Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect IBM Sterling Connect:Direct Browser User Interface (CVE-2015-7575, CVE-2016-0475, CVE-2015-4872)

Summary

There are multiple vulnerabilities in IBM® Runtime Environment Java™ Technology Edition, Version 7.0 that is used by IBM Sterling Connect:Direct Browser User Interface. These issues were disclosed as part of the IBM Java Runtime updates in October 2015 and January 2016 and include the vulnerability commonly referred to as “SLOTH”.

Vulnerability Details

CVEID:CVE-2015-7575**
DESCRIPTION: *The TLS protocol could allow weaker than expected security caused by a collision attack when using the MD5 hash function for signing a ServerKeyExchange message during a TLS handshake. An attacker could exploit this vulnerability using man-in-the-middle techniques to impersonate a TLS server and obtain credentials.
CVSS Base Score: 7.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109415 for the current score
CVSS Environmental Score: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N)

CVEID: CVE-2016-0475**
DESCRIPTION: *An unspecified vulnerability in Oracle Java SE Java SE Embedded and Jrockit related to the Libraries component has partial confidentiality impact, partial integrity impact, and no availability impact.
CVSS Base Score: 5.8
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109946 for the current score
CVSS Environmental Score: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:N)

CVEID: CVE-2015-4872 DESCRIPTION: An unspecified vulnerability in Oracle Java SE and JRockit related to the Security component has no confidentiality impact, partial integrity impact, and no availability impact.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107361 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N)

Affected Products and Versions

IBM Sterling Connect:Direct Browser User Interface 1.5.0 through 1.5.0.2 iFix 15
IBM Sterling Connect:Direct Browser User Interface 1.4.0 through 1.4.11.0 iFix 4

Remediation/Fixes

Product

|

VRMF

|

iFix

| Remediation/First Fix
—|—|—|—
IBM Sterling Connect:Direct Browser User Interface|

1.5.0.2

|

iFix 16

| Fix Central
IBM Sterling Connect:Direct Browser User Interface|

1.4.11.0

|

iFix 5

| Contact Support and request the fix package be published for you on the ECuRep server.

Workarounds and Mitigations

For CVE-2015-7575 (SLOTH MD5):

Users of Java 7 and later can address the issue by updating the ./jre/lib/security/java.security file as follows (both steps are required):

• Add MD5 to the jdk.certpath.disabledAlgorithms property -For example, jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024, MD5 * Add MD5withRSA to the jdk.tls.disabledAlgorithms property - For example, jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize < 768,MD5withRSA

Java 6 requires code changes in the JSSE component in addition to the java.security file modifications, so upgrading the JRE is the only solution.