Comment 7 for bug 564842

I have the same issue with sudo not obeying ctrl+c.
However, I don't think that winbind is the reason why. I use a fingerprint reader so I had to add my own auth line.
Here is my /etc/pam.d/common-auth:

auth sufficient pam_thinkfinger.so
auth [success=1 default=ignore] pam_unix.so try_first_pass nullok_secure
auth requisite pam_deny.so
auth required pam_permit.so