[aur-general] AUR no more extracting source tarballs ( was: Upgraded AUR to 1.8.0)

[Lukas Fleischer]

On Mon, Feb 21, 2011 at 10:51:01AM -0500, Loui Chang wrote:
> On Mon 21 Feb 2011 16:35 +0100, Lukas Fleischer wrote:
> > On Mon, Feb 21, 2011 at 03:46:47PM +0100, Dieter Plaetinck wrote:
> > > On Mon, 21 Feb 2011 14:50:39 +0100
> > > Lukas Fleischer <archlinux at cryptocrack.de> wrote:
> > > 
> > > 
> > > > The only issue that might affect the end users as well is "ZIP bombs".
> > > > Most users will probably notice such a thing before it is entirely
> > > > extracted, just interrupt tar(1)/gzip(1) and send a removal request to
> > > > aur-general, however.
> > > 
> > > hmmm. some good points.
> > > I guess I could try the suggested approach and see how I like it.
> > > However, now that you bring up the "zip bombs", do you think it's
> > > feasible to scan for them serverside without compromising security
> > > and/or making things needlessly complicated? it would be useful for
> > > clients if that one aspect could be filtered out in advance.
> > 
> > I don't think this is possible without decompressing the tarball which
> > is again vulnerable to (D)DoS.
> 
> It might be possible. There are xz -l and gunzip -l functions to preview
> the uncompressed size of archives without decompression.

Hm, that doesn't sound too bad. We'd need to integrate this with
Archive::Tar tho... It might be best to open a feature request on the
AUR bug tracker at this point.