Security Bulletin: Vulnerability in SSLv3 affects IBM WebSphere Application Server (CVE-2014-3566)

Security Bulletin

Summary

SSLv3 contains a vulnerability that has been referred to as the Padding Oracle On Downgraded Legacy Encryption (POODLE) attack. SSLv3 is enabled by default in IBM WebSphere Application Server. These fixes will disable SSLv3 completely.

Vulnerability Details

CVE ID: CVE-2014-3566
DESCRIPTION: IBM WebSphere Application could allow a remote attacker to obtain sensitive information, caused by a design error when using the SSLv3 protocol. A remote user with the ability to conduct a man-in-the-middle attack could exploit this vulnerability via a POODLE (Padding Oracle On Downgraded Legacy Encryption) attack to decrypt SSL sessions and access the plaintext of encrypted connections.

CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/97013 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

This vulnerability affects all versions and releases of IBM WebSphere Application Server, IBM WebSphere Application Server Full Profile, IBM WebSphere Application Server Liberty Profile and IBM WebSphere Application Server Hypervisor Edition.

Remediation/Fixes

Please refer to the Security Bulletin for IBM HTTP Server to remediate your webserver.

Please note that these fixes will remove SSLv3 completely.

If you have SSL hard coded in your application code, such as SSLContext.getInstance("SSL") then you should install the interim fixes listed below since the current implementation defaults that context to SSLv3. The interim fix is an enhancement in the IBM JDK.

The following table lists some common standard protocol label names for Java 5 and above:

Protocol	Prior to this fix	After this fix
SSL	SSL v3.0	see chart below
SSLv3	SSL v3.0	Connection will fail
TLS	TLS v1.0 (defined in RFC 2246)	TLS v1.0 (defined in RFC 2246)
TLSv1	TLS v1.0 (defined in RFC 2246)	TLS v1.0 (defined in RFC 2246)
TLSv1.1	TLS v1.1 (defined in RFC 4346)	TLS v1.1 (defined in RFC 4346) (not available for version 6.1)
TLSv1.2	TLS v1.2 (defined in RFC 5246)	TLS v1.2 (defined in RFC 5246) (not available for version 6.1)
SSL_TLS	Enables all SSL V3.0 and TLS 1.0 protocols	TLS 1.0
SSL_TLSv2	Enables all SSL V3.0 and TLS 1.0, 1.1 and 1.2 protocols	TLS 1.0, 1.1 and 1.2 protocols (not available for version 6.1 and for version 7.0 only available with fix pack 7.0.0.23 or later.)

The IBM® SDK Java™ Technology Edition that is shipped with IBM WebSphere Application Server will be updated per the chart below, so that SSL Protocol alias label of "SSL" would mean the TLS levels marked.

Java Version	TLS 1.0	TLS 1.1	TLS 1.2
Java 7 Server	x	x	x
Java 7 Client	x
Java 6	x
Java 5	x

The interim fixes will disable SSLv3 by default. If you need to re-enable SSLv3, then there is a new java system property to enable SSLv3 with the protocols listed above. Set the system property either statically or dynamically as described in the product documentation for the IBM SDK Java Technology Edition you are using or in the Setting generic JVM arguments technote Warning: Reenabling this will make you vulnerable to the POODLE attack.

 

   -Dcom.ibm.jsse2.disableSSLv3=false

Second, update the Oracle system property jdk.tls.disabledAlgorithms by removing SSLv3 from the list. This property is defined in the java.security file and any protocols in this list will be disabled. You can modify the setting to remove SSLv3 or add further algorithms with the following syntax:

For the IBM SDK, Java Technology Edition that is used by IBM WebSphere Application Server Full Profile:
For Java 7 or Java 8:

Edit the java.security file and turn off SSLv3 by adding: jdk.tls.disabledAlgorithms=SSLv3

For the IBM SDK, Java Technology Edition or Oracle Java SDK, that is used by IBM WebSphere Application Server Liberty Profile:

Edit the java.security file and turn off SSLv3 by adding: jdk.tls.disabledAlgorithms=SSLv3

This security property has precedence over the IBM system property com.ibm.jsse2.disableSSLv3
Please refer to the knowledge center for more information: http://www-01.ibm.com/support/knowledgecenter/SSYKE2_7.0.0/com.ibm.java.security.component.70.doc/security-component/jsse2Docs/disablesslv3.html?lang=en

For IBM WebSphere Application Server and IBM WebSphere Application Server Hypervisor Edition :

If using Installation Manager 1.7.3.1 or older, please refer to the reference section and upgrade to Installation Manager 1.8 or newer.

Download and apply the interim fix APARs below, for your appropriate release:

For V8.5.0.0 through 8.5.5.3 Full Profile and Liberty Profile IM install:

Apply Interim Fix PI28435 : Will upgrade you to IBM Java SDK Version 7R1 Service Refresh 1 Fix Pack 1 (optional) + APAR IV66110 for change to disable SSLv3 by default
Apply Interim Fix PI28436 : Will upgrade you to IBM Java SDK Version 7 Service Refresh 7 Fix Pack 1 (optional) + APAR IV66110 for change to disable SSLv3 by default
Apply Interim Fix PI28437 : Will upgrade you to IBM Java SDK Version 6R1 Service Refresh 8 Fix Pack 1 (required) + APAR IV66110 for change to disable SSLv3 by default

--OR--

Apply IBM Java SDK shipped with the WebSphere Application Server Fix pack 8.5.5.4 or later.

For 8.0.0.0 through 8.0.0.9:

Apply Interim Fix PI28438 : Will upgrade you to IBM Java SDK Version 6R1 Service Refresh 8 Fix Pack 1 + APAR IV66110 for change to disable SSLv3 by default

--OR--

Apply IBM Java SDK shipped with WebSphere Application Server Fix pack 10 (8.0.0.10) or later.

For V7.0.0.0 through 7.0.0.35:

Apply Interim Fix PI28439 : Will upgrade you to IBM Java SDK Version 6 Service Refresh 16 Fix Pack 1 + APAR IV66110 for change to disable SSLv3 by default

--OR--

Apply IBM Java SDK shipped with WebSphere Application Server Fix pack 37 (7.0.0.37) or later.

For V6.1.0.0 through 6.1.0.47:

Apply Interim Fix PI28796 : Will upgrade you to IBM Java SDK Version 5.0 Service Refresh 16 Fix Pack 7 + APAR IV66111 for change to disable SSLv3 by default.

For IBM WebSphere Application Server Liberty Profile not using IM install
Please refer to the vendor that supplies you SDK. For users of the IBM SDK, Java Technology Edition please refer to this security bulletin: IBM SDK, Java Technology Edition fixes to mitigate against the POODLE security vulnerability

For IBM WebSphere Application Server for i5/OS operating systems:

The IBM Developer Kit for Java is prerequisite software for WebSphere Application Server for IBM i. Please refer to Java on IBM i for updates on when these fixes will be available.

Workarounds and Mitigations

None. Please apply Interim Fix or Fix Packs.

IBM recommends that you review your entire environment to identify other areas that enable SSLv3 protocol and take appropriate mitigation (such as disabling SSLv3) and remediation actions.

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Important Note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

References

Complete CVSS v2 Guide
On-line Calculator v2

Off

Security Bulletin for IBM HTTP Server

Product updates not found when using IBM Installation Manager 1.7.3.1 or older

IBM Installation Manager 1.7.3.1 or older cannot connect to HTTPS servers that have SSL security protocol disabled

HTTPS advisor fails when SSLv3 is disabled on backend servers

IBM SDK, Java Technology Edition fixes to mitigate against the POODLE security vulnerability

WebSphere and Disablement of SSLV3 Blog

Change History

15 October 2014: original document published
20 October 2014: fix quote in wrong location for wsadmin command
22 October 2014: clarified SSL_TLS versus TLS
31 October 2014: added ifixes for remediation
6 November 2014: added link to version 6.1 ifix
20 November 2014: bolded note about when to restart the server
2 December 2014: added link in reference section
2 February 2015: updated APAR number typo
5 March 2015: updated Mitigation section
30 March 2015: added link to Setting JVM properties
30 March 2015: added links for Liberty profile
6 May 2015: updated protocol table, added Warnings
26 October 2015: clarified java.security updates

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Tips

Security Bulletin: Vulnerability in SSLv3 affects IBM WebSphere Application Server (CVE-2014-3566)