CVE-2018-11465
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 SINUMERIK 808D V4.7 (All versions), SINUMERIK 808D V4.8 (All versions), SINUMERIK 828D V4.7 (All versions < V4.7 SP6 HF1), SINUMERIK 840D sl V4.7 (All versions < V4.7 SP6 HF5), SINUMERIK 840D sl V4.8 (All versions < V4.8 SP3). A local attacker could use ioctl calls to do out of bounds reads, arbitrary writes, or execute code in kernel mode. The security vulnerability could be exploited by an attacker with local access to the affected systems. Successful exploitation requires user privileges but no user interaction. The vulnerability could allow an attacker to compromise confidentiality, integrity and availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known.
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 confidenceA local privilege escalation vulnerability in Siemens SINUMERIK CNC systems allows attackers with local user access to use ioctl calls for out-of-bounds reads, arbitrary kernel-mode writes, or code execution. Successful exploitation compromises system confidentiality, integrity, and availability.
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 dataall versionsall versions<= 4.7<= 4.7<= 4.8CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:L/AC:L/PR:L/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 the SINUMERIK CNC modelAccess the system HMI or boot screen to confirm whether the system is a Sinumerik 808D, 828D, or 840D sl model. This is typically visible in the system diagnostics or startup screen.Affected if The model is not one of the three affected models (808D, 828D, or 840D sl)
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Determine the firmware versionNavigate to the system information or diagnostics menu on the SINUMERIK HMI to retrieve the installed firmware version. The version is typically shown as V4.7 or V4.8 with additional Service Pack (SP) and Hotfix (HF) information.Affected if Unable to retrieve version information from the CNC system interface
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Compare version against affected rangesFor Sinumerik 808D V4.7 or V4.8: all versions are affected. For Sinumerik 828D V4.7: version 4.7 (without SP6 HF1 or later) is affected. For Sinumerik 840D sl V4.7: version 4.7 (without SP6 HF5 or later) is affected. For Sinumerik 840D sl V4.8: version 4.8 (without SP3 or later) is affected.Affected if The installed version falls within: 808D V4.7 (all), 808D V4.8 (all), 828D V4.7 <= 4.7, 840D sl V4.7 <= 4.7, or 840D sl V4.8 <= 4.8
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Verify local user access is presentConfirm that local user accounts exist on the system with the ability to execute ioctl calls. This is typically a standard condition for operator-level access on SINUMERIK systems.Affected if Local user access exists on the system (this is required for exploitation)
A system is affected if it is a Sinumerik 808D, 828D, or 840D sl running firmware versions within the affected ranges listed above and local user accounts are present on the system.
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 dataUpdate affected SINUMERIK 808D, 828D, and 840D sl systems to the patched versions (V4.7 SP6 HF1 or later for 828D, V4.7 SP6 HF5 or later for 840D sl V4.7, V4.8 SP3 or later for 840D sl V4.8).
- Consultation6.0 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-2018-11465 — 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-2018-11465 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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