Date: Tue, 22 Nov 2011 22:39:03 +0100 From: Yves-Alexis Perez <corsac@...ian.org> To: oss-security@...ts.openwall.com Subject: Re: Re: [LightDM] Version 1.0.6 released On ven., 2011-11-11 at 13:27 -0500, Marc Deslauriers wrote: > On Fri, 2011-11-11 at 10:05 +0000, John Haxby wrote: > > On 11/11/11 08:06, Guido Berhoerster wrote: > > > Replacing the file between the lstat and the open would change > > > its inode and then be caught by the check before the fchown, no? > > > > Nope. There is no reason why the same inode should not be reused. > > > > On ext4 (btrfs seems to be different): > > > > $ touch test; ls -i test; rm test; touch test; ls -i test > > 656078 test > > 656078 test > > > > jch > > How about the attached patch? > > Marc. Note that O_NOFOLLOW seems to be Linux-only. Any idea how to handle it on other ports? Regards, -- Yves-Alexis Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)
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