CVE-2023-5768

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-04 · updated 2026-06-17
Weakness: CWE-79

Description

A vulnerability exists in the HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Incomplete or wrong received APDU frame layout may cause blocking on link layer. Error reason was an endless blocking when reading incoming frames on link layer with wrong length information of APDU or delayed reception of data octets. Only communication link of affected HCI IEC 60870-5-104 is blocked. If attack sequence stops the communication to the previously attacked link gets normal again.

Affected products

Hitachienergy Rtu520 Firmware: from 12.0.1 through 12.0.14; from 12.2.1 through 12.2.11; from 12.4.1 through 12.4.11; from 12.6.1 through 12.6.9; from 12.7.1 through 12.7.6; from 13.2.1 through 13.2.6
Hitachienergy Rtu530 Firmware: from 12.0.1 through 12.0.14; from 12.2.1 through 12.2.11; from 12.4.1 through 12.4.11; from 12.6.1 through 12.6.9; from 12.7.1 through 12.7.6; from 13.2.1 through 13.2.6
Hitachienergy Rtu540 Firmware: from 12.0.1 through 12.0.14; from 12.2.1 through 12.2.11; from 12.4.1 through 12.4.11; from 12.6.1 through 12.6.9; from 12.7.1 through 12.7.6; from 13.2.1 through 13.2.6
Hitachienergy Rtu560 Firmware: from 12.0.1 through 12.0.14; from 12.2.1 through 12.2.11; from 12.4.1 through 12.4.11; from 12.6.1 through 12.6.9; from 12.7.1 through 12.7.6; from 13.2.1 through 13.2.6

References

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