CVE-2010-4394
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 · uneditedHeap-based buffer overflow in RealNetworks RealPlayer 11.0 through 11.1 and RealPlayer SP 1.0 through 1.1.5 allows remote web servers to execute arbitrary code via a long Server header in a response to an HTTP request that occurs during parsing of a RealPix file.
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 confidenceHeap-based buffer overflow in RealPlayer when parsing RealPix files. The vulnerability is triggered by a long Server header in an HTTP response during RealPix file parsing, allowing remote code execution.
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= 11.0= 11.0.1= 11.0.2= 11.0.3= 11.0.4= 11.0.5= 11.1= 1.0.0= 1.0.1= 1.0.2= 1.0.5= 1.1= 1.1.1= 1.1.2= 1.1.3= 1.1.4= 1.1.5CVSS 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
- M
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:N/AC:M/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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Identify RealPlayer installationCheck for installed RealPlayer and its version number (typically in Add/Remove Programs on Windows or the application info on Mac)Affected if The installed version matches RealPlayer 11.0 through 11.1 or RealPlayer SP 1.0.0 through 1.1.5
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Confirm RealPix parsing capabilityVerify that RealPix file format parsing is enabled in the RealPlayer media handling settingsAffected if RealPix parsing is enabled and the application processes RealPix (.rp) files
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Assess HTTP response handlingDetermine whether RealPlayer is configured to fetch media via HTTP from remote servers, as the vulnerability is triggered during HTTP response processing for RealPix filesAffected if HTTP streaming or retrieval of RealPix files from remote servers is enabled
A user is affected if they have a vulnerable RealPlayer version (11.0-11.1 or SP 1.0.0-1.1.5), RealPix parsing is enabled, and the application fetches RealPix content via HTTP where a malicious server could send an oversized Server header
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 to a patched version of RealPlayer beyond 11.1/1.1.5, or disable automatic RealPix file parsing and block HTTP responses with unusually long Server headers.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2010-4394 — 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-2010-4394 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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