CVE-2024-23811
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 · uneditedA vulnerability has been identified in SINEC NMS (All versions < V2.0 SP1). The affected application allows users to upload arbitrary files via TFTP. This could allow an attacker to upload malicious firmware images or other files, that could potentially lead to remote code execution.
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 · high confidenceSINEC NMS versions prior to V2.0 SP1 contain a file upload vulnerability in the TFTP service that allows arbitrary files to be uploaded. An attacker could exploit this to upload malicious firmware images or other malicious files, potentially achieving remote code execution on the affected system.
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= 2.0CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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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Identify installed SINEC NMS versionLocate the SINEC NMS installation and check its version number. This is typically found in the application UI under 'About' or 'Help', or in the Windows 'Programs and Features' list where the full version (including SP level) is displayed.Affected if The installed version is either any version below 2.0 (such as 1.x) or exactly version 2.0 (without Service Pack 1).
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Verify TFTP service statusCheck whether the TFTP service component is enabled and running on the system hosting SINEC NMS. This can be verified through the Windows Services console (services.msc) or by checking if TFTP-related processes are active in Task Manager.Affected if The TFTP service is running or enabled on the affected system.
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Inspect TFTP service configurationExamine the TFTP service configuration files or settings within SINEC NMS to determine if file upload operations are unrestricted. Look for settings that control which files can be uploaded or whether authentication is required for TFTP operations.Affected if TFTP allows unauthenticated or unrestricted file uploads, or has write permissions enabled without proper validation.
A system is affected if it runs any SINEC NMS version prior to V2.0 SP1 and has the TFTP service enabled with unrestricted file upload capabilities.
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 · scoped2.0
Upgrade SINEC NMS to version V2.0 SP1 or later. If upgrade is not immediately possible, disable or restrict TFTP access and implement network segmentation to limit exposure.
SINEC NMS V2.0 SP1
- Identify the current installed version of SINEC NMS
- Download SINEC NMS V2.0 SP1 from the official Siemens support portal (cert-portal.siemens.com or siemens.com)
- Review the release notes and installation instructions for V2.0 SP1
- Perform a backup of the current SINEC NMS configuration and data
- Execute the upgrade to SINEC NMS V2.0 SP1 following the official installation guide
- Verify the upgrade was successful by checking the version number
- Test that the TFTP file upload functionality now properly validates and restricts file types
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-23811 — 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-2024-23811 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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