CVE-2017-9844
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 · uneditedSAP NetWeaver 7400.12.21.30308 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted serialized Java object in a request to metadatauploader, aka SAP Security Note 2399804. NOTE: The vendor states that the devserver package of Visual Composer deserializes a malicious object that may cause legitimate users accessing a service, either by crashing or flooding the service.
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 Java deserialization vulnerability in SAP NetWeaver's Visual Composer devserver package. The metadatauploader endpoint insecurely deserializes incoming Java objects, allowing remote unauthenticated attackers to send crafted serialized Java objects that can crash the service (DoS) or potentially achieve arbitrary code execution.
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= 7400.12.21.30308CVSS 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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Identify SAP NetWeaver installationCheck system for SAP NetWeaver components by reviewing installed software packages, or query the SAP system for version information using SAP transaction SM51 or the SAP NetWeaver Administrator console.Affected if SAP NetWeaver is installed and running.
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Verify the exact NetWeaver versionQuery the SAP system for the precise version number. Use SAP transaction code SM51 to display release and version information, or check the SAP NetWeaver Administrator for the installed version string.Affected if The installed version matches 7400.12.21.30308 exactly.
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Confirm Visual Composer devserver is enabledCheck the SAP NetWeaver configuration to determine if the Visual Composer devserver component is installed and active. This can be verified through the SAP NetWeaver Administrator or by reviewing the Visual Composer deployment configuration files.Affected if The Visual Composer devserver component is enabled or installed.
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Test metadatauploader endpoint accessibilityAttempt to access the metadatauploader endpoint on the Visual Composer devserver. This is typically found at a URL path containing /metadatauploader or similar under the Visual Composer context. Check if the endpoint responds to HTTP requests.Affected if The metadatauploader endpoint is reachable over the network without authentication.
A user is affected if they are running SAP NetWeaver version 7400.12.21.30308 with the Visual Composer devserver and its metadatauploader endpoint enabled and accessible.
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 dataApply SAP Security Note 2399804 (or subsequent patches), or disable the vulnerable Visual Composer devserver/metadatauploader component if not required in production. Network segmentation can limit exposure to untrusted users.
- Consultation8.0 h
- Implementation4.0 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-2017-9844 — 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-2017-9844 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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