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AUSCERT External Security Bulletin Redistribution
ESB-2018.0551
Security patch for IBM z/TPF
23 February 2018
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AusCERT Security Bulletin Summary
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Product: IBM z/TPF
Publisher: IBM
Operating System: IBM z/OS
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-3737
Reference: ASB-2018.0026
ESB-2017.3144.2
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=swg22013681
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Security Bulletin: z/TPF is affected by the OpenSSL error state security
vulnerability
Document information
Software version: 1.1
Operating system(s): z/TPF
Reference #: 2013681
Modified date: 21 February 2018
Summary
z/TPF has addressed the OpenSSL error state mechanism security bypass
vulnerability.
Vulnerability Details
CVEID: CVE-2017-3737
DESCRIPTION: OpenSSL could allow a remote attacker to bypass security
restrictions, caused by a flaw in the \"error state\" mechanism when directly
calling SSL_read() or SSL_write() for an SSL object after receiving a fatal
error. An attacker could exploit this vulnerability to bypass the decryption or
encryption process and perform unauthorized actions.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
136077 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Affected Products and Versions
z/TPF Enterprise Edition Version 1.1.13 - 1.1.14
Remediation/Fixes
+---------------------------------------------------------------------------+
|Product |VRMF |APAR |Remediation/First Fix |
|---------+------------------+-------------+--------------------------------|
|z/TPF |1.1.13 - 1.1.14 |APAR PJ45174 |Apply the APAR. |
+---------------------------------------------------------------------------+
Workarounds and Mitigations
None.
Important note
IBM strongly suggests that all System z customers be subscribed to the System z
Security Portal to receive the latest critical System z security and integrity
service. If you are not subscribed, see the instructions on the System z
Security web site. Security and integrity APARs and associated fixes will be
posted to this portal. IBM suggests reviewing the CVSS scores and applying all
security or integrity fixes as soon as possible to minimize any potential risk.
Change History
21 February 2018: 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.
Disclaimer
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.
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