Security Bulletin: Vulnerability in Diffie-Hellman ciphers affects IBM XIV Management Tools (CVE-2015-4000)

Summary

The Logjam Attack on TLS connections using the Diffie-Hellman (DH) key exchange protocol affects XIV Management Tools.

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

• All versions of XIV Management Tools prior to 4.6.0.1
• All versions of IBM Hyper-Scale Manager Prior to 1.7.0.1

Remediation/Fixes

Users of previous versions should upgrade to XIV Management Tools 4.6.0.1 / IBM Hyper-Scale Manager 1.7.0.1.

Users of the IBM Hyper-Scale Manager Appliance should apply the hotfixes to XIV Management Tools 4.5.0.2 / IBM Hyper-Scale Manager 1.6.0.2, since the IBM Hyper-Scale Manager is not available as an appliance in 1.7.0.1.