c32web.exe in McMurtrey/Whitaker Cart32 before 6.4 allows remote attackers to read arbitrary files via the ImageName parameter in a GetImage action, by appending a NULL byte (%00) sequence followed by an image file extension, as demonstrated by a request for a ".txt%00.gif" file. NOTE: this might be a directory traversal vulnerability.
https://www.exploit-db.com/exploits/30639/
https://exchange.xforce.ibmcloud.com/vulnerabilities/36954
http://www.securityfocus.com/bid/25928
http://www.securityfocus.com/archive/1/481489/100/0/threaded
http://www.security-assessment.com/files/advisories/2007-10-04_Cart32_Arbitrary_File_Download.pdf
http://www.cart32.com/whatsnew.asp
http://securityreason.com/securityalert/3194