We have a number of web sites that run ColdFusion that we have been migrating from Server 2003 to Server 2012 recently and have run into a problem with the ColdFusion code on one of the sites. We are investigating the code but since nothing has changed but the IIS version and Windows OS version, we are more suspicious it's a security issue within IIS.
The code uploads a graphic file to a directory in the site, verifies the file has successfully uploaded and then renames the file. This process worked perfectly in IIS6 on the 2003 server. Now that we've moved the site to IIS8, JPG files will still upload and rename as expected but GIF and PNG files fail on the rename.
The error we are seeing in the ColdFusion logs points to rights/permission issues on the destination object. Since JPG files don't exhibit this problem, it appears to be related to the file type rather than the file or folder rights. '
We would appreciate any suggestions you might have regarding this issue as we're currently stumped.