CVE-2022-30551 — OPC UA Legacy Java Stack 2022-04-01 allows a remote attacker to cause a server t

OPC UA Legacy Java Stack 2022-04-01 allows a remote attacker to cause a server to stop processing messages by sending crafted messages that exhaust available resources.

01What is this vulnerability?

OPC UA Legacy Java Stack 2022-04-01 allows a remote attacker to cause a server to stop processing messages by sending crafted messages that exhaust available resources.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

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: 2022-05-20T11:19:40.000Z
• Last modified: 2024-08-03T06:48:36.389Z

09References

• opcfoundation.org — https://opcfoundation.org
• github.com — https://github.com/OPCFoundation/UA-Java-Legacy
• files.opcfoundation.org — https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20…