Switch 4.68 Code Execution
Posted on 23 December 2015
Document Title: =============== Switch v4.68 - Code Execution Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1649 Release Date: ============= 2015-11-23 Vulnerability Laboratory ID (VL-ID): ==================================== 1649 Common Vulnerability Scoring System: ==================================== 8.2 Product & Service Introduction: =============================== http://www.nch.com.au/components/fr/switchsetup.exe Abstract Advisory Information: ============================== An independent vulnerability laboratory researcher discovered a code execution vulnerability in the official Switch v4.68 software. Vulnerability Disclosure Timeline: ================================== 2015-11-23: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== NCH Software Product: Switch 4.68 Exploitation Technique: ======================= Local Severity Level: =============== High Technical Details & Description: ================================ A local code execution vulnerability has been discovered in the official Switch v4.68 software. The bug allows a local attacker to execute malicious codes by interaction with a vulnerable software input field. The security vulnerability is present in the `url` input field when processing to convert the audio stream data. Local attackers are able to inject malicious payloads as url input for the audio convert to compromise the software system process. The vulnerability can be exploited by local attackers without interaction. The severity of the issue is high and the bug can be exploited because of a misconfigured url input validation mechanism. The security risk of the code execution vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 8.2. Exploitation of the vulnerability requires a low privilege system user account and no user interaction. Successful exploitation of the software vulnerability results in system compromise by a classic url code execution. Vulnerable Module(s): [+] Convert Vulnerable Input(s): [+] url Affected Module(s): [+] Audio Stream Proof of Concept (PoC): ======================= The vulnerability can be exploited by local network attackers without privileged device user account 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. Launch Switch.exe 2. Click convert > Convert the audio data stream 3. Paste malicious url in input `Enter url of the audio stream` 4. Click start the audio stream 5. PHP code executed successfully! PoC: Code Execution Calculator eval(base64_decode('ZXZhbChiYXNlNjRfZGVjb2RlKCdaWFpoYkNoaVlYTmxOalJmWkdWamIy UmxLQ2RhV0doc1dYbG5ibEY2Y0dOV01HeFBVa1U1V0ZVeGVIcGxXRTR3V 2xjd2VrMXNlR3BaVjNocVRHMVdORnBUWTNCUGR6MDlKeWtwT3c9PScpKTs=')); ?> Security Risk: ============== The security risk of the code execution vulnerability in the convert module of the switch software is estimated as high. (CVSS 8.2) Credits & Authors: ================== ZwX - (http://zwx.fr) [ http://www.vulnerability-lab.com/show.php?user=ZwX ] 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. 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