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By default, $PGUSER has permission to unlink $PGLOG. If $PGUSER replaces $PGLOG with a symbolic link, the server will corrupt the link-targeted file by appending log messages. Since these scripts open $PGLOG as root, the attack works regardless of target file ownership. "make install" does not install these scripts anywhere. Users having manually installed them in the past should repeat that process to acquire this fix. Most script users have $PGLOG writable to root only, located in $PGDATA. Just before updating one of these scripts, such users should rename $PGLOG to $PGLOG.old. The script will then recreate $PGLOG with proper ownership. Reviewed by Peter Eisentraut. Reported by Antoine Scemama. Security: CVE-2017-12172
67 lines
1.4 KiB
Bash
67 lines
1.4 KiB
Bash
#! /bin/sh
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# PostgreSQL boot time startup script for FreeBSD. Copy this file to
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# /usr/local/etc/rc.d/postgresql.
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# Created through merger of the Linux start script by Ryan Kirkpatrick
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# and the script in the FreeBSD ports collection.
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# contrib/start-scripts/freebsd
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## EDIT FROM HERE
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# Installation prefix
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prefix=/usr/local/pgsql
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# Data directory
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PGDATA="/usr/local/pgsql/data"
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# Who to run the postmaster as, usually "postgres". (NOT "root")
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PGUSER=postgres
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# Where to keep a log file
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PGLOG="$PGDATA/serverlog"
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## STOP EDITING HERE
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# The path that is to be used for the script
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PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
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# What to use to start up the postmaster. (If you want the script to wait
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# until the server has started, you could use "pg_ctl start" here.)
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DAEMON="$prefix/bin/postmaster"
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# What to use to shut down the postmaster
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PGCTL="$prefix/bin/pg_ctl"
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# Only start if we can find the postmaster.
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test -x $DAEMON ||
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{
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echo "$DAEMON not found"
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exit 0
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}
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case $1 in
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start)
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su -l $PGUSER -c "$DAEMON -D '$PGDATA' >>$PGLOG 2>&1 &"
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echo -n ' postgresql'
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;;
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stop)
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su -l $PGUSER -c "$PGCTL stop -D '$PGDATA' -s"
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;;
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restart)
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su -l $PGUSER -c "$PGCTL stop -D '$PGDATA' -s"
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su -l $PGUSER -c "$DAEMON -D '$PGDATA' >>$PGLOG 2>&1 &"
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;;
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status)
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su -l $PGUSER -c "$PGCTL status -D '$PGDATA'"
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;;
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*)
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# Print help
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echo "Usage: `basename $0` {start|stop|restart|status}" 1>&2
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exit 1
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;;
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esac
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exit 0
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