Oh ****... Sudo has a 'make anyone root' bug that needs to be patched – if you're unlucky enough to enable pwfeedback

Most distros unaffected unless defaults were changed, but do check

Sudo, a standard tool on Unix-y operating systems that lets select users run some or all commands as root, can be exploited to give superpowers to any logged-in user - if deployed with a non-default configuration."