ESB-2018.2742 - [Win][Linux][IBM i][HP-UX][Solaris][AIX] IBM WebSphere Application Server: Multiple vulnerabilities 2018-09-14

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2742
            Security Bulletin: Weaker than expected security in
               WebSphere Application Server (CVE-2018-1719)
                             14 September 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM WebSphere Application Server
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   IBM i
                   Linux variants
                   Solaris
                   Windows
                   z/OS
Impact/Access:     Provide Misleading Information -- Remote with User Interaction
                   Reduced Security               -- Remote/Unauthenticated      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1719  

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=ibm10718837

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Security Bulletin: Weaker than expected security in WebSphere Application
Server (CVE-2018-1719)

Document information

More support for: WebSphere Application Server

Software version: 9.0 8.5

Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS

Software edition: Advanced, Base, Developer, Enterprise, Express, Network
Deployment

Reference #: 0718837

Modified date: 12 September 2018

Summary

There is a potential for weaker than expected security in WebSphere
Application Server which could result in TLS downgrade under certain
conditions. This only applies if FIPS is enabled and the keystores/truststores
are configured by the JVM property com.ibm.ssl.protocol.

Vulnerability Details

CVEID: CVE-2018-1719
DESCRIPTION: IBM WebSphere Application Server could provide weaker than
expected security under certain conditions. This could result in a downgrade
of TLS protocol. A remote attacker could exploit this vulnerability to perform
man-in-the-middle attacks.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
147292 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

This vulnerability affects the following versions and releases of IBM
WebSphere Application Server:

  o Version 9.0
  o Version 8.5

Remediation/Fixes

The recommended solution is to apply the interim fix, Fix Pack or PTF
containing APAR PI98768 for each named product as soon as practical.

For WebSphere Application Server traditional and WebSphere Application Server
Hypervisor Edition:
For V9.0.0.0 through 9.0.0.8:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PI98768
- --OR--
. Apply Fix Pack 9.0.0.9 or later (targeted availability 3Q2018).

For V8.5.0.0 through 8.5.5.14:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PI98768

- --OR--
. Apply Fix Pack 8.5.5.15 or later (targeted availability 1Q2019).

Change History

12 September 2018: original document 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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