/usr/bin/cautious-launcher is in mime-support 3.51-1ubuntu1.
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 10 11 12 13 14 15 16 17 | #!/bin/bash
# For use with .desktop files and MIME handlers so that the Ubuntu Policy
# can be followed: programs cannot be executed when they lack the execute bit.
# https://wiki.ubuntu.com/SecurityTeam/Policies#Execute-Permission%20Bit%20Required
exe="$1"
shift || true
if [ -n "$exe" ] && [ ! -x "$exe" ] && \
[ "${exe:0:5}" != "/usr/" ] && [ "${exe:0:5}" != "/opt/" ]
then
if [ -n "$DISPLAY" ] && [ -x /usr/bin/zenity ]; then
/usr/bin/zenity --error --title "Blocked: $*" --text "The file '$exe' is not marked as executable. If this was downloaded or copied from an untrusted source, it may be dangerous to run. For more details, read about the <a href=\"https://wiki.ubuntu.com/Security/ExecutableBit\">executable bit</a>."
else
echo "$*: '$exe' is not executable. Aborting." >&2
fi
exit 1
fi
exec "$@" "$exe"
|