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Security Bulletin: Vulnerability CVE-2019-1543 in OpenSSL affects IBM i

Security Bulletin


OpenSSL is used by IBM i. IBM i has addressed the applicable CVE.

Vulnerability Details

CVEID: CVE-2019-1543
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by an error in the ChaCha20-Poly1305 AEAD cipher. By sending a message encrypted using a reused overly long nonce, an attacker could exploit this vulnerability to conduct serious confidentiality and integrity attacks.
CVSS Base Score: 4.8
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

Releases 7.1, 7.2, 7.3 and 7.4 of IBM i are affected.


The issue can be fixed by applying a PTF to IBM i.  Releases 7.1, 7.2, 7.3 and 7.4 of IBM i are supported and will be fixed. 

The IBM i PTF numbers are:
Release 7.1 – SI70818
Release 7.2, 7.3 & 7.4 – SI70819

Important note: IBM recommends that all users running unsupported versions of affected products upgrade to supported and fixed version of affected products.

Workarounds and Mitigations


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Change History

28 August 2019: Original Version Published

*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:
18 December 2019