Bugtraq mailing list archives
Re: /proc filesystem allows bypassing directory permissions on Linux
From: psz () maths usyd edu au
Date: Tue, 27 Oct 2009 11:05:46 +1100
Tony Finch <dot () dotat at> wrote:
Attacker opens [directory] and waits. ... Attacker uses openat() to open and modify the "private" file.
Surely if the permissions do not allow lookup then openat() will fail. [The attacker opened directory when it was searcheable; then permissions were closed; then attacker attempts openat().] Surely directory contents are not cached??!! Cheers, Paul Paul Szabo psz () maths usyd edu au http://www.maths.usyd.edu.au/u/psz/ School of Mathematics and Statistics University of Sydney Australia
Current thread:
- Re: /proc filesystem allows bypassing directory permissions on Linux, (continued)
- Re: /proc filesystem allows bypassing directory permissions on Linux Klaus Lichtenwalder (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux Daryl Tester (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux Pavel Kankovsky (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux Pavel Kankovsky (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux Tony Finch (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux Matthew Dempsky (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux Tony Finch (Oct 27)
- Re: /proc filesystem allows bypassing directory permissions on Linux Matthew Dempsky (Oct 28)
- Re: /proc filesystem allows bypassing directory permissions on Linux psz (Oct 28)
- Re: /proc filesystem allows bypassing directory permissions on Linux Glynn Clements (Oct 29)
- Re: /proc filesystem allows bypassing directory permissions on Linux Matthew Dempsky (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux psz (Oct 27)
- Re: /proc filesystem allows bypassing directory permissions on Linux Pavel Machek (Oct 27)
- Re: /proc filesystem allows bypassing directory permissions on Linux Kinzel, David (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux Dan Yefimov (Oct 26)
- Re: /proc filesystem allows bypassing directory permissions on Linux Dan Yefimov (Oct 27)