MaraDNS is a proxy DNS server with permanent caching.
A long DNS hostname with a large number of labels could trigger a buffer overflow in the compress_add_dlabel_points() function of dns/Compress.c.
A remote unauthenticated attacker could execute arbitrary code or cause a Denial of Service.
There is no known workaround at this time.
All MaraDNS users should upgrade to the latest stable version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-dns/maradns-1.4.06"
NOTE: This is a legacy GLSA. Updates for all affected architectures are available since February 12, 2011. It is likely that your system is already no longer affected by this issue.