CVE-2022-31804
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe CODESYS Gateway Server V2 does not verifiy that the size of a request is within expected limits. An unauthenticated attacker may allocate an arbitrary amount of memory, which may lead to a crash of the Gateway due to an out-of-memory condition.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceCODESYS Gateway Server V2 fails to validate the size of incoming requests before allocating memory, allowing unauthenticated attackers to send specially crafted requests that cause excessive memory allocation and potentially crash the service via out-of-memory conditions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 2.0, < 2.3.9.38CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify CODESYS Gateway Server V2 installationLocate the CODESYS Gateway Server V2 installation directory or check installed programs list on the systemAffected if CODESYS Gateway Server V2 software is present on the system
-
Determine installed versionUse the product's version information dialog, check the executable file properties, or run the Gateway Server with version flag if availableAffected if The version returned is >= 2.0 and < 2.3.9.38
-
Verify Gateway Server is runningCheck if the Gateway Server service or process is currently active on the systemAffected if The Gateway Server process is running and listening for network requests
-
Assess network exposureReview network configuration to determine if the Gateway Server port is accessible from untrusted or external network segmentsAffected if The Gateway Server port is exposed to networks without authentication or rate limiting controls
The environment is affected if CODESYS Gateway Server V2 is installed with version 2.0 or higher but lower than 2.3.9.38, and the service is running and reachable on the network.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2.3.9.38
Isolate the Gateway Server on a restricted network segment and apply vendor patches when available. Implement network-level rate limiting or firewall rules to limit exposure to unauthenticated requests.
2.3.9.38 or later
- 1. Download the CODESYS Gateway Server V2 version 2.3.9.38 or later from the official CODESYS customer portal (customers.codesys.com)
- 2. Stop the CODESYS Gateway Server service on the target system
- 3. Back up the current Gateway configuration files and installation directory
- 4. Install the updated Gateway Server version 2.3.9.38 or newer
- 5. Restore the backed-up configuration files if necessary
- 6. Start the CODESYS Gateway Server service
- 7. Verify the Gateway is running correctly and the version has been updated
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-31804 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-31804 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data