Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2017-5637

Severity CVSS v4.0:
Pending analysis
Type:
CWE-306 Missing Authentication for Critical Function
Publication date:
10/10/2017
Last modified:
20/04/2025

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.

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:zookeeper:3.4.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.4:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.5:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.4.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.5.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.5.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:zookeeper:3.5.2:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools