Advisory Details

February 16th, 2022

Omron CX-One FLN File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-22-374
ZDI-CAN-14204

CVE ID CVE-2022-21137
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Omron
AFFECTED PRODUCTS CX-One
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Omron CX-One. 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 FLN files in the CX-FLnet module. 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 Omron has issued an update to correct this vulnerability. More details can be found at:
https://www.cisa.gov/uscert/ics/advisories/icsa-22-006-01
DISCLOSURE TIMELINE
  • 2021-07-20 - Vulnerability reported to vendor
  • 2022-02-16 - Coordinated public release of advisory
CREDIT xina1i
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