PT-2013-52: XML External Entities Injection in Huawei SGSN USN9810

Vulnerable platform

Huawei SGSN USN9810

Link:
http://www.huawei.com/

Severity level

Severity level: Medium
Impact: Internal Network Resources and File System Access, Denial of Service
Access Vector: Remote

CVSS v2:
Base Score: 5.8
Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:P)

CVE: not assigned

Platform description

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.

Vulnerability description

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

Advisory status

17.05.2013 - Vendor gets vulnerability details
31.07.2013 - Vendor releases fixed version and details
05.02.2014 - Public disclosure

Credits

The vulnerability was detected by Kirill Ermakov and Kirill Mosolov, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2013-52

Reports on the vulnerabilities previously discovered by Positive Research:

http://www.ptsecurity.com/research/advisory/
http://en.securitylab.ru/lab/

Threatscape
4G and 5G are not ready for smart cities