VulnerabilityModified

CVE-2022-2502

A vulnerability exists in the HCI IEC 60870-5-104 function included in certain versions of the RTU500 series product.

HIGH 7.5EPSS 0.65%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.65%). 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 IEC 60870-5-104 function included in certain versions of the RTU500 series product. The vulnerability can only be exploited, if the HCI 60870-5-104 is configured with support for IEC 62351-5 and the CMU contains the license feature ‘Advanced security’ which must be ordered separately. If these preconditions are fulfilled, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500, causing the targeted RTU500 CMU to reboot. The vulnerability is caused by a missing input data validation which eventually if exploited causes an internal buffer to overflow in the HCI IEC 60870-5-104 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: 0.65% probability · 49th percentile
CISA KEV: Not listed
Weakness: CWE-20
Affected: hitachienergy/rtu500 firmware
Source: cybersecurity@hitachienergy.com

References

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