(PT-2013-52) Positive Technologies Security Advisory
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/

About Positive Technologies

Positive Technologies www.ptsecurity.com is among the key players in the IT security market in Russia.

The principal activities of the company include the development of integrated tools for information security monitoring (MaxPatrol); providing IT security consulting services and technical support; development of the Securitylab leading Russian information security portal.

Among the clients of Positive Technologies, there are more than 40 state enterprises, more than 50 banks and financial organizations, 20 telecommunication companies, more than 40 plant facilities, as well as IT, service and retail companies from Russia, the CIS countries, the Baltic States, China, Ecuador, Germany, Great Britain, Holland, Iran, Israel, Japan, Mexico, the Republic of South Africa, Thailand, Turkey, and the USA.

Positive Technologies is a team of highly skilled developers, advisers and experts with years of vast hands-on experience. The company specialists possess professional titles and certificates; they are the members of various international societies and are actively involved in the IT security field development.