CVE-2011-3142
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 · uneditedStack-based buffer overflow in an ActiveX control in KVWebSvr.dll in WellinTech KingView 6.52 and 6.53 allows remote attackers to execute arbitrary code via a long second argument to the ValidateUser method.
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 confidenceStack-based buffer overflow in the ValidateUser method of KVWebSvr.dll ActiveX control in WellinTech KingView 6.52 and 6.53 allows remote attackers to execute arbitrary code via a long second argument.
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= 6.52= 6.53CVSS 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
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:N/AC:L/Au:N/C:C/I:C/A:C
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.
-
Locate KingView installation directorySearch for KingView installation folders, typically in C:\Program Files\WellinTech\KingView or C:\Program Files (x86)\WellinTech\KingView. Check Program Files directories and common application locations.Affected if KingView is installed on the system
-
Identify installed KingView versionLocate version information in the KingView installation folder. Check for version.txt, a README file, or right-click on the main executable (usually KingView.exe) and select Properties > Details to view the File Version.Affected if The installed version is exactly 6.52 or exactly 6.53
-
Find KVWebSvr.dll fileSearch for KVWebSvr.dll within the KingView installation directory and subfolders. The DLL is typically located in the web or bin subdirectory of the KingView installation.Affected if KVWebSvr.dll exists in the KingView installation folder
-
Check if vulnerable ActiveX control is registeredOpen Windows Registry Editor and search for the CLSID associated with KVWebSvr.dll, or check for the presence of the ActiveX control registration in HKEY_CLASSES_ROOT\CLSID. The control may also be listed in Internet Explorer Add-ons if IE is used.Affected if The KVWebSvr.dll ActiveX control is registered and available for instantiation in web browsers or other COM consumers
The system is affected if KingView version 6.52 or 6.53 is installed AND the KVWebSvr.dll ActiveX control is present and registered 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 dataUpgrade KingView to a patched version if available; otherwise disable or remove the vulnerable KVWebSvr.dll ActiveX control and implement network segmentation to limit exposure to the vulnerability.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-3142 — 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-2011-3142 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data