Advisory Details

February 26th, 2021

Fatek Automation FvDesigner FPJ File Parsing Out-Of-Bounds Read Remote Code Execution Vulnerability

ZDI-21-255
ZDI-CAN-11802

CVE ID CVE-2021-22638
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 user-supplied data, which can result in a read past the end of an allocated data structure. 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
  • 2020-09-02 - Vulnerability reported to vendor
  • 2021-02-26 - Coordinated public release of advisory
CREDIT rgod
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