CVE-2007-1921
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 · uneditedLIBSNDFILE.DLL, as used by AOL Nullsoft Winamp 5.33 and possibly other products, allows remote attackers to execute arbitrary code via a crafted .MAT file that contains a value that is used as an offset, which triggers memory corruption.
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 confidenceMemory corruption vulnerability in libsndfile.dll allows remote code execution via crafted .MAT files containing malicious offset values that trigger heap or stack corruption when processed by the sound library.
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= 5.33CVSS 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 installed Winamp versionCheck the Winamp installation directory for version information. Look at the file properties of winamp.exe or check Add/Remove Programs for Winamp version 5.33.Affected if Winamp version 5.33 is installed
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Locate libsndfile.dllSearch for libsndfile.dll in the Winamp installation folder (typically C:\Program Files\Winamp\ or C:\Program Files (x86)\Winamp\) and check its file properties.Affected if libsndfile.dll exists in the Winamp directory and matches the vulnerable version
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Check libsndfile.dll versionRight-click libsndfile.dll, select Properties, and examine the File Version field. Compare this version against known patched versions of libsndfile.dll.Affected if libsndfile.dll version is unpatched and known to be vulnerable to crafted MAT file parsing
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Verify .MAT file associationCheck if .MAT files are associated with or can be opened by Winamp. Right-click a .MAT file, select Open With, or check Winamp's file type associations in preferences.Affected if Winamp is configured to open .MAT audio files, enabling the vulnerable code path
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Inspect running processesUse Task Manager or process enumeration tools to verify if winamp.exe is running and has loaded libsndfile.dll.Affected if Winamp is actively running with the vulnerable library loaded in memory
Your environment is affected if Winamp 5.33 is installed and uses a vulnerable version of libsndfile.dll to process .MAT files.
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.
dbcve · scopedUpdate libsndfile.dll to a patched version and identify all applications using the vulnerable library version; avoid opening untrusted .MAT files until remediated.
Winamp 5.8 (latest stable release) or the most recent version available from nullsoft.com
- 1. Close Winamp if currently running
- 2. Download the latest version of Winamp from the official website (nullsoft.com) or a trusted mirror
- 3. Run the installer and follow the prompts to upgrade
- 4. After installation, verify the version by opening Winamp and checking Help > About Winamp
- 5. Ensure LIBSNDFILE.DLL is updated to a version that addresses the memory corruption vulnerability
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,448.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2007-1921 — 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-2007-1921 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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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