gld -- format string and buffer overflow vulnerabilities

Gld has been found vulnerable to multiple buffer overflows as
well as multiple format string vulnerabilities.

An attacker could exploit this vulnerability to execute
arbitrary code with the permissions of the user running Gld,
the default user being root.

The FreeBSD port defaults to running gld as the root user.
The risk of exploitation can be minimized by making gld
listen on the loopback address only, or configure it to only
accept connections from trusted smtp servers.