CVE-2023-41185
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 · uneditedUnified Automation UaGateway Certificate Parsing Integer Overflow Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of client certificates. When parsing the certificate length field, the process does not properly validate user-supplied data, which can result in an integer overflow. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20353.
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 confidenceUnified Automation UaGateway contains an integer overflow vulnerability in its client certificate parsing logic. The application fails to properly validate the certificate length field when processing client certificates, allowing a remote attacker to trigger an integer overflow that causes a denial-of-service condition without authentication.
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< 1.5.13.487CVSS 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.
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Verify UaGateway installation existsLocate the UaGateway application installation directory or check system services for the presence of UaGateway. Common installation paths may include C:\Program Files\Unified Automation\UaGateway or /opt/uagateway depending on your operating system.Affected if UaGateway is installed on the system
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Determine installed UaGateway versionCheck the application version through its main executable properties, about dialog, or version information file. The version is typically displayed in the application GUI under Help > About, or can be retrieved by running uagateway -v from the command line if supported.Affected if The installed version cannot be determined or is older than 1.5.13.487
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Compare version to affected rangeCompare the discovered version number against the affected range: versions prior to 1.5.13.487 are vulnerable. If your version is 1.5.13.487 or higher, the vulnerability has been patched.Affected if Installed version is less than 1.5.13.487
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Confirm client certificate authentication is enabledExamine the UaGateway configuration settings to determine whether client certificate authentication is enabled. This is typically configured in the security or authentication settings panel of the UaGateway management interface, or in the configuration XML file.Affected if Client certificate authentication is enabled and the installed version is below 1.5.13.487
You are affected if Unified Automation UaGateway is installed with a version prior to 1.5.13.487 and client certificate authentication is enabled, as this configuration triggers the vulnerable certificate parsing code path.
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 · scoped1.5.13.487
Apply vendor patches for CVE-2023-41185 when available. If no patch exists, consider network-level filtering of untrusted certificates and implement rate limiting on certificate processing endpoints to reduce exposure.
UaGateway version 1.5.13.487 or later
- Backup the current UaGateway configuration and data
- Download Unified Automation UaGateway version 1.5.13.487 or later from the official vendor website
- Stop the UaGateway service
- Install the updated version (1.5.13.487 or newer)
- Restart the UaGateway service
- Verify the service is running correctly and the vulnerability is resolved
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation6.0 h
- Testing5.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-41185 — 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-2023-41185 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
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- 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
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