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Uncontrolled Resource Consumption

CVE-2017-5637

High
7.5/10

Summary

Two four letter word commands "wchp/wchc" are CPU-intensive and could cause spike of CPU utilization on Apache ZooKeeper server if abused, which leads to the server being unable to serve legitimate client requests. Apache ZooKeeper versions 3.4.0 prior to 3.4.10 and 3.5.0-alpha prior to 3.5.3-beta suffer from this issue, fixed in 3.4.10, 3.5.3-beta, and later.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-400 - Uncontrolled resource consumption

An uncontrolled resource allocation attack (also known as resource exhaustion attack) triggers unauthorized overconsumption of the limited resources in an application, such as memory, file system storage, database connection pool entries, and CPU. This may lead to denial of service for valid users and degradation of the application's functionality as well as that of the host operating system.

References

Advisory Timeline

  • Published