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From "Emmanuel Lecharny (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DIRSERVER-745) Decoding of lengths can fail if the PDU is splitted
Date Thu, 21 Sep 2006 06:15:23 GMT
    [ http://issues.apache.org/jira/browse/DIRSERVER-745?page=comments#action_12436439 ] 
            
Emmanuel Lecharny commented on DIRSERVER-745:
---------------------------------------------

This issue is not really likely to occurs :
- we must have a PDU which is more than 256 bytes long
- and the length part should be splitted 

However, this is still a serious bug (and easy to fix :). Code reviews are *good* 

> Decoding of lengths can fail if the PDU is splitted
> ---------------------------------------------------
>
>                 Key: DIRSERVER-745
>                 URL: http://issues.apache.org/jira/browse/DIRSERVER-745
>             Project: Directory ApacheDS
>          Issue Type: Bug
>            Reporter: Emmanuel Lecharny
>         Assigned To: Emmanuel Lecharny
>
> While reading the ASN.1 decoder code, I found a pretty nasty case where the decoding
can fail during length decoding :
> if the length is more than 2 bytes long, and if the PDU is splitted just after the second
byte, then we can have a BufferUnderFlowException.
> This can occur because we are reading the buffe without controlling that we still have
some remaining bytes. 

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