CVE-2023-6711 — Vulnerability exists in SCI IEC 60870-5-104 and HCI IEC 60870-5-104 that affects

Vulnerability exists in SCI IEC 60870-5-104 and HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Specially crafted messages sent to the mentioned components are not validated properly and can result in buffer overflow and as final consequence to a

01What is this vulnerability?

Vulnerability exists in SCI IEC 60870-5-104 and HCI IEC 60870-5-104 that affects the RTU500 series product versions listed below. Specially crafted messages sent to the mentioned components are not validated properly and can result in buffer overflow and as final consequence to a reboot of an RTU500 CMU.

02Affected products

Vendor	Product	Versions
Hitachi Energy	RTU500 series CMU Firmware	12.0.1, 12.2.1, 12.4.1, 12.6.1, 12.7.1, 13.2.1, 13.4.1, 13.5.1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-12-19T14:53:44.658Z
• Last modified: 2024-09-25T08:43:52.208Z

09References

• publisher.hitachienergy.com — https://publisher.hitachienergy.com/preview?DocumentId=8DBD000184&languageCode=e…