/usr/sbin/se_dpkg is in policycoreutils 2.1.0-3ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | #!/bin/sh
EXEC=`echo $0 | cut -f2 -d_`
if [ "$EXEC" != "dpkg" ]; then
cd /
fi
exec /usr/sbin/run_init $EXEC "$@"
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