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AUSCERT External Security Bulletin Redistribution
ESB-2015.1128
Security Bulletin: Vulnerability in RC4 stream cipher
affects Rational DOORS Web Access (CVE-2015-2808)
24 April 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Rational DOORS Web Access
Publisher: IBM
Operating System: Linux variants
Solaris
Windows
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-2808
Reference: ESB-2015.0962
ESB-2015.0961
ESB-2015.0960
ESB-2015.0958
ESB-2015.0956
ESB-2015.0955
ESB-2015.0954
ESB-2015.0953
ESB-2015.0950.2
ESB-2015.0949.2
ESB-2015.0948.2
ESB-2015.0947.2
ESB-2015.0946.2
ESB-2015.0944.2
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21882846
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Security Bulletin: Vulnerability in RC4 stream cipher affects Rational DOORS
Web Access (CVE-2015-2808)
Security Bulletin
Document information
More support for:
Rational DOORS Web Access
General Information
Software version:
1.4, 1.4.0.1, 1.4.0.2, 1.4.0.3, 1.4.0.4, 1.4.0.5, 1.5, 1.5.0.1, 9.5, 9.5.0.1,
9.5.1, 9.5.1.1, 9.5.2, 9.5.2.1, 9.6, 9.6.0.1, 9.6.1, 9.6.1.1
Operating system(s):
Linux, Solaris, Windows
Reference #:
1882846
Modified date:
2015-04-23
Summary
The RC4 Bar Mitzvah Attack for SSL/TLS affects IBM Rational DOORS Web Access.
Vulnerability Details
Rational DOORS Web Access is affected by the following vulnerabilities
disclosed in and corrected by the JRE critical patch updates:
CVEID: CVE-2015-2808
DESCRIPTION: The RC4 algorithm, as used in the TLS protocol and SSL protocol,
could allow a remote attacker to obtain sensitive information. An attacker
could exploit this vulnerability to remotely expose account credentials
without requiring an active man-in-the-middle session. Successful exploitation
could allow an attacker to retrieve credit card data or other sensitive
information. This vulnerability is commonly referred to as "Bar Mitzvah
Attack".
CVSS Base Score: 5
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/101851 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Affected Products and Versions
Rational DOORS Web Access version 9.6.1.x, 9.6.0.x, 9.5.2.x, 9.5.1.x, 9.5.0.x,
1.5.0.x, 1.4.0.x
Remediation/Fixes
The only solution is to upgrade the JRE. You can upgrade the JRE after
installing Rational DOORS Web Access.
To obtain the updated version of the IBM JRE, contact IBM Support. Support can
help identify the latest JRE that is compatible with your operating system and
platform. Publicly available versions of the Oracle JRE are not supported with
Rational DOORS Web Access.
The following table presents Rational DOORS Web Access versions and the
compatible versions of IBM JRE.
Rational DOORS Web Access IBM JRE
1.4.0.x 6.0.16.3
1.5.0.x 6.0.16.3
9.5.0.x 6.0.16.3
9.5.1.x 6.0.16.3
9.5.2.x 6.0.16.3
9.6.0.x See "Workarounds and Mitigations"
9.6.1.x See "Workarounds and Mitigations"
To install the updated JRE in Rational DOORS Web Access, review the help
topic:
Upgrading the Rational DOORS Web Access JRE
You should verify applying this fix does not cause any compatibility issues.
The fix disables RC4 stream cipher by default. If you change this setting you
will expose yourself to the attack described above. IBM recommends that you
review your entire environment to identify other areas where you have enabled
the RC4 stream cipher and take appropriate mitigation and remediation actions.
For versions for Rational DOORS Web Access that are earlier than version
1.4.0.x, IBM recommends upgrading to a fixed, supported
version/release/platform of the product.
Workarounds and Mitigations
For Rational DOORS Web Access versions 1.4.0.x - 9.5.2.x, upgrade the JRE, as
described in "Remediations/Fixes".
For versions 9.6.0.x - 9.6.1.x, disable the RC4 cipher suite in your Java 7
installation:
1. Open the following file in a text editor: jre/lib/security/java.security
2. Add RC4 to jdk.tls.disabledAlgorithms
For example:
jdk.tls.disabledAlgorithms=SSLv3, RC4, D5, SHA1, RSA keySize < 1024
The minimum entries that are required for the POODLE and Bar Mitzvah
vulnerabilities are the following:
jdk.tls.disabledAlgorithms=SSLv3, RC4
Users who enabled SP800-131a for Rational DOORS Web Access are not affected.
You should verify that applying this configuration change does not cause any
compatibility issues. Not disabling the RC4 stream cipher will expose yourself
to the attack described above. IBM recommends that you review your entire
environment to identify other areas where you have enabled the RC4 stream
cipher and take appropriate mitigation and remediation actions.
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alerts like this.
References
Complete CVSS Guide
On-line Calculator V2
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
*23 April 2015: Original copy 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
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.
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