It indicates a buffer overflow vulnerability in GNU Anubis.
Anubis is a mail processor for Linux-based operating systems. Due to inadequate boundary checking in the IDENT protocol support, a remote attacker can execute arbitrary code on a target system by passing it specially-crafted packets.
Any unprotected GNU Anubis 3.62, 3.9.92 or 3.9.93 is vulnerable to the attack.
Attackers can execute arbitrary commands on the victim system.
Apply appropriate patches and/or upgrade the program to the latest non-vulnerable version.