CVE-2002-1511
The vncserver wrapper for vnc before 3.3.3r2-21 uses the rand() function instead of srand(), which causes vncserver to generate weak cookies.
Date published : 2004-09-01
http://www.securityfocus.com/bid/6905
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640