Advisory Details

August 5th, 2019

Advantech WebAccess HMI Designer MCR File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-19-691
ZDI-CAN-7805

CVE ID CVE-2019-10961
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Advantech
AFFECTED PRODUCTS WebAccess
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess HMI 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 processing of MCR files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Advantech has issued an update to correct this vulnerability. More details can be found at:
https://www.us-cert.gov/ics/advisories/icsa-19-213-01
DISCLOSURE TIMELINE
  • 2019-01-15 - Vulnerability reported to vendor
  • 2019-08-05 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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