Typical severity: Medium. Likelihood of attack: Low. An adversary exploits incorrect chaining or granularity of hardware debug components in order to gain unauthorized access to debug functionality on a chip. This happens when authorization is not checked on a per function basis and is assumed for a chain or group of debug functionality.
Implement: Ensure that debug components are properly chained, and their granularity is maintained at different authorization levels | Perform Post-silicon validation tests at various authorization levels to ensure that debug components are only accessible to authorized users