White Wolf Labs #080826-1:
Kyocera Mita Scanner File Utility (Multiple)
Product: Kyocera Mita Scanner File Utility 18.104.22.168
White Wolf Security
August 26, 2008
High - Unauthorized document upload / File redirection / Uploading
of binaries / Overwriting of existing files
Kyocera Mita multifunction devices come with the ability to scan to
the user's desktop. Part of the solution requires a listener at the
PC/Mac, which handles authorization and document upload. This listener
has several logic bugs and, as a result, the authorization can be
bypassed, files can be uploaded, auditing can be spoofed, and the
storage location can be altered from the configured value.
Unauthorized document upload - The listener works in conjunction
with the multifunction device to authorize the user. If an attacker
connects direct to the listener with a custom program, all authorization
can be bypassed. This provides an attacker with the ability to directly
upload a file to the target's computer.
File Redirection - During the transfer process, the file name is
provided to the listener. This name can be altered to include "../",
which causes the listener to break out of the specified file storage
location and allows an attacker to upload a file anywhere on the target
Upload any file type - There are no checks in the listener to
validate the content of the uploaded file. As a result, an attacker can
upload any file type with any file name. When combined with the other
bugs, this give the attacker the ability to overwrite existing files, or
write a binary into the Startup Folder.
More details are located at:
MetaSploit module is located at:
Workaround: Uninstall the software from the PC/Mac.
Vendor Response: Vendor has released an update that fixes only the file
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