CVE-2020-25237
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 < V1.0 SP1 Update 1), SINEMA Server (All versions < V14.0 SP2 Update 2). When uploading files to an affected system using a zip container, the system does not correctly check if the relative file path of the extracted files is still within the intended target directory. With this an attacker could create or overwrite arbitrary files on an affected system. This type of vulnerability is also known as 'Zip-Slip'. (ZDI-CAN-12054)
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 confidenceThis is a Zip-Slip vulnerability (directory traversal) in SINEC NMS and SINEMA Server file upload functionality. When processing zip archives, the system fails to validate that extracted file paths remain within the intended target directory, allowing attackers to use '../' path traversal sequences in filenames to write files to arbitrary locations on the 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< 1.0= 1.0< 14.0= 14.0CVSS 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
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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 the installed productDetermine whether the system has Siemens SINEC Network Management System or Siemens SINEMA Server installed. Check installed programs, services, or documentation that lists the deployed Siemens management software.Affected if The system has either SINEC NMS or SINEMA Server installed and the version is unpatched
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Determine the installed version of SINEC NMSUse the system's software inventory or version check mechanism to obtain the exact version number of SINEC Network Management System. Compare against the affected range: versions < 1.0 and version 1.0.Affected if The installed version is 1.0 or earlier (less than 1.0 or exactly 1.0)
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Determine the installed version of SINEMA ServerUse the system's software inventory or version check mechanism to obtain the exact version number of SINEMA Server. Compare against the affected range: versions < 14.0 and version 14.0.Affected if The installed version is 14.0 or earlier (less than 14.0 or exactly 14.0)
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Verify file upload feature accessibilityDetermine whether the web-based file upload functionality in the management interface is exposed and accessible to users. This may involve checking web server configurations, service bindings, or access control settings.Affected if The file upload interface is exposed and users with upload permissions can submit files to the system
A user is affected if the system runs SINEC NMS version 1.0 or earlier, or SINEMA Server version 14.0 or earlier, AND the file upload feature is accessible to authenticated users.
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.
From vendor data1.014.0
Update to SINEC NMS V1.0 SP1 Update 1 or SINEMA Server V14.0 SP2 Update 2. Until patched, disable or restrict zip file upload functionality where possible.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-25237 — 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-2020-25237 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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