PT-2013-55: Access Restrictions Bypassing in Huawei SGSN USN9810
Huawei SGSN USN9810
Severity level: Medium
Impact: Information Disclosure
Access Vector: Remote
Base Score: 5.4
CVE: not assigned
Huawei SGSN USN9810 is a unified service node designed by Huawei. It can be used in the 2.5G General Packet Radio Service (GPRS) system, 3G Universal Mobile Telecommunications System (UMTS), and evolved packet core (EPC) system.
The specialists of the Positive Research center have detected an Access Restrictions Bypassing vulnerability in Huawei SGSN USN9810.
The platform does not provide sufficient entropy in session identifiers. This allows an attacker to brute force the current ID to bypass the authorization mechanisms and thus obtain access to the administrator session.
How to fix
Customers can contact the Huawei Technical Assistance Center (TAC) to request upgrades
29.05.2013 - Vendor gets vulnerability details
31.07.2013 - Vendor releases fixed version and details
05.02.2014 - Public disclosure
The vulnerability was detected by Timur Yunusov, Alexey Osipov and Gleb Gritsai, Positive Research Center (Positive Technologies Company)
Reports on the vulnerabilities previously discovered by Positive Research: