DST2K0008: Buffer Overrun in Sambar Server 4.3

[Security.Team () DELPHISCONSULT CO UK (Security Team)]

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>                                Delphis Consulting Plc
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>
>                                      Security Team Advisories
>                                      [30/05/2000]
>                                       
>
>                            securityteam () delphisplc com
>                 [http://www.delphisplc.com/thinking/whitepapers/]
>       
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> Adv   :       DST2K0008
> Title :       Buffer Overrun in Sambar Server 4.3
> Author        :       DCIST (securityteam () delphisplc com)
> O/S   :       Microsoft Windows NT v4.0 Workstation (SP6)
> Product       :       Sambar Server 4.3
> Date  :       30/05/2000
>
> I.    Description
>
> II.   Solution
>
> III.  Disclaimer
>
>
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> I. Description
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>
>
> Delphis Consulting Internet Security Team (DCIST) discovered the following
> vulnerability in the Sambar Server under Windows NT.
>
> By using the default finger script shipped with Sambar server it is
> possible
> to cause an Buffer overrun in sambar.dll overwriting the EIP allowing the
> execution of arbitry code. This is done by sending a large hostname in the
>
> required field. The string has to be a length of 32286 + EIP (4 bytes)
> making
> a total of 32290 bytes.
>
> From the our research it seems the problem also exists in a number of
> scripts
> which rely on sambar dll functionality this includes but is not limited
> to:
>
> o whois demonstration script
> o finger demonstration script
>
>
> II. Solution
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>
> Vendor Status: Informed
>
> Currently there is no vendor patch available but the following are
> preventative
> measures Delphis Consulting Internet Security Team would advise users
> running
> this service to implement.
>
> o Remove both demonstration scripts.
>
>
> III. Disclaimer
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> THE INFORMATION CONTAINED IN THIS ADVISORY IS BELIEVED TO BE ACCURATE AT
> THE TIME OF PRINTING, BUT NO REPRESENTATION OR WARRANTY IS GIVEN, EXPRESS
> OR
> IMPLIED, AS TO ITS ACCURACY OR COMPLETENESS.  NEITHER THE AUTHOR NOR THE
> PUBLISHER ACCEPTS ANY LIABILITY WHATSOEVER FOR ANY DIRECT, INDIRECT OR
> CONSEQUENTIAL LOSS OR DAMAGE ARISING IN ANY WAY FROM ANY USE OF, OR
> RELIANCE
> PLACED ON, THIS INFORMATION FOR ANY PURPOSE.
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