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Security Bulletin: Vulnerability in Apache Cassandra affecting Watson Knowledge Catalog for IBM Cloud Pak for Data

Security Bulletin


There is a man-in-the-middle attack vulnerability in the Apache Cassandra service packaged as part of Watson Knowledge Catalog for IBM Cloud Pak for Data. The issue is now addressed.

Vulnerability Details

CVEID:   CVE-2020-13946
DESCRIPTION:   Apache Cassandra is vulnerable to a man-in-the-middle attack, caused by a RMI rebind vulnerability. By manipulating the RMI registry, an attacker could exploit this vulnerability to launch a man-in-the-middle attack and obtain user names and passwords used to access the JMX interface.
CVSS Base score: 6.2
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
Watson Knowledge Catalog for IBM Cloud Pak for Data3.0
Watson Knowledge Catalog for IBM Cloud Pak for Data2.5


Watson Knowledge Catalog for IBM Cloud Pak for Data 2.5: install WKC patch 11:

Watson Knowledge Catalog for IBM Cloud Pak for Data 3.0: install WKC patch 6:

Workarounds and Mitigations

The Apache Cassandra service is not exposed outside of the OpenShift cluster hosting Cloud Pak for Data which is limiting the ability to exploit this vulnerability.

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Change History

13 Jan 2021: 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":""}]

Document Information

Modified date:
13 January 2021