Re: Request for cooperation with all burn backends
> Andy Polyakov wrote:
> > Have you seen resmgrd?
> I found this overview of 2006-09-29:
> which differs a bit from the impression i got from
> the SuSE 9.0 man pages.
> One could execute program
> resmgr lock /dev/xyz
> and then open the device by normal means, possibly even
> with O_EXCL.
Last time, I did look at this software, it was full of conceptional bugs
that tend to make the whole a much biger security risk than a clean solution
in libscg or cdrecord.
The program dishonored:
- Problems from pattern matching
- Problems from device aliasing
- General attack scenarios on the basic idea.
It looked to me as a program that has been written by a person that just
discovered the possibility of sending open file descriptors via a socket
connection although this method exists since 1979.
I contacted the Author in hope to discuss the security problems in his
concept but he was not interested in a discussion.
Let me only comment on the non-obvious problems.
> The sysadmin has to set up an appropriate resmgrd
> configuration before this.
Due to the pattern matching, this carries a high risk.
> Further ideas:
> Next i will try to find out wether HAL would be of more
HAL is known to be a non-cooperative program that interrupts
CD/DVD writing. Sun is just working on a new vold implementation
for better GNOME support. Let us wait until this has been finished....
EMail:email@example.com (home) Jörg Schilling D-13353 Berlin
firstname.lastname@example.org (work) Blog: http://schily.blogspot.com/
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