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             AUSCERT External Security Bulletin Redistribution

            Multiple IBM Informix products .nfx buffer overflow
                              15 October 2009


        AusCERT Security Bulletin Summary

Product:           IBM Informix Client SDK 3.50
                   IBM Informix Connect 3.0
                   IBM Informix Setnet32.exe utility
Publisher:         ISS
Operating System:  AIX
                   Linux variants
                   Mac OS X
                   HP Tru64
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        None
CVE Names:         CVE-2009-3691  

Original Bulletin: 

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Multiple IBM Informix products .nfx buffer overflow
informix-nfx-bo (53644) 	
The risk level is classified as High Risk


Multiple IBM Informix products are vulnerable to a stack-based buffer overflow, 
caused by improper bounds checking when processing .nfx files. By persuading a 
victim to open a specially-crafted .nfx file containing an overly long HostList 
entry, a remote attacker could overflow a buffer and execute arbitrary code on 
the system or cause the application to crash.

  Base Score: 			6.8
  Access Vector: 		Network
  Access Complexity: 		Medium
  Authentication: 		None
  Confidentiality Impact: 	Partial
  Integrity Impact: 		Partial
  Availability Impact: 		Partial
  Temporal Score: 		6.1
  Exploitability: 		Functional
  Remediation Level: 		Unavailable
  Report Confidence: 		Uncorroborated


Gain Access


No remedy available as of October 12, 2009.


    * IBM Web site: Informix Client Software Development Kit and Informix 
    * Retrogod Web Site: IBM Informix Client SDK 3.0 SetNet32 File (.nfx) 
      Hostsize integer overflow exploit.
    * BID-36588: IBM Informix Products Setnet32 Utility '.nfx' File Buffer 
      Overflow Vulnerability
    * CVE-2009-3691: Multiple integer overflows in setnet32.exe 
      in IBM Informix Client SDK 3.0 and 3.50 and Informix Connect Runtime 3.x 
      allow remote attackers to execute arbitrary code via a .nfx file with a 
      crafted (1) HostSize, and possibly (2) ProtoSize and (3) ServerSize, 
      field that triggers a stack-based buffer overflow involving a crafted 
      HostList field. NOTE: some of these details are obtained from third 
      party information.
    * SA36949: IBM Informix Products Setnet32 Utility ".nfx" Processing Buffer 

Platforms Affected:

    * IBM Informix Client SDK 3.50
    * IBM Informix Connect 3.0
    * IBM Informix Setnet32.exe utility


Oct 05, 2009

The information within this database may change without notice. Use of this 
information constitutes acceptance for use in an AS IS condition. There are NO 
warranties, implied or otherwise, with regard to this information or its use. 
Any use of this information is at the user's risk. In no event shall the 
author/distributor (IBM Internet Security Systems X-Force) be held liable for 
any damages whatsoever arising out of or in connection with the use or spread 
of this information.

For corrections or additions please email xforce@iss.net

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