Format string vulnerability in Network Solutions Rwhoisd 1.5.7.2 and earlier, when using syslog, allows remote attackers to corrupt memory and possibly execute arbitrary code via a rwhois request that contains format specifiers.
http://marc.info/?l=bugtraq&m=100655265508104&w=2
http://lists.research.netsol.com/pipermail/rwhois-announce/2001-November/000023.html