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AUSCERT External Security Bulletin Redistribution
ESB-2015.0881
Security Bulletin: Ephemeral RSA Vulnerability in Communications Server for
Data Center Deployment, Communications Server for AIX, Communications
Server for Linux, Communications Server for Linux on System
z, Communications Server for Windows (CVE-2015-0138)
8 April 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Communications Server for Data Center Deployment
Publisher: IBM
Operating System: AIX
Linux variants
Windows
Impact/Access: Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-0138
Reference: ESB-2015.0876
ESB-2015.0874
ESB-2015.0859
ESB-2015.0589
ESB-2015.0542
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21700834
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Security Bulletin: Ephemeral RSA Vulnerability in Communications Server
for Data Center Deployment, Communications Server for AIX, Communications
Server for Linux, Communications Server for Linux on System z, Communications
Server for Windows (CVE-2015-0138)
Document information
More support for:
Communications Server for Data Center Deployment
Software version:
7.0.0.0
Operating system(s):
AIX, Linux, Linux on System z
Reference #:
1700834
Modified date:
2015-04-02
Security Bulletin
Summary
GSKit in Communications Server with accept an Ephemeral RSA Key for non
export CipherSuites in SSLV3.0 and TLS 1.0
Vulnerability Details
CVE ID: CVE-2015-0138
Description: Ephemeral RSA vulnerability.
CVSS Base Score: 4.3
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/100691 for the
current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Affected Products and Versions
VERSIONS AFFECTED: This problem affects the following distributed
Communications Server products:
Product ID Product name
- ------------- --------------------
5725H32 Communications Server for Data Center Deployment 7.0
5639F25 Communications Server for Windows V6.4 , V6.1.3
5765E51 Communications Server for AIX V6.4
5724I33 Communications Server for Linux V6.4
5724I34 Communications Server for Linux on System z V6.4
Remediation/Fixes
The following GSKit levels will support the CVE-2015-0138 for the ephemeral
RSA vulnerability as well as all previously reported vulnerabilities.
Minimum level of GSKit for Communications Server for AIX V6.4, Communications
Server for Windows V6.4, Communications Server for Linux V6.4, Communications
Server for Linux on System z V6.4 and Communications Server for Data Center
Deployment V7 is:
GSKit 8.0-50.41
Minimum level of GSKit for Communications Server for Windows V6.1.3 is:
GSKit 7.0-5.5
The recommended solution is to apply the Fix Pack or PTF for each named
product as soon as practical. Visit Fix Central to find these APARs (under
Other Software brand).
Product ID Product name
- ------------- --------------------
5725H32 Communications Server for Data Center Deployment 7.0
- - apply the latest GSKit update package for level 7.0.0.2 on AIX or
Linux plaform
5765E51 Communications Server for AIX V6.4
- - - apply the latest GSKit update package for level 6.4.0.5 on AIX platform
5724I33 Communications Server for Linux V6.4
- - - apply the latest GSKit update package for level 6.4.0.5 on Linux platform
5724I34 Communications Server for Linux on System z V6.4
- - - apply the latest GSKit update package for level 6.4.0.5 on Linux platform
5639F25 Communications Server for Windows V6.4
- - apply the latest GSKit update package for level 6.4.0.6 on Windows plaform
5639F25 Communications Server for Windows V6.1.3
- - - apply the latest GSKit update package for level 6.1.3.5 on Windows
platform
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
Subscribe to My Notifications to be notified of important product support
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
Subscribe to Security Bulletins
Change History
03/30/15 - initial creation
*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.
Product Alias/Synonym
csdcd csaix cslinux commserver comm server sna aixsna
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