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AUSCERT External Security Bulletin Redistribution
ESB-2014.0714
Security Bulletin: IBM Security Directory Server CPU utili
zation (CVE-2014-0963)
13 May 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Security Directory Server
Publisher: IBM
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-0963
Reference: ESB-2014.0679
Original Bulletin:
http://www-01.ibm.com/support/docview.wss?uid=swg21672724
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Security Bulletin: IBM Security Directory Server CPU utilization
(CVE-2014-0963)
Security Bulletin
Document information
More support for:
IBM Security Directory Server
Software version:
6.1, 6.2, 6.3, 6.3.1
Operating system(s):
All Platforms
Reference #:
1672724
Modified date:
2014-05-09
Summary
IBM Security Directory Server is affected by a problem related to the SSL
implementation which, under very specific conditions, can cause CPU
utilization to rapidly increase.
Vulnerability Details
CVE ID:
CVE-2014-0963
DESCRIPTION:
IBM Security Directory Server is affected by a problem with the handling of
certain SSL messages. The TLS implementation can, under very specific
conditions, cause CPU utilization to rapidly increase. The situation occurs
only in a certain error case that causes a single thread to begin looping. If
this happens multiple times, more threads will begin to loop and an increase
in CPU utilization will be seen. This increase could ultimately result in CPU
exhaustion and unresponsiveness of the IBM Security Directory Server and other
software running on the affected system.
This issue can affect the availability of the system, but does not impact
system confidentiality or integrity. This vulnerability can be remotely
exploited, authentication is not required and the exploit is moderately
complex.
To determine if your systems are being affected by this issue, you can monitor
the CPU utilization for IBM Security Directory Server instances.
CVSS Base Score: 7.1
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/92844
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C)
Affected Products and Versions
All versions of IBM Security Directory Server (ISDS): 6.1.0, 6.2.0, 6.3.0,
6.3.1
Remediation/Fixes
IBM has provided patches for all affected versions. Follow the installation
instructions in the README files included with the patch.
Affected Version Fix
ISDS 6.1.0 6.1.0.61-ISS-ITDS
ISDS 6.2.0 6.2.0.36-ISS-ITDS
ISDS 6.3.0 6.3.0.30-ISS-ITDS
ISDS 6.3.1 6.3.1.2-ISS-ISDS
Workarounds and Mitigations
Monitor CPU utilization of your Program Name instances. If utilization becomes
abnormally high, stop and restart the affected instance.
References
Complete CVSS Guide
On-line Calculator V2
CVE-2014-0963
http://xforce.iss.net/xforce/xfdb/92844
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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