KPPP 2.1.2 in KDE 3.1.5 and earlier, when setuid root without certain wrappers, does not properly close a privileged file descriptor for a domain socket, which allows local users to read and write to /etc/hosts and /etc/resolv.conf and gain control over DNS name resolution by opening a number of file descriptors before executing kppp.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9596
http://www.redhat.com/support/errata/RHSA-2005-175.html
http://www.kde.org/info/security/advisory-20050228-1.txt
http://www.idefense.com/application/poi/display?id=208&type=vulnerabilities
http://www.debian.org/security/2005/dsa-692
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000934