Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== 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 =========================================================================== 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 - --------------------------BEGIN INCLUDED TEXT-------------------- 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. Get Notified about Future Security Bulletins Subscribe to My Notifications to be notified of important product support 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVTmYYhLndAQH1ShLAQIj5w//Yo43vZsRJmNLqBTa++Mx8vy8VliLrYs+ WiLCpO1jT50HRvLyl9/ds9UkT8rKfQ2aFX2IZt3nbGEhStnVqekBQa/AmPt3f2Ps f+UtEwZbLn6zvTA1ntWyATcqVkhVEvjHSMB6vTFnsKLcFFPP2X2dx4UKU81NMgu2 V1A1o3933veSwW9vat9I2mgOvF7jGXS58tBoru4gcMAYZx/wYpXEGBiUMCnQSHTe Ty5mvCCxTGD3rb3KrS8hGzbKd8dUkmll89GEVPsomsZx8STxeTXkt6YF+ECWF7fv ubSABGXsnNwmODX0+zlkTQZhxR67I78/bZzi+RUq4lx0egISxVP1qp4NiV3sQmKQ KTwpwkoz05tGqmbl3+271EvrnNuW4PCHhMMQzk1RLEhAkZHC0osXfOd3XvNsDKxK UERS4EVPRjAs0l0Fk+js2IcNi73tLk3Lx7YhBQ+iUQNp9gMw4temNB5dDDqa2XVf +FTStxeaBUo+ltx6Q7Z75nkGyNr7VnbZQ7UMkILF5ug2ff+7dHF3a5iNrJFvKtaf jqf+SRbV3nnmUr9atBTkCfYwaaauDx8VKgcWTw2vnNutGT42jvlNdUw8JCMiOM0V OYsjbohVip3VB/3rfXU4JLPj4ZM5bNwgwaLr2Dhsl66yBzw4UqIHNC5AXTgSJkk+ ZOvyuTqFf9M= =WiTI -----END PGP SIGNATURE-----