The wu_fnmatch function in wu_fnmatch.c in wu-ftpd 2.6.1 and 2.6.2 allows remote attackers to cause a denial of service (CPU exhaustion by recursion) via a glob pattern with a large number of * (wildcard) characters, as demonstrated using the dir command.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1762
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1333
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1265
http://www.vupen.com/english/advisories/2006/1271
http://www.vupen.com/english/advisories/2005/0588
http://www.debian.org/security/2005/dsa-705
http://sunsolve.sun.com/search/document.do?assetkey=1-26-57795-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-101699-1
http://secunia.com/advisories/19561
http://secunia.com/advisories/18210
http://secunia.com/advisories/14411
http://itrc.hp.com/service/cki/docDisplay.do?docId=c00637342