CVE-2010-4742
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 a certain ActiveX control in MediaDBPlayback.DLL 2.2.0.5 in the Moxa ActiveX SDK allows remote attackers to execute arbitrary code via a long PlayFileName property value.
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 stack-based buffer overflow vulnerability exists in the MediaDBPlayback.DLL ActiveX control (version 2.2.0.5) from the Moxa ActiveX SDK. The vulnerability stems from insufficient bounds checking on the PlayFileName property, allowing remote attackers to inject and execute arbitrary code by supplying an overly long string value.
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
- 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.
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Locate MediaDBPlayback.DLL on the systemSearch for MediaDBPlayback.DLL in common directories: C:\Windows\System32\, C:\Windows\SysWOW64\, or within Moxa SDK installation folders. Use File Explorer search or command: dir /s C:\MediaDBPlayback.DLLAffected if The file MediaDBPlayback.DLL exists on the system
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Verify the DLL versionRight-click the DLL file, select Properties, then view the Details tab to read the File Version. Alternatively, use PowerShell: (Get-Item 'C:\path\to\MediaDBPlayback.DLL').VersionInfo.FileVersionAffected if The file version matches 2.2.0.5 or the DLL is from any version of Moxa ActiveX SDK (all versions are affected)
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Check if the ActiveX control is registeredOpen Windows Registry and search for the CLSID associated with MediaDBPlayback.DLL. The control is typically registered under HKLM\SOFTWARE\Microsoft\Code Store Database\SpecificFolders\{CLSID} or HKCU\Software\Microsoft\Windows\CurrentVersion\Ext\Stats. Alternatively, check for entries containing 'MediaDBPlayback' in HKCR\CLSIDAffected if The ActiveX control is registered in the Windows registry
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Determine if the control is allowed to run in Internet ExplorerCheck the Internet Explorer add-on list: Open IE, go to Manage Add-ons, look for 'MediaDBPlayback' or 'Moxa ActiveX SDK' in the list. Also check registry kill bit: HKLM\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{CLSID} where CLSID is the control's class identifierAffected if The control appears in IE add-ons as enabled, or the kill bit is not set in the registry
If MediaDBPlayback.DLL is present and registered as an enabled ActiveX control in Internet Explorer, the system is vulnerable to CVE-2010-4742 through the PlayFileName property buffer overflow.
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 dataDisable the vulnerable Moxa ActiveX control in Internet Explorer or deploy the Microsoft Kill Bit for this ActiveX control to prevent instantiation. If the SDK is in use, contact Moxa for an updated version with proper input validation on the PlayFileName property.
- Consultation2.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2010-4742 — 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-2010-4742 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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