Memory leak in libmcrypt before 2.5.5 allows attackers to cause a denial of service (memory exhaustion) via a large number of requests to the application, which causes libmcrypt to dynamically load algorithms via libtool.
http://www.securityfocus.com/bid/6512
http://www.iss.net/security_center/static/10988.php
http://www.debian.org/security/2003/dsa-228
http://marc.info/?l=bugtraq&m=104188513728573&w=2
http://marc.info/?l=bugtraq&m=104162752401212&w=2
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000567