Security Bulletin: Multiple vulnerabilities in IBM Java SDK affect IBM Rational Application Developer for WebSphere Software (CVE-2015-7575, CVE-2016-0466, CVE-2016-0475, CVE-2016-0448)

Summary

There are multiple vulnerabilities in IBM® SDK Java™ Technology Edition, Versions 7 and 8 that are used by IBM Rational Application Developer for WebSphere Software. These issues were disclosed as part of the IBM Java SDK updates in January 2016 and includes 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-2016-0466 **
DESCRIPTION:** An unspecified vulnerability related to the JAXP component could allow a remote attacker to cause a denial of service.

CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109948 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVEID: CVE-2016-0475 **
DESCRIPTION:** An unspecified vulnerability 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-2016-0448 **
DESCRIPTION:** An unspecified vulnerability related to the JMX component could allow a remote attacker to obtain sensitive information.

CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109949 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:S/C:P/I:N/A:N)

Affected Products and Versions

Rational Application Developer 9.5 and earlier

Remediation/Fixes

Update the IBM SDK, Java Technology Edition of the product to address this vulnerability:

• For all versions, IBM SDK Java Technology Edition Critical Patch Update - January 2016.

• For the WebSphere Application Server 7.0 Test Environment, apply WebSphere Application Server 7.0 Test Environment Extension Fix Pack 39u1 (7.0.0.39u1)

• For WebSphere Application Server versions 8.0 and 8.5, see Security Bulletin: Multiple vulnerabilities in IBM® Java SDK affect WebSphere Application Server January 2016 CPU (CVE-2016-0475, CVE-2016-0466, CVE-2015-7575, CVE-2016-0448)
  Rational Agent Controller| 7.0 through to 9.5| PI56998|

• Apply Rational Agent Controller Fixpack 1 Interim Fix 1 (9.5.0.1 iFix1) for 9.5.0
  Rational Build Utility| 8.5 through to 9.5| PI56998|

• For use on Windows or Linux: apply IBM SDK Java Technology Edition Critical Patch Update - January 2016

• For use on System z:

  • Version 8.5, 9.0 and 9.1: Apply the latest Java Technology Edition, V7.0.0.
  • Version 9.5: Apply the latest Java Technology Edition, V8.0.0.

Workarounds and Mitigations

For CVE-2015-7575:

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 - e.g. jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024, MD5

· Add MD5withRSA to the jdk.tls.disabledAlgorithms property - e.g. jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize < 768, MD5withRSA