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CWE-1267 - Policy Uses Obsolete Encoding

CWE-1267

  • Abstraction:
  • Base
  • Structure:
  • Simple
  • Status:
  • Draft
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

Related Weaknesses
  • Release Date:
  • 2020-02-24
  • Latest Modification Date:
  • 2023-06-29

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