WARNING! New GNU Tar in 5-CURRENT could erroneously createworld writeable dirs

Maxim Sobolev sobomax at FreeBSD.ORG
Fri Sep 24 08:50:46 PDT 2004

> > 
> > Hi,
> > 
> > I've just noticed that something wrong with the new tar in the base
> > system (1.13.25) - when extracting some archives it creates 777 dirs,
> > while permissions in the archive itself are OK (for example GNU make
> > make-3.79.1.tar.gz - top level dir gets 777 as well as several
> > other lowel level dirs). The issue is under investigation.
> Should be solved now. Stupid GNU folks for some reason decided that
> when tar is executed as uid 0 then by default umask(2) should not be
> applied to files and dirs being extracted.

That said, anybody who runs 5.0-CURRENT with the new tar is advised to
clean up all ports' WRKDIRs she might have, to avoid being trojaned
by a local user.


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