Advisory Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Delta Industrial Automation WPLSoft. 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 parsing of DVP files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current process.

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

02/01/17 - ZDI disclosed reports to ICS-CERT
02/07/17 - ICS-CERT provided ZDI with an ICS-VU # ICS-VU-974568
03/16/17 - ICS-CERT asked ZDI questions about reproduction
03/27/17 - ICS-CERT asked ZDI again some questions about reproduction
06/07/17 - ICS-CERT offered ZDI a pre-release patch to test
06/07/17 - ZDI replied that we cannot do the testing for the vendor
07/20/17 - ZDI sent a mail to ICS-CERT asking the status
07/26/17 - ICS-CERT advised that the vendor has a new version they believe addressed the reports (though to ZDI knowledge, no advisory was released)
08/02/17 - ZDI advised ICS-CERT that our finder indicated that the vulnerabilities are still present
08/11/17 - ZDI wrote ICS-CERT to indicate the intention to move these reports to 0-day on 8/24

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

• 2017-02-01 - Vulnerability reported to vendor
• 2017-08-24 - Coordinated public release of advisory
• 2018-03-28 - Advisory Updated