automount in Mac OS X 10.4.5 and earlier allows remote file servers to cause a denial of service (unresponsiveness) or execute arbitrary code via unspecified vectors that cause automount to "mount file systems with reserved names".
https://exchange.xforce.ibmcloud.com/vulnerabilities/25021
http://www.vupen.com/english/advisories/2006/0791
http://www.us-cert.gov/cas/techalerts/TA06-062A.html
http://www.securityfocus.com/bid/16907
http://securitytracker.com/id?1015709
http://secunia.com/advisories/19064
http://lists.apple.com/archives/security-announce/2006/Mar/msg00000.html