Messages in this thread | | | Date | Tue, 10 Jan 2006 00:07:58 +0000 | From | Matthew Garrett <> | Subject | Re: [patch 0/2] Tmpfs acls |
| |
On Tue, Jan 10, 2006 at 12:59:46AM +0100, Andreas Gruenbacher wrote: > On Monday 09 January 2006 00:34, Matthew Garrett wrote: > > Hmm. Do you have any infrastructure for revoking open file descriptors > > when a user logs out? > > Open file descriptors have nothing to do with it. The device permissions are > set by different pam modules on different distributions (pam_console, > pam_resmgr).
Right. But what stops a user writing an application that opens a device, hangs around after the user logs out and then provides access to the user when logged in remotely?
Handwavy problem scenario - user A logs in, is given access to the soundcard. Starts running a program that when given appropriate signals will record from the system microphone. Logs out. Waits for user B, who he suspects is having an affair with his wife, and then monitors any conversations that user B has. ACLs on their own don't seem to solve this any more than just statically assigning group membership to users.
-- Matthew Garrett | mjg59@srcf.ucam.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |