CVE-2020-12009 — A specially crafted communication packet sent to the affected device could cause

A specially crafted communication packet sent to the affected device could cause a denial-of-service condition due to a deserialization vulnerability. This affects: Mitsubishi Electric MC Works64 Version 4.02C (10.95.208.31) and earlier, all versions; Mitsubishi Electric MC Works

01What is this vulnerability?

A specially crafted communication packet sent to the affected device could cause a denial-of-service condition due to a deserialization vulnerability. This affects: Mitsubishi Electric MC Works64 Version 4.02C (10.95.208.31) and earlier, all versions; Mitsubishi Electric MC Works32 Version 3.00A (9.50.255.02); ICONICS GenBroker64, Platform Services, Workbench, FrameWorX Server v10.96 and prior…

02Affected products

Vendor	Product	Versions
Mitsubishi Electric	MC Works64	4.02C (10.95.208.31) and earlier, all versions
Mitsubishi Electric	MC Works32	Version 3.00A (9.50.255.02)
ICONICS	GenBroker64, Platform Services, Workbench, FrameWorX Server	v10.96 and prior
ICONICS	GenBroker32	v9.5 and prior

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: 2020-07-16T19:39:24.072Z
• Last modified: 2024-09-16T23:00:29.508Z

09References

• us-cert.cisa.gov — https://us-cert.cisa.gov/ics/advisories/icsa-20-170-02
• us-cert.cisa.gov — https://us-cert.cisa.gov/ics/advisories/icsa-20-170-03