CVE-2017-5637

Summary

CVECVE-2017-5637
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-10-10 01:30:00 UTC
Updated2023-11-07 02:49:00 UTC
DescriptionTwo 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.

Risk And Classification

Problem Types: CWE-400 | CWE-306

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Apache Zookeeper 3.4.0 All All All
Application Apache Zookeeper 3.4.1 All All All
Application Apache Zookeeper 3.4.2 All All All
Application Apache Zookeeper 3.4.3 All All All
Application Apache Zookeeper 3.4.4 All All All
Application Apache Zookeeper 3.4.5 All All All
Application Apache Zookeeper 3.4.6 All All All
Application Apache Zookeeper 3.4.7 All All All
Application Apache Zookeeper 3.4.8 All All All
Application Apache Zookeeper 3.4.9 All All All
Application Apache Zookeeper 3.5.0 All All All
Application Apache Zookeeper 3.5.1 All All All
Application Apache Zookeeper 3.5.2 All All All
Application Apache Zookeeper 3.4.0 All All All
Application Apache Zookeeper 3.4.1 All All All
Application Apache Zookeeper 3.4.2 All All All
Application Apache Zookeeper 3.4.3 All All All
Application Apache Zookeeper 3.4.4 All All All
Application Apache Zookeeper 3.4.5 All All All
Application Apache Zookeeper 3.4.6 All All All
Application Apache Zookeeper 3.4.7 All All All
Application Apache Zookeeper 3.4.8 All All All
Application Apache Zookeeper 3.4.9 All All All
Application Apache Zookeeper 3.5.0 All All All
Application Apache Zookeeper 3.5.1 All All All
Application Apache Zookeeper 3.5.2 All All All
Operating System Debian Debian Linux 8.0 All All All
Operating System Debian Debian Linux 8.0 All All All

References

ReferenceSourceLinkTags
Oracle Critical Patch Update Advisory - July 2020 MISC www.oracle.com
Red Hat Customer Portal REDHAT access.redhat.com
Oracle Critical Patch Update Advisory - July 2021 N/A www.oracle.com
Debian -- Security Information -- DSA-3871-1 zookeeper DEBIAN www.debian.org Third Party Advisory
[ZOOKEEPER-2693] DOS attack on wchp/wchc four letter words (4lw) - ASF JIRA CONFIRM issues.apache.org Issue Tracking, Mitigation, Vendor Advisory
Red Hat Customer Portal REDHAT access.redhat.com
Pony Mail! lists.apache.org
Red Hat Customer Portal REDHAT access.redhat.com
Pony Mail! lists.apache.org
Apache Mail Archives lists.apache.org
Apache Mail Archives MLIST lists.apache.org Mailing List, Vendor Advisory
Pony Mail! MLIST lists.apache.org
Pony Mail! MLIST lists.apache.org
Pony Mail! MLIST lists.apache.org
Pony Mail! lists.apache.org
Malformed Request BID www.securityfocus.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report