Directory traversal vulnerability in the AVM IGD CTRL Service in Fritz!DSL 02.02.29 allows remote attackers to read arbitrary files via ..%5C (URL-encoded dot dot backslash) sequences in a URI requested from the AR7 webserver.
https://exchange.xforce.ibmcloud.com/vulnerabilities/31556
http://www.vupen.com/english/advisories/2007/0236
http://www.securityfocus.com/bid/22093
http://securityreason.com/securityalert/2159
http://secunia.com/advisories/23774
http://lists.grok.org.uk/pipermail/full-disclosure/2007-January/051844.html