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 unable to serve legitimate client requests. Apache ZooKeeper thru version 3.4.9 and 3.5.2 suffer from this issue, fixed in 3.4.10, 3.5.3, and later.
Metrics
Affected Vendors & Products
Advisories
Source | ID | Title |
---|---|---|
![]() |
DLA-986-1 | zookeeper security update |
![]() |
DSA-3871-1 | zookeeper security update |
![]() |
GHSA-7cwj-j333-x7f7 | Uncontrolled Resource Consumption in Apache ZooKeeper |
![]() |
USN-4789-1 | Apache ZooKeeper vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.

Status: PUBLISHED
Assigner: apache
Published:
Updated: 2024-09-17T00:16:26.240Z
Reserved: 2017-01-29T00:00:00
Link: CVE-2017-5637

No data.

Status : Deferred
Published: 2017-10-10T01:30:22.360
Modified: 2025-04-20T01:37:25.860
Link: CVE-2017-5637


No data.