VULNERABILITY INTELLIGENCE
CVE-2017-5637
CVSS score7.5 HIGH
EPSS probability73.06%
CISA KEVNot currently listed
Published2017-10-10
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
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.
Weakness classification
- CWE-306: Missing Authentication for Critical Function
- CWE-400: Uncontrolled Resource Consumption
Primary references
- security@apache.org — Third Party Advisory
- security@apache.org — Third Party Advisory, VDB Entry
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org — Issue Tracking, Mitigation, Vendor Advisory
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org
- security@apache.org