full-disclosure - Re: hard links on Linux create local DoS vulnerability and security problems

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20031124202917.GM12047@tpetrasek.acs.internap.com>
From: tpetrasek at internap.com (Trent Petrasek)
Subject: Re: hard links on Linux create local DoS vulnerability and security problems

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


Not sure what systems you may be referring to, but in my experience, /tmp is mounted as a device or mounted as swap, thus violating the 'cross-device' limitation of a hard link.

- --------------------------------------------------------
 Trenton Petrasek         
 tpetrasek@...ernap.com
- --------------------------------------------------------

On Mon, Nov 24, 2003 at 07:38:38PM +0100, Carl Ekman <calle@...ig.nu> wrote:
> Since many systems have /tmp on the root filesystem /tmp could also be used to 
> link to setuid binaries.
> 
> > The link to setuid programs is more of concern except that it won't be able
> > to happen unless you have setuid-root programs in a home directory
> > partition, which sounds bad anyway.
> 
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (FreeBSD)

iD8DBQE/wmod1CLn4SP2qlMRAj32AJ0SIUPimA403t8UtpJUBLstQWnIugCfdHsx
sgoItycHopzinkdOwhVwCgc=
=dFtb
-----END PGP SIGNATURE-----