Advisory Details

September 29th, 2010

IBM TSM FastBack Server _Eventlog Format String Remote Code Execution Vulnerability

ZDI-10-185
ZDI-CAN-657

CVE ID
CVSS SCORE 10.0, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS IBM
AFFECTED PRODUCTS Tivoli Storage Manager
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9965. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of IBM Tivoli Storage Manager Fastback. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the FastBack server process (FastBackServer.exe) which listens by default on TCP port 11406. The process searches received packet data for a pipe character (0x7c) and then sends the remaining portion of the string to the event log without sanitization. By providing a specially crafted string with format specifiers this can be leveraged to trigger a format string vulnerability which can lead to arbitrary code execution in the context of the server process.

ADDITIONAL DETAILS

http://www.ibm.com/support/docview.wss?uid=swg21443820
Issue 2


DISCLOSURE TIMELINE
  • 2010-01-06 - Vulnerability reported to vendor
  • 2010-09-29 - Coordinated public release of advisory
CREDIT Sebastian Apelt (www.siberas.de)
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