computer system. The windows version of the software is affected by the vulnerability. The vulnerable input is located in the activation key module. The security risk of the buffer overflow vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 7.2. Exploitation of the vulnerability requires a low privilege system user account and no user interaction. Successful exploitation of the local vulnerability results in system compromise by elevation of privileges via overwrite of the registers. Vulnerable Module(s): [+] Go Menu > Tools > Options > Key Activation Vulnerable Input(s): [+] Activation Key Affected Module(s): [+] Activate Proof of Concept (PoC): ======================= The security vulnerability can be exploited by local attackers with restricted account or system access and without user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. Manual steps to reproduce the vulnerability ... 1. Execute Free-YouTube-To-MP3-Converter.exe 2. Copy the AAAA...string from bof.txt to clipboard 3. Go Menu -> Tools -> Options 4. Paste it the input Activation Key AAAA....string click Activate 5. Software will Crash 6. Successful reproduce of the local buffer overflow vulnerability!

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