Author: Melodie Foster

Date: 24th February 2021


The flaw was located in IBM’s Integration Designer which delivers tools for visually constructing services. Big Blue’s Integration Designer toolset, included in the Integration Designer, contained a buffer-overflow error which could lead to remote code execution.

IBM’s security advisor said about the flaw, “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.” However, IBM have not provided further information about the level of privileges an attacker would need.

IBM utilise a Java Native Interface which is a framework that enables Java code running in a Java virtual machine to be able to call native applications written in other languages. The flaw exists when the virtual machine or Java Native Interface converts characters from UTF-8 to platform encoding.

The flaw has a CVSS score of 9.8 out of 10 which means it is critical. IBM have issued patches to the four vulnerable versions of Integration Designer: 8.5.7,, and

Another unspecified vulnerability was also patched in the Integration Designer but iBM said about that flaw that it had “no confidentiality impact, low integrity impact and no availability impact.”[1]



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