Buffer overflow in ntpd ntp daemon 4.0.99k and earlier (aka xntpd and xntp3) allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long readvar argument.
https://www.debian.org/security/2001/dsa-045
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3831
https://exchange.xforce.ibmcloud.com/vulnerabilities/6321
http://www.redhat.com/support/errata/RHSA-2001-045.html
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-036.php3
http://www.calderasystems.com/support/security/advisories/CSSA-2001-013.0.txt
http://marc.info/?l=bugtraq&m=98684532921941&w=2
http://marc.info/?l=bugtraq&m=98684202610470&w=2
http://marc.info/?l=bugtraq&m=98683952401753&w=2
http://marc.info/?l=bugtraq&m=98679815917014&w=2
http://marc.info/?l=bugtraq&m=98659782815613&w=2
http://marc.info/?l=bugtraq&m=98654963328381&w=2
http://marc.info/?l=bugtraq&m=98642418618512&w=2
http://lists.suse.com/archives/suse-security-announce/2001-Apr/0000.html
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000392
http://archives.neohapsis.com/archives/bugtraq/2001-04/0314.html
http://archives.neohapsis.com/archives/bugtraq/2001-04/0225.html
http://archives.neohapsis.com/archives/bugtraq/2001-04/0127.html