AW: AW: Problems with TNEF and long filenames

Julian Field MailScanner at ecs.soton.ac.uk
Thu Jan 31 11:56:52 GMT 2008


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Fair enough. It will be in the next release.

Ehle, Roland wrote:
> Jules,
>
> thanks again for your help.
>
> Just to have a better understanding: the filename check probably takes place after unpacking TNEF files? If so, I do not see a security problem.
>
> Regards,
> Roland
>
>
> Jules wrote:
> Well I have found it, but I'm a bit reluctant to change it:
>
>           $safename = $message->MakeNameSafe($_->longname, $dir);
>           push @replacements, $safename;
>           #print STDERR "Safe name is \"$safename\"\n";
>           $message->{entity}->attach(Type => "application/octet-stream",
>                                      Encoding => "base64",
>                                      Disposition => "attachment",
>                                      Filename => $safename,
>                                      Path => $filename);
>
> Putting a dangerous filename back in the e-mail is a bit dodgy from a
> security point of view. But I could change
>                                      Filename => $safename,
> to
>                                      Filename => $_->longname,
> which should fix it.
>
> What does anyone think?
>   

Jules

- -- 
Julian Field MEng CITP CEng
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