A denial of service vulnerability in the Tivoli Directory Server can cause a connection to fail to time-out.
A vulnerability in the Tivoli Directory Server can cause a connection to fail to time-out while waiting for incoming data from the client on a SSL/TLS connection. A successful attack could cause a delay or block access while trying to authenticate against applications and services that require this functionality. Non-SSL connections are not affected and only the Tivoli Directory Server server is impacted. The attack can be conducted over the internet. No specialized knowledge is necessary to conduct this attack. No authentication is required for the attack.
CVSS Base Score: 5.0
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/83009 for the current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:N/AC:L/AU:N/C:N/I:N/A:P)
Affected Products and Versions
Running on all supported platforms:
· Tivoli Directory Server versions 18.104.22.168 and 22.214.171.124
The recommended solution is to apply the fix for each named product as soon as practical. See below for information about the fixes available.
For Tivoli Directory Server version 126.96.36.199
· Upgrade to Tivoli Directory Server version 188.8.131.52
For Tivoli Directory Server version 184.108.40.206
· Upgrade to Tivoli Directory Server version 220.127.116.11
If you are unable to upgrade, contact IBM Technical Support.
Workarounds and Mitigations
On-line Calculator V2
*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.
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.