Security Bulletin: Vulnerability with Diffie-Hellman ciphers may affect IBM WebSphere Service Registry and Repository (CVE-2015-4000)

Summary

The LogJam Attack on Diffie-Hellman ciphers (CVE-2015-4000) may affect some configurations of IBM WebSphere Service Registry and Repository.

Vulnerability Details

CVEID: 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 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 WebSphere Service Registry and Repository versions 8.5.5, 8.5, 8.0, 7.5, 7.0, 6.3

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 .