Denial of Service Vulnerability in Apache ZooKeeper Server
CVE-2017-5637

7.5HIGH

Key Information:

Vendor

Apache
Status
Apache Zookeeper
Vendor
CVE Published:
10 October 2017

What is CVE-2017-5637?

A vulnerability in Apache ZooKeeper allows specific four-letter word commands, namely 'wchp' and 'wchc', to consume excessive CPU resources. This makes it difficult for the server to handle legitimate client requests, potentially leading to a denial of service. Versions affected include 3.4.9 and 3.5.2, with fixes implemented in subsequent versions (3.4.10 and 3.5.3).

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Affected Version(s)

Apache ZooKeeper 3.4.0 to 3.4.9

Apache ZooKeeper 3.5.0 to 3.5.2

References

https://lists.apache.org/thread.html/58170aeb7a681d462b7f...
mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/98814
vdb-entryx_refsource_BID
https://access.redhat.com/errata/RHSA-2017:3355
vendor-advisoryx_refsource_REDHAT

EPSS Score

17% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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