Security Bulletin: Multiple vulnerabilities in the IBM Runtime Environments Java Technology Edition, Versions 6 and 7 in TPF Toolkit (CVE-2015-0204, CVE-2015-0478, CVE-2015-0488, CVE-2015-1916, CVE-2015-4000)

Summary

Multiple security vulnerabilities exist in the IBM® Runtime Environments Java™ Technology Edition, Versions 6 and 7 that are shipped in TPF Toolkit.

Vulnerability Details

CVEID: CVE-2015-0204**
DESCRIPTION:** A vulnerability in the OpenSSL ssl3_get_key_exchange function could allow a remote attacker to downgrade the security of certain TLS connections. An OpenSSL client accepts the use of an RSA temporary key in a non-export RSA key exchange ciphersuite. This could allow a remote attacker using man-in-the-middle techniques to facilitate brute-force decryption of TLS/SSL traffic between vulnerable clients and servers. This vulnerability is also known as the FREAK attack.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/99707 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)
**** CVEID: CVE-2015-0478**
DESCRIPTION:** An unspecified vulnerability in Oracle Java SE and JRockit related to the JCE component could allow a remote attacker to obtain sensitive information.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/102339 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVEID: CVE-2015-0488**
DESCRIPTION:** An unspecified vulnerability in Oracle Java SE and Jrockit related to the JSSE 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/102336 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVEID: CVE-2015-1916**
DESCRIPTION:** Server applications which use the IBM Java Secure Socket Extension provider to accept SSL/TLS connections are vulnerable to a denial of service attack due to an unspecified vulnerability.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/101995 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

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

TPF Toolkit 4.0.x and 4.2.x

Remediation/Fixes

Product

| VRMF| APAR| Remediation/First Fix
—|—|—|—
TPF Toolkit| 4.2.x| JR53501|

1. Install the latest version of IBM Installation Manager.

2. Apply Interim Fix 4.2.4 by using IBM Installation Manager.

3. Update the Java installation on your z/OS or Linux on z Systems (or both) systems that the TPF Toolkit connects to. Download the latest version of Java from http://www.ibm.com/developerworks/java/jdk/
   TPF Toolkit| 4.0.x| JR53500|

4. Install the latest version of IBM Installation Manager.

5. Apply Interim Fix 4.0.7 by using IBM Installation Manager.

6. Update the Java installation on your z/OS or Linux on z Systems (or both) systems that the TPF Toolkit connects to. Download the latest version of Java from http://www.ibm.com/developerworks/java/jdk/

Workarounds and Mitigations

None