File type not permitted or mime type does not match the file content

[mpmacconnell]

When trying to upload DLL files to the MID Server JAR Files section I am getting the following error:

I have already go to security and added the file extension. I have even check the option to turn off the MIME checking.

Anyone have any ideas?

[Allen Andreas]

Hi,

Please review this support article, in full (to include the bottom portion), to see if it helps with your issue: https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0718011

Please mark reply as Helpful/Correct, if applicable. Thanks!

[Geoff_T]

I encountered this problem and found the response (by Henrik Jutterström) in this thread very helpful:

https://community.servicenow.com/community?id=community_question&sys_id=513bf592db8f17c48e7c2926ca9619cd

Updating this property - glide.security.mime_type.extension_mapping

Means you shouldn't have to disable the MIME checking property you mention above.

[mpmacconnell · Accepted solution]

I finally found it. Apparently part of the hardening someone enabled the glide.attachment.blacklisted.extensions system property and DLL was listed there. Removed it from there and it let me upload.

[Akhila4]

along with the above property , check glide.attachment.blacklisted.types , need to remove the mime type file in this property as well.