The IOS FTP Server in Cisco IOS 11.3 through 12.4 allows remote authenticated users to cause a denial of service (IOS reload) via unspecified vectors involving transferring files (aka bug ID CSCse29244).
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5444
https://exchange.xforce.ibmcloud.com/vulnerabilities/34196
http://www.vupen.com/english/advisories/2007/1749
http://www.securitytracker.com/id?1018030
http://www.securityfocus.com/bid/23885
http://www.cisco.com/en/US/products/products_security_advisory09186a00808399d0.shtml