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Security Bulletin: Vulnerabilities in IBM Java Runtime affect IBM Integration Bus and IBM App Connect Enterpise v11, v12 (CVE-2020-27221)

Security Bulletin


Vulnerabilities in IBM® SDK Java™ Technology ,used by IBM Integration Bus & IBM App Connect Enterprise v11, v12. These issues were disclosed as part of the IBM Java SDK updates in January 2021.

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

IBM App Connect Enterprise V11 , V11.0.0.0 - V11.0.0.13

IBM Integration Bus V10.0.0.0 - V10.0.0.23

IBM App Connect Enterprise V12


Remediation / Fix
IBM App Connect Enterprise V12V12.0.1.0IT36290
Interim fix (for APAR IT36290 ) available here on IBM Fix Central
IBM App Connect Enterprise V11V11.0.0.0 - V11.0.0.13IT36290
Interim fix (for APAR IT36290 ) available here on IBM Fix Central
IBM Integration BusV10.0.0.0 - V10.0.0.24IT36290
The APAR is available in fixpack

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

19 Aug 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":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSDR5J","label":"IBM App Connect Enterprise"},"Component":"","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF016","label":"Linux"},{"code":"PF033","label":"Windows"}],"Version":"-","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
19 August 2021