Description of problem: When running /sbin/ifup or /sbin/ifdown via a SUID-root binary, the $UID value is still set to the user's UID, but the $EUID value is set to 0. This prevents the ifdown or ifup scripts from completing. Instead they give the message: "Users cannot control this device." This should obviously not be the case since the EUID is 0. Version-Release number of selected component (if applicable): FC6: initscripts-8.45.3-1 How reproducible: Every time. Steps to Reproduce: 1. make sure interface config has USERCTL=no 2. make a suid-root binary that operates under euid=0 but uid=X, and calls ifup/ifdown. 3. run the suid-root binary to bring up/down the interface Actual results: Users cannot control this device. Expected results: interface goes up/down Additional info: Workaround is to add USERCTL=yes to the ifcfg-<iface> file, but this makes security problems.
Why is that any more security problems that a different setuid helper?
Hi Bill, Thanks for looking at this. My USERCTL=yes security concern is that any user can then manage the interface in general, which is not what I want. My suid wrapper is only for specific conditions. Do you agree that checking $EUID is the correct action here? Thanks. -Chris
Fedora apologizes that these issues have not been resolved yet. We're sorry it's taken so long for your bug to be properly triaged and acted on. We appreciate the time you took to report this issue and want to make sure no important bugs slip through the cracks. If you're currently running a version of Fedora Core between 1 and 6, please note that Fedora no longer maintains these releases. We strongly encourage you to upgrade to a current Fedora release. In order to refocus our efforts as a project we are flagging all of the open bugs for releases which are no longer maintained and closing them. http://fedoraproject.org/wiki/LifeCycle/EOL If this bug is still open against Fedora Core 1 through 6, thirty days from now, it will be closed 'WONTFIX'. If you can reporduce this bug in the latest Fedora version, please change to the respective version. If you are unable to do this, please add a comment to this bug requesting the change. Thanks for your help, and we apologize again that we haven't handled these issues to this point. The process we are following is outlined here: http://fedoraproject.org/wiki/BugZappers/F9CleanUp We will be following the process here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping to ensure this doesn't happen again. And if you'd like to join the bug triage team to help make things better, check out http://fedoraproject.org/wiki/BugZappers
This bug is open for a Fedora version that is no longer maintained and will not be fixed by Fedora. Therefore we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen thus bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.