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AUSCERT External Security Bulletin Redistribution
ESB-2015.1691.2
Security Bulletin: Dual_EC_DRBG vulnerability and RC4 stream cipher
vulnerability affect WebSphere Transformation Extender
Secure Adapter Collection (CVE-2007-6755, CVE-2015-2808)
30 June 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM WebSphere Transformation Extender Secure Adapter Collection
Publisher: IBM
Operating System: AIX
HP-UX
Linux variants
Solaris
Windows
HP Itanium
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-2808 CVE-2007-6755
Reference: ESB-2015.1689
ESB-2015.1677
ESB-2015.1643
ESB-2015.1620
ESB-2015.1599
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21959577
Revision History: June 30 2015: Updated to include 8.4.1.3 as an affected
version
June 29 2015: Initial Release
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Security Bulletin: Dual_EC_DRBG vulnerability and RC4 stream cipher
vulnerability affect WebSphere Transformation Extender Secure Adapter
Collection (CVE-2007-6755, CVE-2015-2808)
Document information
More support for:
WebSphere Transformation Extender
Secure Adapter Collection
Software version:
8.2.0.0, 8.2.0.1, 8.2.0.2, 8.2.0.3, 8.2.0.4, 8.2.0.5, 8.2.0.6, 8.3.0.0,
8.3.0.1, 8.3.0.2, 8.3.0.3, 8.3.0.4, 8.3.0.5, 8.3.0.6, 8.4.0.0, 8.4.0.1,
8.4.0.2, 8.4.0.3, 8.4.0.4, 8.4.0.5, 8.4.1.0, 8.4.1.1, 8.4.1.2, 8.4.1.3
Operating system(s):
AIX, HP Itanium, HP-UX, Linux, Solaris, Windows
Reference #:
1959577
Modified date:
2015-06-29
Security Bulletin
Summary
Some versions of WebSphere Transformation Extender Secure Adapter Collection
utilize RSA BSAFE SSL-C with the Dual_EC_DRBG random number generation
algorithm. Usage of Dual_EC_DRBG random number generation algorithm might
allow context-dependent attackers to defeat cryptographic protection
mechanisms.
Also, the RC4 Bar Mitzvah Attack for SSL/TLS affects the RSA BSAFE SSL-C
implementation included in IBM WebSphere Transformation Extender Secure
Adapter Collection.
Vulnerability Details
CVEID: CVE-2007-6755
DESCRIPTION: The NIST SP 800-90A default statement of the Dual Elliptic Curve
Deterministic Random Bit Generation (Dual_EC_DRBG) algorithm contains point Q
constants with a possible relationship to certain "skeleton key" values, which
might allow context-dependent attackers to defeat cryptographic protection
mechanisms by leveraging knowledge of those values. NOTE: this is a
preliminary CVE for Dual_EC_DRBG; future research may provide additional
details about point Q and associated attacks, and could potentially lead to a
RECAST or REJECT of this CVE..
CVSS Base Score: 5.8
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/88625 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:N)
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
The following WebSphere Transformation Extender Secure Adapter Collection
versions are vulnerable to both CVE's:
8.2.0.0 - 8.2.0.6
8.3.0.0 - 8.3.0.6
8.4.0.0 - 8.4.0.5
8.4.1.0 - 8.4.1.2
In addition, the following WebSphere Transformation Extender Secure Adapter
Collection version is vulnerable to CVE-2015-2808:
8.4.1.3
Remediation/Fixes
Fix for all affected versions is to download and install the interim fix for
APAR PI42814 from IBM Fix Central.
You should verify applying this fix does not cause any compatibility issues.
The fix disables RC4 stream cipher by default. If you change the default
setting after applying the fix, 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.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
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alerts like this.
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
Complete CVSS Guide
On-line Calculator V2
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
26 June 2015: Original Version Published
29 June 2015: Updated to include 8.4.1.3 as an affected version.
*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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