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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.1813 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 Publisher: IBM Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Existing Account Resolution: Mitigation CVE Names: CVE-2016-4560 Reference: ESB-2016.1265 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=swg21979292 - --------------------------BEGIN INCLUDED TEXT-------------------- 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 Security Bulletin Document information More support for: IBM Integration Bus Software version: 9.0 Operating system(s): Windows Reference #: 1979292 Modified date: 2016-07-25 Summary 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. Vulnerability Details CVEID: CVE-2016-4560 DESCRIPTION: 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 https://exchange.xforce.ibmcloud.com/vulnerabilities/113016 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 fix packs: IBM Integration Bus V9 for Windows (V9.0.0.0 -> V9.0.0.5) WebSphere Message Broker V8 for Windows (V8.0.0.0 -> V8.0.0.7) IBM Integration Bus Healthcare Pack V3 for Windows (V3.0.0.0 -> V3.0.0.1) WebSphere Message Broker Connectivity Pack for Healthcare V8 for Windows (V8.0.0.0) WebSphere Message Broker Connectivity Pack for Healthcare V7 for Windows (V7.0.0.0 -> V7.0.0.2) IBM Integration Bus Manufacturing Pack V1 for Windows (V1.0.0.0 -> V1.0.0.1) IBM Integration Bus Retail Pack V1 for Windows (V1.0.0.0) Remediation/Fixes None 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 Subscribe to My Notifications to be notified of important product support alerts like this. 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. References Complete CVSS v3 Guide On-line Calculator v3 Related information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog Change History 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. 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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