Re: /proc filesystem allows bypassing directory permissions on L
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
討論串 (同標題文章)
完整討論串 (本文為第 30 之 44 篇)：