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Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect Rational Directory Server (Tivoli) & Rational Directory Administrator

Security Bulletin


Summary

There are multiple vulnerabilities in IBM® Runtime Environment Java™ Version 7 and Version 8 used by Rational Directory Server (Tivoli) and Rational Directory Administrator. These issues were disclosed as part of the IBM Java SDK updates in October 2019. Upgrade the JRE in order to resolve these issues.

Vulnerability Details

CVEID:   CVE-2019-2964
DESCRIPTION:   An unspecified vulnerability in Java SE related to the Concurrency component could allow an unauthenticated attacker to cause a denial of service resulting in a low availability impact using unknown attack vectors.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/169270 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Affected Product(s) Version(s)
RDS 5.2.1 iFix 13 and earlier
RDA 6.0.0.2 iFix 06 and earlier

Remediation/Fixes

1. Download one of the following IBM JRE versions that contain the fixes for these vulnerabilities:

2. After downloading a fixed IBM JRE version, refer the following technote for JRE upgrade instructions:    

NOTE: 
To improve the robustness of LDAPS (secure LDAP over TLS) connections, endpoint identification algorithms have been enabled by default. There may be situations where some applications that were previously able to successfully connect to an LDAPS server may no longer be able to do so.
With this LDAP update, LDAP is asking JSSE to validate the LDAP server's certificate to ensure it is compliant with hostname verification.  With this change, if the server's certificate is not compliant, then exception will be thrown.  In the past, LDAP did not request JSSE to perform hostname verification and a non-compliant server certificate would not have had caused an issue.
In order to resolve the issue, Regenerate the RDS server certificate(tdsserverkey.kdb) so that the certificate's subject name or certificate's subject alternate name matches the RDS server hostname, by following instructions from technote:
 
How can I generate my own 'tdsserverkey.kdb' keystore for TLSv12 communication and use it in a IBM Rational Directory Server (Tivoli) deployment?
 
After regenerating the RDS Server certificate matching with the RDS Server Hostname, use FQDN's wherever applicable.
E.g. : RDA Login Screen, Creating RDS Partition and DOORS to RDS Connection.
 
(If you have already regenerated the RDS Server certificate by following above technote, while upgrading to IBM JRE versions 7.1.4.30 or later or 8.0.5.20 or later, then no need to follow the technote again)
For versions of Rational Directory Server that are earlier than version 5.2.1, and Rational Directory Administrator versions earlier than 6.0.0.2, IBM recommends upgrading to a fixed, supported version/release/platform of the product.
If you run your own Java code using the IBM Java Runtime delivered with this product, you should evaluate your code to determine whether additional Java vulnerabilities are applicable to your code. For a complete list of vulnerabilities, refer to the "IBM Java SDK Security Bulletin", located in the References section for more information.

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

IBM Java SDK Security Bulletin

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

16 Dec 2019: Initial Publication

*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.

Document Location

Worldwide

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Document Information

Modified date:
16 December 2019

UID

ibm11134897

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