Directory traversal vulnerability in DirHandler (lib/mongrel/handlers.rb) in Mongrel 1.0.4 and 1.1.x before 1.1.3 allows remote attackers to read arbitrary files via an HTTP request containing double-encoded sequences (".%252e").
http://www.vupen.com/english/advisories/2008/1697
http://www.us-cert.gov/cas/techalerts/TA08-150A.html
http://www.securityfocus.com/bid/27133
http://secunia.com/advisories/30430
http://secunia.com/advisories/28323
http://rubyforge.org/pipermail/mongrel-users/2007-December/004743.html
http://rubyforge.org/pipermail/mongrel-users/2007-December/004742.html
http://mongrel.rubyforge.org/news.html
http://lists.apple.com/archives/security-announce/2008//May/msg00001.html