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  • Committer: Teddy Hogeborn
  • Date: 2014-06-08 03:10:08 UTC
  • mto: (237.7.272 trunk)
  • mto: This revision was merged to the branch mainline in revision 317.
  • Revision ID: teddy@recompile.se-20140608031008-mc9bd7b024a3q0y0
Address a very theoretical possible security issue in mandos-client.

If there were to run some sort of "cleaner" process for /run/tmp (or
/tmp), and mandos-client were to run for long enough for that cleaner
process to remove the temporary directory for GPGME, there was a
possibility that another unprivileged process could trick the (also
unprivileged) mandos-client process to remove other files or symlinks
which the unprivileged mandos-client process was allowed to remove.
This is not currently known to have been exploitable, since there are
no known initramfs environments running such cleaner processes.

* plugins.d/mandos-client.c (main): Use O_NOFOLLOW when opening
                                    tempdir for cleaning.

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init.d-mandos
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#! /bin/sh
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### BEGIN INIT INFO
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# Provides:          mandos
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# Required-Start:    $remote_fs $syslog avahi
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# Required-Stop:     $remote_fs $syslog avahi
 
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# Required-Start:    $remote_fs $syslog avahi-daemon
 
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# Required-Stop:     $remote_fs $syslog avahi-daemon
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# Default-Start:     2 3 4 5
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# Default-Stop:      0 1 6
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# Short-Description: Mandos server
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. /lib/init/vars.sh
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# Define LSB log_* functions.
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# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
 
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# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
 
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# and status_of_proc is working.
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. /lib/lsb/init-functions
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#
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                2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
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        esac
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        ;;
 
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  status)
 
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        status_of_proc "$DAEMON" "$NAME" -p "$PIDFILE" && exit 0 || exit $?
 
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        ;;
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  #reload|force-reload)
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        #
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        # If do_reload() is not implemented then leave this commented out
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                esac
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                ;;
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          *)
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                # Failed to stop
 
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                # Failed to stop
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                log_end_msg 1
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                ;;
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        esac
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        ;;
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  status)
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        status_of_proc "$DAEMON" "$NAME" -p "$PIDFILE"
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        ;;
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  *)
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        #echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
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        echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
 
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        echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
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        exit 3
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        ;;
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esac