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AUSCERT External Security Bulletin Redistribution
Security Bulletin: TLS fallback protection is available in
IBM DataPower appliances
17 February 2015
AusCERT Security Bulletin Summary
Product: IBM DataPower Gateways
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
CVE Names: CVE-2014-3566
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Security Bulletin: TLS fallback protection is available in IBM DataPower
More support for:
IBM DataPower Gateways
5.0.0, 6.0.0, 6.0.1, 7.0.0
TLS Fallback signaling cipher suite value for preventing protocol downgrade
attacks (TLS_FALLBACK_SCSV) is an update to the TLS protocol, currently in an
IETF draft document. This has been incorporated into IBM DataPower appliances.
DataPower has added support for TLS_FALLBACK_SCSV to allow applications to
block the ability for a MITM attacker to force a protocol downgrade. Some
client applications (such as browsers) will reconnect using a downgraded
protocol to work around interoperability bugs in older servers. This could be
exploited by an active man-in-the-middle to downgrade connections to a lower
protocol (like SSL 3.0) even if both sides of the connection support higher
protocols. Lower protocols such as SSL 3.0 contain a number of weaknesses
including POODLE (CVE-2014-3566).
Affected Products and Versions
TLS fallback protection is not available in all IBM DataPower products and
versions through 188.8.131.52, 184.108.40.206, 220.127.116.11. Note that 7.1.x versions have
TLS fallback protection is available in 18.104.22.168, 22.214.171.124, 126.96.36.199, and
188.8.131.52. Refer APAR IT05922 for URLs to download the fix.
Workarounds and Mitigations
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Complete CVSS Guide
On-line Calculator V2
Vulnerability in SSLv3 affects DataPower (CVE-2014-3566)
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
11 Feb 2015: Original Version 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.
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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