CWE-1267 - Policy Uses Obsolete Encoding
- Abstraction:Base
- Structure:Simple
- Status:Draft
- Release Date:2020-02-24
- Latest Modification Date:2023-06-29
Weakness Name
Policy Uses Obsolete Encoding
Description
The product uses an obsolete encoding mechanism to implement access controls.
Within a System-On-a-Chip (SoC), various circuits and hardware engines generate transactions for the purpose of accessing (read/write) assets or performing various actions (e.g., reset, fetch, compute, etc.). Among various types of message information, a typical transaction is comprised of source identity (identifying the originator of the transaction) and a destination identity (routing the transaction to the respective entity). Sometimes the transactions are qualified with a Security Token. This Security Token helps the destination agent decide on the set of allowed actions (e.g., access to an asset for reads and writes). A policy encoder is used to map the bus transactions to Security Tokens that in turn are used as access-controls/protection mechanisms. A common weakness involves using an encoding which is no longer trusted, i.e., an obsolete encoding.
Common Consequences
Scope: Confidentiality, Integrity, Availability, Access Control
Impact: Modify Memory, Read Memory, Modify Files or Directories, Read Files or Directories, DoS: Resource Consumption (Other), Execute Unauthorized Code or Commands, Gain Privileges or Assume Identity, Bypass Protection Mechanism, Reduce Reliability
