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ZDI-10-184: IBM TSM FastBack Server USER_S_AddADGroup Remote Code Execution Vulnerability



ZDI-10-184: IBM TSM FastBack Server USER_S_AddADGroup Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-184
September 29, 2010

-- CVSS:
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)

-- Affected Vendors:
IBM

-- Affected Products:
IBM Tivoli Storage Manager FastBack

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9490. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of IBM Tivoli FastBack Server. Authentication
is not required to exploit this vulnerability.

The specific flaw exists within FastBackServer.exe which listens by
default on TCP port 11460. The issue is due to a strcat of user supplied
data to a fixed length buffer located on the stack. By providing
sufficiently large values for a group, workgroup, or domain name this
buffer can be overflowed. Successful exploitation leads to remote code
execution under the context of the fastback server.

-- Vendor Response:
IBM states:
http://www.ibm.com/support/docview.wss?uid=swg21443820
Issue 2

-- Disclosure Timeline:
2010-02-02 - Vulnerability reported to vendor
2010-09-29 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Sebastian Apelt (www.siberas.de)

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