Advisory Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Fuji Electric Alpha Loader. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the processing of C5V files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length, heap-based buffer. An attacker can leverage this vulnerability to execute arbitrary code under the context of an administrator.

This vulnerability is being disclosed publicly without a patch in accordance with the ZDI 120 day deadline.

05/19/18 - ZDI reported the vulnerability to ICS-CERT
09/19/18 - ZDI asked ICS-CERT for a status update
09/19/18 - ICS-CERT notified ZDI that the vendor has budgeted for and is working on a fix, but does not yet have any ETA
09/21/18 - ZDI notified ICS-CERT of the intent to disclose the report as an 0-day advisory on 9/26

-- Mitigation:
Given the nature of the vulnerability the only salient mitigation strategy is to restrict interaction with the application to trusted files.

• 2018-05-22 - Vulnerability reported to vendor
• 2018-09-26 - Coordinated public release of advisory
• 2018-09-26 - Advisory Updated