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Security Bulletin: Vulnerability in IBM SDK Java affects IBM Cloud Pak System (CVE-2020-27221)

Security Bulletin


Vulnerability in IBM SDK Java affects IBM Cloud Pak System. OS Image for Red Enterprise Linux shipped with Cloud Pak System addressed this vulnerability.

Vulnerability Details

CVEID:   CVE-2020-27221
DESCRIPTION:   Eclipse OpenJ9 is vulnerable to a stack-based buffer overflow when the virtual machine or JNI natives are converting from UTF-8 characters to platform encoding. By sending an overly long string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.
CVSS Base score: 9.8
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Cloud Pak System2.3


For unsupported version/release/platform IBM recommends upgrading to a fixed, supported version of the product.

This Security Bulletin applies to Cloud Pak System Software, IBM OS Image for Red Hat Linux Systems (RHEL 7.9)  updates to IBM® SDK Java™ Technology Edition, V8.0.6.25.

for IBM Cloud Pak System V2.3.0 through V2.3.3.3, upgrade to V2.3.3.3 Interim Fix 1 or later at Fix Central

Notice IBM Cloud Pak System v2.3.3.4 has upgraded Java to IBM® SDK Java™ Technology Edition V8.0.6.36.

Information on upgrading at :

Workarounds and Mitigations


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Change History

29 Sep 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":"BU025","label":"IBM Cloud and Cognitive Software"},"Product":{"code":"SSFQWQ","label":"IBM Cloud Pak System"},"Component":"","Platform":[{"code":"PF016","label":"Linux"}],"Version":"2.3","Edition":""}]

Document Information

Modified date:
26 November 2021