CVE-2018-2433
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 Gateway (SAP KERNEL 32 NUC, SAP KERNEL 32 Unicode, SAP KERNEL 64 NUC, SAP KERNEL 64 Unicode 7.21, 7.21EXT, 7.22 and 7.22EXT; SAP KERNEL 7.21, 7.22, 7.45, 7.49 and 7.53) allows an attacker to prevent legitimate users from 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 · moderate confidenceSAP Gateway contains a denial-of-service vulnerability that allows remote attackers to disrupt service availability by either crashing the Gateway service or flooding it with requests, affecting multiple SAP Kernel versions (7.21-7.53).
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= 7.21= 7.21ext= 7.22= 7.22ext= 7.45= 7.49= 7.53CVSS 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:3.0/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 Kernel versionExecute 'sapkernel -version' or check the kernel directory for the version file (typically in /sapmnt/<SID>/exe or the kernel path defined in your SAP system). Compare the version number to the affected list: 7.21, 7.21ext, 7.22, 7.22ext, 7.45, 7.49, or 7.53.Affected if The installed kernel version matches exactly one of these versions: 7.21, 7.21ext, 7.22, 7.22ext, 7.45, 7.49, or 7.53.
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Confirm SAP Gateway component is activeCheck for running SAP Gateway processes using system commands (such as 'ps -ef | grep gw' on Unix or Task Manager on Windows) or by querying the SAP Message Server for gateway availability. Look for processes named 'gwrd' or check SMGW transaction in SAP.Affected if SAP Gateway processes are running on the system.
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Verify external gateway exposureReview SAP Gateway listener configuration in the SAP system profile (parameter 'gw/acl_mode' and 'gw/listen_port') and check network accessibility of the gateway port (typically 3300/tcp or as configured). Use netstat or similar tools to confirm the gateway is bound to accessible network interfaces.Affected if SAP Gateway is listening on externally accessible network interfaces (not localhost-only or firewalled).
You are affected if your SAP system runs Kernel version 7.21, 7.21ext, 7.22, 7.22ext, 7.45, 7.49, or 7.53 AND the SAP Gateway component is active 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.
From vendor dataApply the relevant SAP Security Note to patch the Gateway vulnerability and implement network-level rate limiting or filtering to mitigate flooding attempts.
- Consultation2.0 h
- Implementation4.0 h
- Testing4.0 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 $3,328.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-2433 — 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-2018-2433 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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