 |
select-kernel-0.99.2-alt1.noarch |
unsafe-tmp-usage-in-scripts |
fail |
The test discovered scripts with errors which may be used by a user for damaging important system files. For example if a script uses in its work a temp file which is created in /tmp directory, then every user can create symlinks with the same name (pattern) in this directory in order to destroy or rewrite some system or another user's files. Scripts _must_ _use_ mktemp/tempfile or must use $TMPDIR. mktemp/tempfile is safest. $TMPDIR is safer than /tmp/ because libpam-tmpdir creates a subdirectory of /tmp that is only accessible by that user, and then sets TMPDIR and other variables to that. Hence, it doesn't matter nearly as much if you create a non-random filename, because nobody but you can access it. Found error in /usr/sbin/select-kernel: $ grep /tmp/ /usr/sbin/select-kernel message() { printf %s\\n "$PROG: $*" >&2 } debug() { echo "$@" >> /tmp/$PROG.dbg } show_help() { cat << EOF yes= numeric= RELEASE=. FLAVOUR=. CACHE=/tmp/$PROG.$$ trap "rm -f $CACHE" EXIT SIGHUP SIGINT SIGQUIT SIGTERM while [ -n "$1" ]; do if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then show_help |