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AUSCERT External Security Bulletin Redistribution
ESB-2016.1007
Security Bulletin: Vulnerability in OpenSSL affects Sterling
Connect:Enterprise for UNIX (CVE-2016-0800)
21 April 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Sterling Connect:Enterprise for UNIX
Publisher: IBM
Operating System: AIX
HP-UX
Linux variants
Solaris
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-0800 CVE-2015-3196
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=swg21980890
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Security Bulletin: Vulnerability in OpenSSL affects Sterling
Connect:Enterprise for UNIX (CVE-2016-0800).
Document information
More support for:
Sterling Connect:Enterprise for UNIX
Software version:
2.4, 2.5
Operating system(s):
AIX, HP-UX, Linux, Solaris
Reference #:
1980890
Modified date:
2016-04-20
Security Bulletin
Summary
OpenSSL vulnerabilities were disclosed on March 1, 2016 by the OpenSSL
Project. OpenSSL is used by Sterling Connect:Enterprise for UNIX. Sterling
Connect:Enterprise for UNIX has addressed the applicable CVE, the DROWN:
Decrypting RSA with Obsolete and Weakened eNcryption" vulnerability.
Vulnerability Details
CVEID: CVE-2016-0800
DESCRIPTION: OpenSSL could allow a remote attacker to bypass security
restrictions. By using a server that supports SSLv2 and EXPORT cipher suites
as a Bleichenbacher RSA padding oracle, an attacker could exploit this
vulnerability to decrypt TLS sessions between clients and non-vulnerable
servers. This vulnerability is also known as the DROWN attack.
CVSS Base Score: 7.4
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/111139 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:H/A:N)
Affected Products and Versions
Sterling Connect:Enterprise For UNIX (CEU) 2.5.0.0 - 2.5.0.3 iFix 9
Sterling Connect:Enterprise For UNIX (CEU) 2.4.4.0 - 2.4.4.0 iFix 5
Remediation/Fixes
Product VRMF APAR Remediation/First Fix
Sterling Connect:Enterprise For UNIX 2.5.0.3 IT14843 Fix Central
Sterling Connect:Enterprise For UNIX 2.4.4.0 IT14843 Contact Support for this fix to be placed on ECuRep
Note: A fix for CVE-2015-3196 was provided in OpenSSL versions 1.0.1p and
1.0.2d and was previously addressed by Sterling Connect:Enterprise for UNIX.
IBM recommends that the same certificate should ONLY be shared with
identical server configuration and software.
If the same certificate were shared with different server(s) configuration
or software, IBM recommends replacing the different server(s) with unique
certificates to protect against the DROWN exposure.
Workarounds and Mitigations
Customers who do the following are not vulnerable:
1) Run with CE UNIX 2.5.03 iFix 8 Build 201 or higher or CE UNIX 2.4.04
Build 204 or higher
2) Specify the Minimum Security Protocol of TLSv1 in their Security Protocol
Definition file(s)
3) Specify a Cipher Strength of STRONG (or specify only AES_256, AES_128,
and/or 3DES_EDE ciphers)
4) Do not specify the "ALLOW_RC4" environment variable in the startup
script(s).
Get Notified about Future Security Bulletins
Subscribe to My Notifications to be notified of important product support
alerts like this.
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
20 April 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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