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Security Bulletin: OpenSSL and OpenVPN vulnerabilities affect IBM Rational Team Concert (CVE-2016-2183, CVE-2016-6329)

Security Bulletin


Summary

OpenSSL and OpenVPN vulnerabilities affect IBM Rational Team Concert. OpenSSL and OpenVPN are used by Rational BuildForge Agent shipped with IBM Rational Team Concert.

Vulnerability Details

CVEID: CVE-2016-2183
DESCRIPTION:
OpenSSL could allow a remote attacker to obtain sensitive information, caused by an error in the in the Triple-DES on 64-bit block cipher, used as a part of the SSL/TLS protocol. By capturing large amounts of encrypted traffic between the SSL/TLS server and the client, a remote attacker able to conduct a man-in-the-middle attack could exploit this vulnerability to recover the plaintext data and obtain sensitive information. This vulnerability is known as the SWEET32 Birthday attack.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/116337 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2016-6329
DESCRIPTION:
OpenVPN could allow a remote attacker to obtain sensitive information, caused by an error in the in the Triple-DES on 64-bit block cipher, used as a part of the SSL/TLS protocol. By capturing large amounts of encrypted traffic between the SSL/TLS server and the client, a remote attacker able to conduct a man-in-the-middle attack could exploit this vulnerability to recover the plaintext data and obtain sensitive information. This vulnerability is known as the SWEET32 Birthday attack.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/116341 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

Rational Team Concert 4.0 - 4.0.7
Rational Team Concert 5.0 - 5.0.2
Rational Team Concert 6.0 - 6.0.2

Remediation/Fixes

The remediation for this Security issues is to disable triple-DES.

In the Build Forge Agent when triple-DES is enabled, it also enables SSL.

In order to disable triple-DES follow steps below:

      1. Open bfagent.conf file, the file can be located at:
         Windows default: C:\Program Files\IBM\Build Forge\Agent\BFAgent.conf
         UNIX and Linux default: /etc/bfagent.conf

      2. Add the following line in bfagent.conf after the line of "SSLProtocol":
      SSLCipherSuite ALL:!ADH:!aNULL:!eNULL:!LOW:!EXP:!RC4:!DES-CBC3:+HIGH:+MEDIUM


      Note: if the build forge agent is not using SSL, comment out this line.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

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

Related information

Change History

Initial Publication: 07 October 2016

*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

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document information

More support for: Rational Team Concert
General Information

Software version: 4.0, 4.0.0.1, 4.0.0.2, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7, 5.0, 5.0.1, 5.0.2, 6.0, 6.0.1, 6.0.2

Operating system(s): AIX, IBM i, Linux, OS X, Solaris, Windows

Reference #: 1991482

Modified date: 07 October 2016


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