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AUSCERT External Security Bulletin Redistribution
ESB-2016.1852
Security Bulletin: Java DLL planting vulnerability affects
IBM Sterling Secure Proxy (CVE-2016-2542)
29 July 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Sterling Secure Proxy
Publisher: IBM
Operating System: Windows
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2016-2542
Reference: ESB-2016.0805
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=swg21987147
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Security Bulletin: Java DLL planting vulnerability affects IBM Sterling
Secure Proxy (CVE-2016-2542)
Security Bulletin
Document information
More support for:
Sterling Secure Proxy
Software version:
3.4.2, 3.4.3
Operating system(s):
Windows
Reference #:
1987147
Modified date:
2016-07-28
Summary
Flexera InstallAnywhere generates installation executables which are
vulnerable to a DLL-planting vulnerability during installs on Windows
systems. InstallAnywhere is used by IBM Sterling Secure Proxy.
Vulnerability Details
CVEID:
CVE-2016-2542
DESCRIPTION:
Flexera InstallShield could allow a local attacker to gain elevated
privileges on the system, caused by an untrusted search path. An attacker
could exploit this vulnerability 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/110914
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
IBM Sterling Secure Proxy 3.4.3 GA
IBM Sterling Secure Proxy 3.4.2 through 3.4.2.0 iFix 7
Remediation/Fixes
Use install images from the following iFixes to remediate the vulnerability
on Windows systems. UNIX systems are not susceptible to this vulnerability.
Product VRMF iFix Remediation/First Fix
IBM Sterling Secure Proxy 3.4.3.0 iFix 1 Fix Central
IBM Sterling Secure Proxy 3.4.2.0 iFix 8 Fix Central
Workarounds and Mitigations
To install a previous vulnerable version of IBM Sterling Secure Proxy on
Microsoft Windows, follow these steps to work around the vulnerability.
1. As an administrator, create a new secure directory. The directory must not
have existed before and only the administrator should have write permission
to it. The directory must not be a subdirectory of the Downloads directory.
2. Unzip or copy the files from your installation media into this new
directory.
3. Ensure there are no DLL files in this directory.
4. Run the
*.Win_X64.exe
executable(s) from this directory to install the product. Proceed with the
installation as normal.
Get Notified about Future Security Bulletins
Subscribe to
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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
Acknowledgement
None.
Change History
28 July 2016: Updated with workaround for installing previous vulnerable
versions.
24 July 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.
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