{ "CVE_data_meta" : { "ASSIGNER" : "cve@mitre.org", "ID" : "CVE-2009-4444", "STATE" : "PUBLIC" }, "affects" : { "vendor" : { "vendor_data" : [ { "product" : { "product_data" : [ { "product_name" : "n/a", "version" : { "version_data" : [ { "version_value" : "n/a" } ] } } ] }, "vendor_name" : "n/a" } ] } }, "data_format" : "MITRE", "data_type" : "CVE", "data_version" : "4.0", "description" : { "description_data" : [ { "lang" : "eng", "value" : "Microsoft Internet Information Services (IIS) 5.x and 6.x uses only the portion of a filename before a ; (semicolon) character to determine the file extension, which allows remote attackers to bypass intended extension restrictions of third-party upload applications via a filename with a (1) .asp, (2) .cer, or (3) .asa first extension, followed by a semicolon and a safe extension, as demonstrated by the use of asp.dll to handle a .asp;.jpg file." } ] }, "problemtype" : { "problemtype_data" : [ { "description" : [ { "lang" : "eng", "value" : "n/a" } ] } ] }, "references" : { "reference_data" : [ { "name" : "http://blogs.technet.com/msrc/archive/2009/12/27/new-reports-of-a-vulnerability-in-iis.aspx", "refsource" : "MISC", "url" : "http://blogs.technet.com/msrc/archive/2009/12/27/new-reports-of-a-vulnerability-in-iis.aspx" }, { "name" : "http://soroush.secproject.com/downloadable/iis-semicolon-report.pdf", "refsource" : "MISC", "url" : "http://soroush.secproject.com/downloadable/iis-semicolon-report.pdf" }, { "name" : "37460", "refsource" : "BID", "url" : "http://www.securityfocus.com/bid/37460" }, { "name" : "1023387", "refsource" : "SECTRACK", "url" : "http://securitytracker.com/id?1023387" }, { "name" : "37831", "refsource" : "SECUNIA", "url" : "http://secunia.com/advisories/37831" }, { "name" : "ADV-2009-3634", "refsource" : "VUPEN", "url" : "http://www.vupen.com/english/advisories/2009/3634" } ] } }