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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0695 Security Bulletin: TSM FastBack GSKit Certificate Chaining Vulnerability 9 May 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Tivoli Storage Manager FastBack Publisher: IBM Operating System: Windows Linux variants Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2013-6747 Reference: ESB-2014.0309 ESB-2014.0201 ESB-2014.0113 Original Bulletin: http://www-01.ibm.com/support/docview.wss?uid=swg21670524 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: TSM FastBack GSKit Certificate Chaining Vulnerability (CVE-2013-6747) Security Bulletin Document information More support for: Tivoli Storage Manager FastBack Software version: All Supported Versions Operating system(s): Platform Independent Software edition: All Editions Reference #: 1670524 Modified date: 2014-05-05 Summary A vulnerability has been identified in the IBM Global Security Kit (GSKit) component utilized by IBM Tivoli Storage Manager (TSM) FastBack. A malformed certificate chain can cause the TSM FastBack process using GSKit to hang or crash. FastBack 6.1.9.1 or higher contains the fixing GSKit level, and is available. Vulnerability Details CVE ID: CVE-2013-6747 DESCRIPTION: TSM FastBack uses GSKit for Secure Sockets Layer (SSL) connections. The GSKit implementation is vulnerable to an attack from a malformed certificate chain, containing circular reference that causes the chain building logic to loop. Were an attacker to use such a certificate when initiating an SSL connection, they could cause the TSM FastBack process to hang or crash due to memory exhaustion. An exploit could compromise the availability of the system. CVSS: CVSS Base Score: 7.1 CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/89863 CVSS Environmental Score*: Undefined CVSS Vector: (AV/N:AC/M:Au/N:C/N:I/N:A/C) Affected Products and Versions All supported versions of IBM Tivoli Storage Manager FastBack Remediation/Fixes Upgrade to IBM Tivoli Storage Manager (TSM) FastBack version 6.1.9.1 or higher as soon as possible. Workarounds and Mitigations Do not enable 'Encryption' in the DR Parameters section of the DR Configuration tab in the General Configuration window in the FastBack Server. References Complete CVSS Guide On-line Calculator V2 CVE-2013-6747 X-Force Vulnerability Database http://xforce.iss.net/xforce/xfdb/89863 Related information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog Change History 5 May 2014: Original version 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. 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. Cross reference information Segment Product Component Platform Version Edition Storage Management Tivoli Storage Manager FastBack Center Platform Independent All Versions All Editions Storage Management Tivoli Storage Manager FastBack for Bare Machine Recovery Windows 6.1 All Editions - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBU2xVnxLndAQH1ShLAQLFrg/9EJu2RjRNsnjiFy0VKVeR2bEOHrfQ12QI 4uZswC4by13+QeD2X08S0xcgJAiMybaOIKAWtofyJfMEOs0W2n/cLrRG7zC9ilEI NJ65a02CcZOoa31u4Der58Gt092IJ86ATMftf2bxyUlYoMTdFjRjlnDG4XHCS6wq t0kjov8JlZ1oOS4MO8PUwx/2xeVsDrOYycnwd77oygzf6EY+c0FuIcXA2ZOt1Fz+ KYETvqGmf/2gZ9MjchpUP8jdFSN8OwQIv4s2ZHzqUn4fpBUfQmRObEfob/0PLCkJ HHex//QZxFjUcMpN4Z2Fzb1U6b7LgJHFAgmMid7AoRT/gvvMQ1s2hKe4AcIAIj3V itpBrvejZSEKbPru+zKmD8DnuBHEflmGCcFFFZBZ513+0zYFR51vO/lqA4giTkr1 ljzNzA0RTKebV97W1/fdRLLlJHO0sX2imAlXAo+Znbxs09usyAbPEGWUBCdHDFW2 5MKtqVJst4x3t2RR5iR3nFJSZquibSBCgyiqfCq3ezYRVT6HkTB6gLbZNEXDLZfa IyQ8h2IdPv4993YM9pQPhUgvXNPkXgpxhjLhAQgRpUrttk6viBtcq4Z9gY/Mdhhx P3By0ncCcf8QsC7wzFNkCCE1YPIebVgfl0vaZwKmzAwDPPfiwJtpOA5b54CWxWyX /aW3ilpvv1A= =s1OJ -----END PGP SIGNATURE-----