An issue was discovered in Cinnamon kotaemon 0.11.0. The _may_extract_zip function in the libsktemktemindexfileui.py file does not check the contents of uploaded ZIP files. Although the contents are extracted into a temporary folder that is cleared before each extraction, successfully uploading a ZIP bomb could still cause the server to consume excessive resources during decompression. Moreover, if no further files are uploaded afterward, the extracted data could occupy disk space and potentially render the system unavailable. Anyone with permission to upload files can carry out this attack.
The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.