Under certain conditions, it may be possible to reuse Tivoli Federated Identity Manager Business Gateway (TFIMBG) provided One Time Password tokens.
CVE ID: CVE-2013-5429
The Tivoli Federated Identity Manager Business Gateway 6.2.2 Risk Based Access feature can be configured to require that a user provide a One Time Password (OTP) token before being able to perform a sensitive transaction. As the name implies, these tokens should only be valid for a single use. If a malicious user or system were to obtain such a token and attempt to use it to authenticate after it had already been used, such replay should be denied by TFIMBG. A vulnerability has been discovered that allows OTP tokens to be reused under special conditions.
The attack does not require local network access, but it does require authentication and highly specialized knowledge and techniques. An exploit would not impact the confidentiality of information or the availability of the system, but the integrity of data could be compromised.
CVSS Base Score: 2.1
CVSS Temporal Score: http://xforce.iss.net/xforce/xfdb/87561
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:H/Au:S/C:N/I:P/A:N)
Affected Products and Versions
Tivoli Federated Identity Manager Business Gateway 6.2.2
Vendor Fixes: Patches and installation instructions are provided at the URL listed below.
|TFIMBG 6.2.2||IV52624||TFIMBG 6.2.2 FP9|
Workarounds and Mitigations
13 January 2014: Fix Pack published
31 December 2013: Original copy published
*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.