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White Wolf Labs #080826-1: Kyocera Mita Scanner File Utility (Multiple)



White Wolf Labs #080826-1:
Kyocera Mita Scanner File Utility (Multiple)

Product: Kyocera Mita Scanner File Utility 3.3.0.1

Platform: NA

Requirements: NA

Credits:

    Seth Fogie
    White Wolf Security
    http://www.whitewolfsecurity.com
    August 26, 2008

Risk Level:

High - Unauthorized document upload / File redirection / Uploading of binaries / Overwriting of existing files
Summary:

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.
Details:

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 
system.
    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:
http://www.informit.com/guides/content.aspx?g=security&seqNum=320
http://www.informit.com/guides/content.aspx?g=security&seqNum=321

MetaSploit module is located at: http://www.whitewolfsecurity.com/security/metasploit/fileutility.txt
Workaround: Uninstall the software from the PC/Mac.

Vendor Response: Vendor has released an update that fixes only the file redirection issue.
Copyright © 2008 White Wolf Security

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