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Security Bulletin: Vulnerabiliity in IBM Java shipped with IBM Transformation Extender Advanced (CVE-2018-12547)

Security Bulletin


A widely used function in the OpenJ9 JVM is vulnerable to buffer overlows. Multiple Java Runtime components use the vulnerable code, so the issue can manifest in a number of different ways. The fix ensures that the buffer cannot overflow. The vulnerability has been addressed.

Vulnerability Details

CVEID:   CVE-2018-12547
DESCRIPTION:   In Eclipse OpenJ9, prior to the 0.12.0 release, the jio_snprintf() and jio_vsnprintf() native methods ignored the length parameter. This affects existing APIs that called the functions to exceed the allocated buffer. This functions were not directly callable by non-native user code.
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)
Transformation Extender Advanced (ITXA)9.0


Upgrade to ITXA version or higher from Passport Advantage.

Workarounds and Mitigations

Customer may manually upgrade their installation to the latest version of IBM Java.

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Change History

20 Nov 2019: 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


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Document Information

Modified date:
15 May 2020