Re: [exim] MIME-ACL: Request for MIME checks

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Autor: David
Data:  
A: oliver egginger
CC: exim-users
Assumpte: Re: [exim] MIME-ACL: Request for MIME checks
Hi !!

> I found some useful MIME checks on the exim list (see the attached file mime_acl.cf),
> but there are certainly more. If you do MIME checking with Exims new MIME-ACL,
> please have a look at the attached file and post your increments or improvements
> to the list.


# Bounday Space Gap

   deny   condition   = ${if match{$mime_boundary}{^( |\t)}{yes}{no}}
          message     = Broken MIME container (Boundary Space Gap)


# Empty MIME Boundary Vulnerability

   deny   condition   = $mime_is_multipart
          condition   = ${if eq{$mime_boundary}{}{yes}{no}}
          message     = Broken MIME container (Empty MIME Boundary)


# Long MIME Boundary Vulnerability

   deny   condition   = ${if >{${strlen:$mime_boundary}}{70}{yes}{no}}
          message     = Broken MIME container (Long MIME Boundary)



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It's a fine line between fishing & standing still

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