Format string vulnerabilities in (1) inews or (2) rnews for INN 2.2.3 and earlier allow local users and remote malicious NNTP servers to gain privileges via format string specifiers in NTTP responses.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2002-0520
http://www.securityfocus.com/bid/4501
http://www.iss.net/security_center/static/8834.php
http://archives.neohapsis.com/archives/bugtraq/2002-04/0140.html