A mistake made

So I was trying to update a binary, but it wouldn't let me put it in my /usr/bin. Now, every time I try to use sudo, it gives me this message: root - /usr/bin/sudo must be owned by uid 0 and have the setuid bit set I've reset my root password, but when I try to do a su root, and fix the problem, it will not let me log in as root. I put the correct password in, and it keeps sayint authentecation failure. I'm not sure if there's anything I can do to fix this.