usd-2018-0002 | Starface/

Advisory ID: usd-2018-0002
CVE Number: N/A
Affected Product: Starface
Affected Version:
Vulnerability Type: Language Expression Injection
Security Risk: High
Vendor URL:
Vendor Status: Not fixed


In a Language Expression Injection attack the user input is evaluated by the Language Expression Interpreter. The attacker has access to the Java objects which are currently in scope. The impact can be leaking sensitive information up to code execution.

Proof of Concept

The ‚items‘ parameter is evaluated by the Java Language Expression Interpreter which may lead to code execution. Vulnerable Requests:
– /config/voicebox/display/
– /config/voicebox/display/
– /template/
The Language Expression Injection can also be used as xss.

=> PoC will be published when all issues are fixed.


Make sure to validate the user input before putting it into the expression language interpreter.


These security vulnerabilities were found by Sebastian Puttkammer of usd AG.


In order to protect businesses against hackers and criminals, we always have to keep our skills and knowledge up to date. Thus, security research is just as important for our work as is building up a security community to promote the exchange of knowledge. After all, more security can only be achieved if many individuals take on the task.

Our CST Academy and our usd HeroLab are essential parts of our security mission. We share the knowledge we gain in our practical work and our research through training courses and publications. In this context, the usd HeroLab publishes a series of papers on new vulnerabilities and current security issues.

Always for the sake of our mission: „more security.“

to usd AG

In accordance with usd AG’s Responsible Disclosure Policy, all vendors have been notified of the existence of these vulnerabilities.


The information provided in this security advisory is provided „as is“ and without warranty of any kind. Details of this security advisory may be updated in order to provide as accurate information as possible.