Honeyd is a virtual honeypot daemon that can simulate virtual hosts on unallocated IP addresses.
A bug in handling NMAP fingerprints caused Honeyd to reply to TCP packets with both the SYN and RST flags set. Watching for replies, it is possible to detect IP addresses simulated by Honeyd.
Although there are no public exploits known for Honeyd, the detection of Honeyd IP addresses may in some cases be undesirable.
Honeyd 0.8 has been released along with an advisory to address this issue. In addition, Honeyd 0.8 drops privileges if permitted by the configuration file and contains command line flags to force dropping of privileges.
All users are recommended to update to honeyd version 0.8:
$> emerge sync $> emerge -pv ">=net-analyzer/honeyd-0.8" $> emerge ">=net-analyzer/honeyd-0.8"