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Security Bulletin: Possible denial of service attack affecting Watson Knowledge Catalog for IBM Cloud Pak for Data

Security Bulletin


A vulnerability in the Redis service packaged as part of Watson Knowledge Catalog for IBM Cloud Pak for Data could lead to denial of service attacks. The issue is now addressed.

Vulnerability Details

CVEID:   CVE-2020-14147
DESCRIPTION:   Redis is vulnerable to a denial of service, caused by an integer overflow in the getnum function in lua_struct.c in Redis. By sending a specially crafted command with a large number, a remote attacker could exploit this vulnerability to cause a stack-based buffer overflow, leading a denial of service..
CVSS Base score: 5.3
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Watson Knowledge Catalog for IBM Cloud Pak for Data3.0.1


Install wkc-patch- for IBM Cloud Pak for Data.

See for details.

Workarounds and Mitigations

The Redis service is only accessible from within the CPD RHOS cluster and not exposed to the outside. It greatly reduces the risk of possible attacks.

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Change History

03 Aug 2020: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location


[{"Business Unit":{"code":"BU029","label":"Data and AI"},"Product":{"code":"SSHGYS","label":"IBM Cloud Pak for Data"},"Component":"","Platform":[{"code":"PF040","label":"RedHat OpenShift"}],"Version":"2.5","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
03 August 2020