CVE-2016-4831
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 LINE and LINE Installer 4.7.0 and earlier on Windows allows local users 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 · high confidenceUntrusted search path vulnerability in LINE and LINE Installer 4.7.0 and earlier on Windows allows the application to load DLLs from insecure locations. A local attacker can place a malicious DLL in an unspecified directory that LINE will load, resulting in privilege escalation.
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<= 4.7.0<= 4.7.0CVSS 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
- 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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Check LINE application versionOpen the LINE application, go to Settings > About LINE, or right-click the LINE executable and select Properties > Details to view the File VersionAffected if Version displayed is 4.7.0 or earlier
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Check LINE Installer versionOpen Programs and Features (or Add or Remove Programs), find LINE or LINE Installer, and note the version shownAffected if Version displayed is 4.7.0 or earlier
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Identify LINE executable locationLocate the LINE executable (LINE.exe) on the system using File Explorer search or command: where /r C:\ LINE.exeAffected if Executable exists and version cannot be determined or is confirmed <= 4.7.0
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Check for suspicious DLLs in application directoryExamine the folder containing LINE.exe for any unexpected or recently added DLL files, particularly in the same directory as the executableAffected if Unknown or unexpected DLL files are present in the application directory that were not shipped with the official installer
A system is affected if LINE or LINE Installer version 4.7.0 or earlier is installed, as this version contains the untrusted DLL search path vulnerability that could allow loading of malicious DLLs placed in insecure locations.
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 LINE and LINE Installer to version 4.8.0 or later, which contains the patched version. Additionally, remove untrusted directories from the DLL search path and ensure the application uses secure DLL loading (e.g., SetDllDirectory, LoadLibraryEx with full paths).
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-4831 — 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-2016-4831 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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