IBM Security Bulletin: Vulnerability with Diffie-Hellman ciphers may affect IBM SOA Policy Gateway Pattern for Red Hat Enterprise Linux Server 2.5 (CVE-2015-4000) - United States  SECURITY BULLETIN

SUMMARY
 The LogJam Attack on Diffie-Hellman ciphers (CVE-2015-4000) may affect some configurations of IBM SOA Policy Gateway Pattern for Red Hat Enterprise Linux Server 2.5. 

VULNERABILITY DETAILS
CVEID: CVE-2015-4000 [http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4000]
DESCRIPTION: The TLS protocol could allow a remote attacker to obtain sensitive information, caused by the failure to properly convey a DHE_EXPORT ciphersuite choice. An attacker could exploit this vulnerability using man-in-the-middle techniques to force a downgrade to 512-bit export-grade cipher. Successful exploitation could allow an attacker to recover the session key as well as modify the contents of the traffic. This vulnerability is commonly referred to as "Logjam".
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/103294 [https://exchange.xforce.ibmcloud.com/vulnerabilities/103294] for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N) 

AFFECTED PRODUCTS AND VERSIONS
IBM SOA Policy Gateway Pattern for Red Hat Enterprise Linux Server version 2.5

REMEDIATION/FIXES
None

WORKAROUNDS AND MITIGATIONS
Customers should follow the mitigation advice contained in the WebSphere Application Server security bulletin, located at http://www.ibm.com/support/docview.wss?uid=swg21957980 [http://www-01.ibm.com/support/docview.wss?uid=swg21957980] .

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REFERENCES
Complete CVSS v2 Guide [http://www.first.org/cvss/v2/guide] 
On-line Calculator v2 [http://nvd.nist.gov/CVSS-v2-Calculator] RELATED INFORMATION
IBM Secure Engineering Web Portal [http://www.ibm.com/security/secure-engineering/bulletins.html] 
IBM Product Security Incident Response Blog [http://www.ibm.com/blogs/PSIRT] ACKNOWLEDGEMENT
Reported to IBM by The WeakDH team at https://weakdh.org [https://weakdh.org] 

CHANGE HISTORY
 08 June 2015: 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.

Question: Help with Security Bulletin: Vulnerability with Diffie-Hellman ciphers may affect IBM SOA Policy Gateway Pattern for Red Hat Enterprise Linux Server 2.5 (CVE-2015-4000) I need to understand details regarding Security Bulletin: Vulnerability with Diffie-Hellman ciphers may affect IBM SOA Policy Gateway Pattern for Red Hat Enterprise Linux Server 2.5 (CVE-2015-4000). This vulnerability is commonly referred to as "Logjam". Where can I find this information? 

Answer: CVEID: CVE-2015-4000 [http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4000]
DESCRIPTION: The TLS protocol could allow a remote attacker to obtain sensitive information, caused by the failure to properly convey a DHE_EXPORT ciphersuite choice. An attacker could exploit this vulnerability using man-in-the-middle techniques to force a downgrade to 512-bit export-grade cipher. Successful exploitation could allow an attacker to recover the session key as well as modify the contents of the traffic. This vulnerability is commonly referred to as "Logjam".
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/103294 [https://exchange.xforce.ibmcloud.com/vulnerabilities/103294] for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)