IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server programs by appending "%3F+.htr" to the requested URL, which causes the files to be parsed by the .HTR ISAPI extension, aka a variant of the "File Fragment Reading via .HTR" vulnerability.
| Software | From | Fixed in |
|---|---|---|
| microsoft / internet_information_services | 5.0 | 5.0.x |
| microsoft / internet_information_server | 4.0 | 4.0.x |