ERNW Research is an independent IT Security service provider based in Heidelberg, Germany. Since its founding in 2015, the focus of ERNW Research has been on performing Research projects in all areas of IT security - publicly funded projects in cooperation with universities, customer projects, as well as internal research projects.
Our goal is to perform cutting edge research to preserve excellence, and apply our knowledge and research results in highly technical projects for our customers.
Particular fields of attention are the areas of Incident Response, Forensic Computing, Malware Analysis, and Medical Device Security, as well as advanced security assessments.
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During a customer project we identified an issue with the validation of JWT tokens that allowed us to bypass the authentication by using unsigned tokens with arbitrary payloads. During analysis we found out that this is caused by a vulnerability within the library OpenID Connect Authenticator for Tomcat.