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AUSCERT External Security Bulletin Redistribution
ESB-2015.2488
Security Bulletin: Vulnerability in Diffie-Hellman ciphers
affects IBM NetInsight (CVE-2015-4000)
24 September 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM NetInsight
Publisher: IBM
Operating System: AIX
Linux variants
Solaris
Windows
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-4000
Reference: ESB-2015.1455.2
ESB-2015.1454.2
ESB-2015.1453.2
ESB-2015.1452
ESB-2015.1445
ESB-2015.1443
ESB-2015.1432
ESB-2015.1425
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21960895
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Security Bulletin: Vulnerability in Diffie-Hellman ciphers affects IBM
NetInsight (CVE-2015-4000)
Security Bulletin
Document information
More support for:
Unica NetInsight
Software version:
8.6
Operating system(s):
AIX, Linux, Solaris, Windows
Reference #:
1960895
Modified date:
2015-09-23
Summary
The Logjam Attack on TLS connections using the Diffie-Hellman (DH) key exchange
protocol affects IBM NetInsight
Vulnerability Details
CVEID: CVE-2015-4000
DESCRIPTION: The TLS protocol could allow a remote attacker to obtain sensitive
information, caused by the failure to properly convey a DHE_EXPORT ciphersuite
choice. An attacker could exploit this vulnerability using man-in-the-middle
techniques to force a downgrade to 512-bit export-grade cipher. Successful
exploitation could allow an attacker to recover the session key as well as
modify the contents of the traffic. This vulnerability is commonly referred to
as "Logjam".
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/103294
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)
Affected Products and Versions
IBM NetInsight 8.6.0
Remediation/Fixes
Product VRMF Remediation/First Fix
IBM NetInsight 8.6.0.14 Fix packs and Interim Fixes can be downloaded here:
IBM NetInsight http://www.ibm.com/support/docview.wss?uid=swg24035940
As the length of the server key size are increased, the amount of CPU required
for full TLS/SSL handshake can significantly increase. Please carefully test
and assess the impact to your CPU requirements to ensure sufficient CPU
resources, otherwise the system availability may be impacted.
You should verify applying this configuration change does not cause any
compatibility issues. 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 Diffie-Hellman key-exchange protocol used in TLS and take appropriate
mitigation and remediation actions.
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References
Complete CVSS v3 Guide
On-line Calculator v3
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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