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AUSCERT External Security Bulletin Redistribution
Security Bulletin: IBM WebSphere Installer used by WebSphere Message
Broker, IBM Integration Bus, IBM Integration Bus Healthcare Pack, IBM
Integration Bus Manufacturing Pack, and IBM Integration Bus Retail Pack is
susceptible to DLL-planting vulnerability
26 July 2016
AusCERT Security Bulletin Summary
Product: IBM Integration Bus products
IBM WebSphere Message Broker
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
CVE Names: CVE-2016-4560
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Security Bulletin: IBM WebSphere Installer used by WebSphere Message Broker,
IBM Integration Bus, IBM Integration Bus Healthcare Pack, IBM Integration Bus
Manufacturing Pack, and IBM Integration Bus Retail Pack is susceptible to
More support for:
IBM Integration Bus
The Windows graphical user interface installer (setup.exe) used by WebSphere
Message Broker, IBM Integration Bus, IBM Integration Bus Healthcare Pack, IBM
Integration Bus Manufacturing Pack, and IBM Integration Bus Retail Pack, is
susceptible to a DLL-planting vulnerability, where a malicious DLL that is
present in the Windows search path could be loaded by the operating system in
place of the genuine file.
Flexera InstallAnywhere could allow a local attacker to gain elevated
privileges on the system, caused by an untrusted search path. An attacker
could exploit this vulnerability, by using a Trojan horse DLL in the current
working directory of a setup-launcher executable file, to gain elevated
privileges on the system.
CVSS Base Score: 7.8
CVSS Temporal Score: See
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
The vulnerability affects the executable (.exe file extension) installers and
IBM Integration Bus V9 for Windows (V22.214.171.124 -> V126.96.36.199)
WebSphere Message Broker V8 for Windows (V188.8.131.52 -> V184.108.40.206)
IBM Integration Bus Healthcare Pack V3 for Windows (V220.127.116.11 -> V18.104.22.168)
WebSphere Message Broker Connectivity Pack for Healthcare V8 for Windows
WebSphere Message Broker Connectivity Pack for Healthcare V7 for Windows
(V22.214.171.124 -> V126.96.36.199)
IBM Integration Bus Manufacturing Pack V1 for Windows (V188.8.131.52 -> V184.108.40.206)
IBM Integration Bus Retail Pack V1 for Windows (V220.127.116.11)
Workarounds and Mitigations
Complete these steps to work around the InstallAnywhere vulnerability.
To avoid the untrusted search path vulnerability, where users could gain
increased privileges, complete the following steps:
1) Create a new, empty, secure directory in a temporary location.
The directory must not exist previously and only the administrator should
have write access to it.
2) Either copy or move the installer executable, or unpack the installation
zip file into the new, empty folder created in Step 1.
3) Ensure that there are no DLL files in this directory.
4) Launch the installer executable from its new location.
Get Notified about Future Security Bulletins
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z Security Portal to receive the latest critical System z security and
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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.
Complete CVSS v3 Guide
On-line Calculator v3
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
22 -Jul-2016 - 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.
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