The xntpd ntp (ntpd) daemon before 4.2.0b, when run with the -u option and using a string to specify the group, uses the group ID of the user instead of the group, which causes xntpd to run with different privileges than intended.
secunia.com/advisories/16602
secunia.com/advisories/21464
securitytracker.com/id?1016679
www.debian.org/security/2005/dsa-801
www.mandriva.com/security/advisories?name=MDKSA-2005:156
www.osvdb.org/19055
www.redhat.com/support/errata/RHSA-2006-0393.html
www.securityfocus.com/bid/14673
www.securityspace.com/smysecure/catid.html?id=55155
www.vupen.com/english/advisories/2005/1561
exchange.xforce.ibmcloud.com/vulnerabilities/22035
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9669