CVSS 3.0
7.5 highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2017-5637
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.
Severity
- EPSS
- 73% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-306, CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Affected
- apache:zookeeper
- debian:debian_linux
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-7cwj-j333-x7f7 | Maven | org.apache.zookeeper:zookeeper | >=3.4.0 <3.4.10 | 3.4.10 |
| GHSA-7cwj-j333-x7f7 | Maven | org.apache.zookeeper:zookeeper | >=3.5.0 <3.5.3 | 3.5.3 |