Advisory Details

February 26th, 2021

Fatek Automation FvDesigner FPJ File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-21-260
ZDI-CAN-11999

CVE ID CVE-2021-22666
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Fatek Automation
AFFECTED PRODUCTS FvDesigner
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Fatek Automation FvDesigner. 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 FPJ 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 stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Fatek Automation has issued an update to correct this vulnerability. More details can be found at:
https://us-cert.cisa.gov/ics/advisories/icsa-21-056-02
DISCLOSURE TIMELINE
  • 2020-10-23 - Vulnerability reported to vendor
  • 2021-02-26 - Coordinated public release of advisory
CREDIT Francis Provencher {PRL}
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