Security Bulletin: Tivoli Storage Manager Server GSKit Encrypted Record Length Vulnerability (CVE-2012-2191)
A vulnerability exists in the Tivoli Storage Manager server related to SSL/TLS Record Layer Processing (CVE-2012-2191).
A vulnerability (CVE-2012-2191) exists in the IBM Tivoli Storage Manager (TSM) server when used with Secure Sockets Layer (SSL). An included component of the server, IBM Global Security (GSKit), does not properly validate data during execution of a protection mechanism against the Vaudenay SSL CBC timing attack, which allows remote attackers to cause a denial of service (application crash) via crafted values in the TLS Record Layer.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/75994 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Affected Products and Versions
IBM Tivoli Storage Manager server release levels:
· 6.3.0 through 6.3.3.xxx
· 6.2.0 through 6.2.5.xxx
· 6.1.0 through 6.1.5.xxx (AIX and Windows servers only)
· 5.5.0 through 5.5.7.xxx (AIX and Windows servers only)
The recommended solution is to apply the fixes as soon as practical. Please see below for information on the fixes available and the links where the fixes can be downloaded.
|IBM Tivoli Storage Manager Server 6.3||IT01590||220.127.116.11:
|IBM Tivoli Storage Manager Server 6.2||IT01590||18.104.22.168: http://www.ibm.com/support/docview.wss?uid=swg24037241|
|IBM Tivoli Storage Manager Server 6.1 and 5.5, on AIX and Windows only||IBM recommends using the Workaround specified below, or upgrading to a fixed, supported release|
Note: Upgrading to a 7.1 server also remediates this vulnerability.
Workarounds and Mitigations
- Remove the ability for client users to use SSL sessions by changing the server and/or storage agent option files to remove the SSL communication options
- Use a Stream Cipher such as RC4.
On Server levels 5.5.x.x, 6.1.x.x, and 6.2.x.x, mitigation may be made by creating an environment variable as follows:
- Set GSK_V3_CIPHER_SPECS=0504 and GSK_V2_CIPHER_SPECS=1 as a server process environment variable on vulnerable systems.
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ReferencesComplete CVSS v2 Guide
On-line Calculator v2
Related informationIBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
<08 May 2014>: 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.
|Storage Management||Tivoli Storage Manager for Storage Area Networks||AIX, HP-UX, Linux, Solaris, Windows||6.3||All Editions|
|Storage Management||IBM System Storage Archive Manager||Server||AIX, HP-UX, Linux, Solaris, Windows||6.2, 6.1.2, 6.3||All Editions|
|Storage Management||Tivoli Storage Manager Extended Edition||Server||AIX, HP-UX, Linux, Solaris, Windows||5.5, 6.1, 6.2, 6.3|
More support for:
Tivoli Storage Manager
Software version: 5.5, 6.1, 6.2, 6.3
Operating system(s): AIX, HP-UX, Linux, Solaris, Windows
Software edition: All Editions
Reference #: 1672362
Modified date: 08 May 2014