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Security Bulletin: Vulnerability in RC4 stream cipher affects Rational DOORS Web Access (CVE-2015-2808)

Security Bulletin


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 AccessIBM JRE
1.4.0.x6.0.16.3
1.5.0.x6.0.16.3
9.5.0.x6.0.16.3
9.5.1.x6.0.16.3
9.5.2.x6.0.16.3
9.6.0.xSee "Workarounds and Mitigations"
9.6.1.xSee "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.

Get Notified about Future Security Bulletins

References

Off

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

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

Internal Use Only

See the Linux and Windows JREs on Fix Portal. Note: 32-bit pre-9.6.1; 64-bit for 9.6.1. http://rcs-testfix2.ratl.swg.usma.ibm.com/cgi-bin/fix_portal.pl

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Document Information

Modified date:
01 May 2020

UID

swg21882846