"Alexander E. Patrakov" <[email protected]> wrote:
> On Thursday 26 May 2005 16:15, Joerg Schilling wrote:
>
> > The problem was that you could send SCSI commands on R/O fds and fixing the
> > problem would have been to forbid sending SCSI commands on R/O fds.
>
> Unfortunately, this is not going to work. It would work only if the only app
> that has to send SCSI commands were cdrecord. Then really, a non-setuid
> program just would not be able to get a R/W fd, and setuid ones are assumed
> to be trusted.
If these programs did rely on the named security bug, then these programs
were broken anyway and need to be fixed. Note that the _old_ (non ioctl based)
/dev/sg interface needed write access in order to send SCSI commands.
> The problem is that many CD audio players also send SCSI commands in order to
> extract digital audio data. Are you proposing to make them setuid root? use a
> well-defined setuid helper? other solution?
If these programs did ever work before, someone did break them meanwhile.
Jörg
--
EMail:[email protected] (home) Jörg Schilling D-13353 Berlin
[email protected] (uni)
[email protected] (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
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