VulnerabilityModified

CVE-2022-2081

A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above.

HIGH 7.5EPSS 0.64%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.64%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above. If the HCI Modbus TCP is enabled and configured, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500 in a high rate, causing the targeted RTU500 CMU to reboot. The vulnerability is caused by a lack of flood control which eventually if exploited causes an internal stack overflow in the HCI Modbus TCP function.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.64% probability · 49th percentile
CISA KEV: Not listed
Weakness: CWE-787
Affected: hitachienergy/rtu520 firmware · hitachienergy/rtu530 firmware · hitachienergy/rtu540 firmware · hitachienergy/rtu560 firmware
Source: cybersecurity@hitachienergy.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.