Buffer overflow in DNS resolver functions that perform lookup of network names and addresses, as used in BIND 4.9.8 and ported to glibc 2.2.5 and earlier, allows remote malicious DNS servers to execute arbitrary code through a subroutine used by functions such as getnetbyname and getnetbyaddr.
http://www.linux-mandrake.com/en/security/2002/MDKSA-2002-050.php
http://www.kb.cert.org/vuls/id/542971
http://rhn.redhat.com/errata/RHSA-2002-139.html
http://marc.info/?l=bugtraq&m=102581482511612&w=2
http://distro.conectiva.com/atualizacoes/?id=a&anuncio=000507