PT-2013-52: XML External Entities Injection in Huawei SGSN USN9810
Huawei SGSN USN9810
Severity level: Medium
Impact: Internal Network Resources and File System Access, Denial of Service
Access Vector: Remote
Base Score: 5.8
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 XML External Entities Injection vulnerability in Huawei SGSN USN9810.
An XML document may contain a Document Type Definition that, among other features, allows the definition of external entities. A malicious user may perform attacks aimed at reading arbitrary files, creating a denial of service condition, scanning the demilitarized zone, etc.
How to fix
Customers can contact the Huawei Technical Assistance Center (TAC) to request upgrades
17.05.2013 - Vendor gets vulnerability details
31.07.2013 - Vendor releases fixed version and details
05.02.2014 - Public disclosure
The vulnerability was detected by Kirill Ermakov and Kirill Mosolov, Positive Research Center (Positive Technologies Company)
Reports on the vulnerabilities previously discovered by Positive Research: