download.aspx in Douran Portal 3.9.7.8 allows remote attackers to obtain source code of arbitrary files under the web root via (1) a trailing ".", (2) a trailing space, or (3) mixed case in the FileNameAttach parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/66177
http://www.securityfocus.com/archive/1/517085/100/0/threaded
http://soroush.secproject.com/blog/2011/01/unrestricted_file_download_v1_0/
http://securityreason.com/securityalert/8180