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AUSCERT External Security Bulletin Redistribution
ESB-2015.0695
Security Bulletin:GSKit vulnerable to FREAK - GSKit
Ephemeral RSA Vulnerability
20 March 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM TXSeries
Publisher: IBM
Operating System: AIX
HP-UX
Linux variants
Solaris
Windows
HP Itanium
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21698986
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Security Bulletin:GSKit vulnerable to FREAK - GSKit Ephemeral RSA
Vulnerability
Document information
More support for:
TXSeries
Software version:
7.1, 8.1, 8.2
Operating system(s):
AIX, HP Itanium, HP-UX, Linux/x86, Solaris, Windows
Reference #:
1698986
Modified date:
2015-03-19
Security Bulletin
Summary
GSKit with accept an Ephemeral RSA Key for non export CipherSuites in SSLV3.0
and TLS 1.0
Vulnerability Details
Similar to CVE 2015-0204 in that GSKit will accept a Weak Ephemeral RSA Key
for non export CipherSuites in SSLV3.0 and TLS 1.0. This means a hostile
server that the Client trusts could potentially weaken it's own security with
the Client by downgrading the strength of the connection.
Affected Products and Versions
TXSeries for Multiplatforms V7.1, V8.1, V8.2
Remediation/Fixes
TXSeries for Multiplatforms V7.1:
http://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FTXSeries+for+Multiplatforms&fixids=TXSeries_7.1_SpecialFix_GSKit_8.0.14.48&source=SAR
TXSeries for Multiplatforms V8.1:
http://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FTXSeries+for+Multiplatforms&fixids=TXSeries_8.1_SpecialFix_GSKit_8.0.14.48&source=SAR
TXSeries for Multiplatforms V8.2:
http://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FTXSeries+for+Multiplatforms&fixids=TXSeries_8.2_SpecialFix_GSKit_8.0.14.48&source=SAR
Workarounds and Mitigations
For Clients only:
GSKit V7: None.
GSKit V8: Disable TLS 1.0 and lower.
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References
Complete CVSS Guide
On-line Calculator V2
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
*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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