Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect IBM Rational ClearQuest (CVE-2015-7575, CVE-2015-4872, CVE-2015-4893, CVE-2015-4803)

Security Bulletin

Summary

There are multiple vulnerabilities in IBM® Runtime Environment Java™ Technology Edition, Versions 6, 7 and 8 that are used by IBM Rational ClearQuest. These issues were disclosed as part of the IBM Java SDK 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. This vulnerability is commonly referred to as “SLOTH”.
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/UI:U/C:H/I:L/A:N)

CVEID: CVE-2015-4872

DESCRIPTION: An unspecified vulnerability 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)

CVEID: CVE-2015-4893

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/107359 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVEID: CVE-2015-4803

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/107358 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

Affected Products and Versions

IBM Rational ClearQuest, versions 7.1.0.x, 7.1.1.x, 7.1.2.x, 8.0.0.x, 8.0.1.x, and 9.0 in the following components:

ClearQuest Web/CQ OSLC server/CM Server component, when configured to use SSL.
ClearQuest Eclipse clients that use Report Designer, run remote reports on servers using secure connections, or use the embedded browser to connect to secure web sites. If you do not use the ClearQuest Eclipse client in this way, then you are not affected.

ClearQuest version	Status
9.0	Affected only by CVE-2015-7575
8.0.1 through 8.0.1.10	Affected
8.0 through 8.0.0.17	Affected
7.1.0.x 7.1.1.x 7.1.2.x (all versions and fix packs)	Affected

Remediation/Fixes

ClearQuest Web/CQ OSLC Server/CM Server Component

For ClearQuest 9.0 and 8.x
These releases use an installation of WebSphere Aplication Server (WAS) separately installed and maintained from the ClearQuest installation. Determine the version of WAS that your deployment is using and follow the instructions at Security Bulletin: Multiple vulnerabilities in IBM® Java SDK affect WebSphere Application Server January 2016 CPU.

For ClearQuest 7.1.x

Customers on extended support contracts should contact customer support.

ClearQuest Eclipse Clients
Apply the relevant fixes as listed in the table below.

Affected Versions	Fixes
9.0	Install Rational ClearQuest Fix Pack 1 (9.0.0.1) for 9.0
8.0.1 through 8.0.1.10	Install Rational ClearQuest Fix Pack 11 (8.0.1.11) for 8.0.1
8.0 through 8.0.0.17	Install Rational ClearQuest Fix Pack 17 (8.0.0.17) for 8.0
7.1.2.x (all fix packs) 7.1.1.x (all fix packs) 7.1.0.x (all fix packs)	Customers on extended support contracts should contact customer support.

For 7.1.x and earlier releases, IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations

If you are unable to take the steps to fix the issue (installing the fix pack), for CVE-2015-7575, the following workaround is available for ClearQuest 9.0. This version of ClearQuest uses Java 7 or Java 8 (depending on platform).
This change is needed on every ClearQuest Eclipse client until the fix pack is installed.

The administrator can address the issue on clients by updating the file /opt/rational/common/JAVA/jre/lib/security/java.security (UNIX) or RationalSDLC\common\JAVA\jre\lib\security\java.security (Windows) 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

Java 6 (used by ClearQuest 8.0 and 8.0.1) requires code changes in the JSSE component in addition to the java.security file modifications, so upgrading to the fix pack is the only solution.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

Off

IBM Java SDK October 2015 Security Bulletin
IBM Java SDK January 2016 Security Bulletin

Change History

* 27 May 2016: Updated to refer to fix packs
* 26 April 2016: Update to include testfix for 9.0.
* 17 March 2016: Originally published

*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.

Internal Use Only

For 7.1.x customers with extended support contacts that include security coverage, contact L3 for support to negotiate a plan to deliver a fixed JRE to the customer.
Note - January 2016 WAS security bulletin has SLOTH fix. October 2015 WAS security bulletin has fixes for other CVEs. For a complete fix, use the January 2016 bulletin, but if customer is on CQ 7.1.x they can get a 'partial' fix with all but the SLOTH fix in the October 2015 bulletin.

Security Bulletin: Multiple vulnerabilities in IBM® Java SDK affect WebSphere Application Server October 2015 CPU

Security Bulletin: Multiple vulnerabilities in IBM® Java SDK affect WebSphere Application Server January 2016 CPU

Test fixes: 8.0.1.10.0008 8.0.0.17.0001 9.0.0001

In 2016A fix packs, the JRE updates will be included and the test fix details here will be replaced with updated fix pack details.

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Tips

Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect IBM Rational ClearQuest (CVE-2015-7575, CVE-2015-4872, CVE-2015-4893, CVE-2015-4803)