Advisory Details

This vulnerability allows remote attackers to disclose information on vulnerable installations of Proface GP-Pro EX. 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 BeginPreRead processing. When handling malformed 0x7f77 type fields, it is possible for an attacker to force an out-of-bounds read. An attacker can leverage this vulnerability to disclose arbitrary memory.

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

06/25/2015 - ZDI disclosed 4 cases to ICS-CERT
06/25/2015 - ICS-CERT acknowledged and provided the ZDI an ICS-VU#
10/03/2015 - ZDI asked for an update from ICS-CERT and reminded of the 10/23/2015 due date, asking if a short extension was needed
There was no reply but ZDI granted an extension for the cases.
12/09/2015 - ZDI wrote to ICS-CERT to ask the status and notify of the intent to 0-day the reports at EOY

-- Mitigation:

Given the stated purpose of Proface GP-Pro, and the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the application to trusted files.

-- Vendor Response Link:

http://www.schneider-electric.com/ww/en/download/document/SEVD-2016-074-01

• 2015-06-25 - Vulnerability reported to vendor
• 2016-01-08 - Coordinated public release of advisory