GDM 2.4.4.x before 2.4.4.4, and 2.4.1.x before 2.4.1.7, does not restrict the size of input, which allows attackers to cause a denial of service (memory consumption).
https://exchange.xforce.ibmcloud.com/vulnerabilities/13447
http://www.securityfocus.com/bid/8846
http://www.mandriva.com/security/advisories?name=MDKSA-2003:100
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000766
http://cvs.gnome.org/bonsai/cvsblame.cgi?file=gdm2/NEWS&rev=&root=/cvs/gnome