Document Title: =============== Huawei Backup App v6.30.52.12.L - Session Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1815 Video: https://www.vulnerability-lab.com/get_content.php?id=1987 Release Date: ============= 2018-07-30 Vulnerability Laboratory ID (VL-ID): ==================================== 1815 Common Vulnerability Scoring System: ==================================== 5.9 Vulnerability Class: ==================== Insufficient Session Validation Current Estimated Price: ======================== 500€ - 1.000€ Product & Service Introduction: =============================== Huawei Backup App v6.30.52.12.L Abstract Advisory Information: ============================== A misconfiguration issue and session vulnerability has been discovered in the official Huawei Backup App v6.30.52.12.L for the android mobile phones. Vulnerability Disclosure Timeline: ================================== 2018-07-30: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Huawei Product: Hauwei Backup App - Mobile (API) 6.30.52.12.L Exploitation Technique: ======================= Local Severity Level: =============== Medium Authentication Type: ==================== Full authentication (admin) - full privileges User Interaction: ================= No User Interaction Disclosure Type: ================ Responsible Disclosure Program Technical Details & Description: ================================ A configuration and session vulnerability has been discovered in the official Hauwei Backup App 6.30.52.12.L for the android mobile phones. Local Attackers are able to reset the password of the Backup Encryption Area to get access to backup files and restore or copy them as well. The vulnerability is located in the application folder `HuaweiBackup - BackupFiles` with the `Name of the Backup folder`. The new issue affects the file called `info.xml` which is storing the encrypted passwords inside. It is possible to bypass and reset the current password successfully by modifying the `checkmsg` parameter value with another encrypted password type . Due to our investigation Huawei Backup android application comes default to all huawei mobile products. Vunerable Module(s): [+] HuaweiBackup - BackupFiles - (Name of the Backup Folder) Vulnerable File(s): [+] info.xml Vulnerable Parameter(s): [+] checkmsg Proof of Concept (PoC): ======================= The configuration and session vulnerability can be exploited by remote attackers with low privileged web-application 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. Goes to `Huawei Backup folder` - `ackupFiles` - `name of current backup` 2. Rename the file " info.xml " into "info.txt" for editing . 3. Find the parameter " checkmsg" and replace the current encrypted value into another one . 4. The password reset successfully ! 5. Hackers are able to get access into it using the new password as well 6. Successful reproduce of the vulnerability in the huawei backup app! PoC: Video https://www.youtube.com/watch?v=3nZJoRU0stE Solution - Fix & Patch: ======================= The vulnerability has been patched and the product received at the location a work-around to ensure the stable core security. Security Risk: ============== The security risk of the software vulnerability in the huawei backup mobile app is estimated as medium. 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