Security Bulletin
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 https://exchange.xforce.ibmcloud.com/vulnerabilities/92844 for the current score
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. Please install the GSKit package included with the patch.
| Affected Version | GSKit Release | Fix |
| ISDS 6.1.0 | 7.0.4.50 | 6.1.0.61-ISS-ITDS |
| ISDS 6.2.0 | 7.0.4.50 | 6.2.0.36-ISS-ITDS |
| ISDS 6.3.0 | 8.0.50.20 | 6.3.0.30-ISS-ITDS |
| ISDS 6.3.1 | 8.0.50.20 | 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.
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References
*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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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Document Information
Modified date:
16 June 2018
UID
swg21672724