CVE-2018-16177
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 · uneditedUntrusted search path vulnerability in The installer of Windows 10 Fall Creators Update Modify module for Security Measures tool allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.
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 confidenceThis is a DLL hijacking/untrusted search path vulnerability in the Windows 10 Fall Creators Update Modify module installer for the Security Measures tool. The installer searches an unspecified directory that an attacker can control, allowing a malicious Trojan horse DLL to be loaded with elevated privileges during the installation process.
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 versionsCVSS 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
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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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Locate the Ntt West Fall Creators Update Security Measures installerSearch for installer executables related to Ntt West Fall Creators Update Security Measures tool on the system. Check common installation directories and download folders.Affected if The installer executable is present on the system and has not been patched.
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Identify the installer file versionRight-click the installer executable, select Properties, and examine the Version tab for file version and product version information.Affected if The installed version falls within the Ntt West Fall Creators Update range and has not been updated to include secure DLL search paths.
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Inspect the installer DLL search behaviorRun the installer while monitoring DLL loading using Process Monitor (filter by the installer process name), observe which directories the installer searches for DLLs.Affected if The installer loads DLLs from directories writable by non-privileged users or uncontrolled locations (untrusted search path).
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Verify DLL signature validationMonitor the installer process for DLL loading events and check whether loaded DLLs have valid digital signatures using sigcheck or similar tool.Affected if The installer loads DLLs without verifying signatures, allowing malicious DLLs to be loaded.
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Check for presence of vulnerable installerSearch for any executable files from Ntt West related to the Security Measures tool in Program Files, Program Files (x86), or user download directories.Affected if A vulnerable version of the installer exists on the system and can be executed.
The environment is affected if the Ntt West Fall Creators Update Security Measures installer with the untrusted DLL search path vulnerability is present and executable 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 dataUsers should only obtain this installer from official Microsoft sources and ensure they are running patched versions. The vendor fix requires modifying the installer to use secure DLL search paths (e.g., specifying full paths to DLLs or enabling SafeDllSearchMode) and validating DLL signatures before loading.
- Consultation3.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-16177 — 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-2018-16177 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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