CWE-1250

The product has or supports multiple distributed components or sub-systems that are each required to keep their own local copy of shared data - such as state or cache - but the product does not ensure that all local copies remain consistent with each other.

{"xhtml:p":["In highly distributed environments, or on systems with distinct physical components that operate independently, there is often a need for each component to store and update its own local copy of key data such as state or cache, so that all components have the same \"view\" of the overall system and operate in a coordinated fashion. For example, users of a social media service or a massively multiplayer online game might be using their own personal computers while also interacting with different physical hosts in a globally distributed service, but all participants must be able to have the same \"view\" of the world. Alternately, a processor's Memory Management Unit (MMU) might have \"shadow\" MMUs to distribute its workload, and all shadow MMUs are expected to have the same accessible ranges of memory.","In such environments, it becomes critical for\n\t\tthe product to ensure that this \"shared state\" is\n\t\tconsistently modified across all distributed systems.\n\t\tIf state is not consistently maintained across all\n\t\tsystems, then critical transactions might take place\n\t\tout of order, or some users might not get the same\n\t\tdata as other users. When this inconsistency affects\n\t\tcorrectness of operations, it can introduce\n\t\tvulnerabilities in mechanisms that depend on\n\t\tconsistent state."]}

Applicable Platforms