Advisory Details

September 29th, 2010

IBM TSM FastBack Server _DAS_ReadBlockReply Remote Denial of Service Vulnerability

ZDI-10-187
ZDI-CAN-664

CVE ID
CVSS SCORE
AFFECTED VENDORS IBM
AFFECTED PRODUCTS Tivoli Storage Manager FastBack
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['9649']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to create a denial of service condition on vulnerable installations of IBM Tivoli FastBack Server. Authentication is not required to exploit this vulnerability.

The specific flaw exists within FastBackServer.exe process which listens by default on TCP port 11406. The problematic code resides within a function responsible for reading a block of network packet data. A parameter to this function is initialized to 0 and under certain conditions this value will be accessed before properly initialized. This causes a NULL pointer to be dereferenced and subsequent application crash due to a lack of exception handling. Successful exploitation leads to immediate termination of the fastback server.

ADDITIONAL DETAILS

http://www.ibm.com/support/docview.wss?uid=swg21443820
Issue 3


DISCLOSURE TIMELINE
  • 2010-02-02 - Vulnerability reported to vendor
  • 2010-09-29 - Coordinated public release of advisory
CREDIT Sebastian Apelt (www.siberas.de)
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