Advisory Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of INVT VT-Designer. 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 handling of CArchive objects. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the current process.

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

07/26/18 - ZDI reported the vulnerability to ICS-CERT
11/21/18 - ZDI contacted ICS-CERT requesting a status update
11/21/18 - ICS-CERT indicated that the issue was pending disclosure until the vendor confirmed the right recipient
11/21/18 - ZDI notified ICS-CERT the case will 0-day on November 26

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

• 2018-07-26 - Vulnerability reported to vendor
• 2018-11-26 - Coordinated public release of advisory
• 2018-11-29 - Advisory Updated