CVE-2024-14031
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 · uneditedSereal::Encoder versions from 4.000 through 4.009_002 for Perl embeds a vulnerable version of the Zstandard library. Sereal::Encoder embeds a version of the Zstandard (zstd) library that is vulnerable to CVE-2019-11922. This is a race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.
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 confidenceSereal::Encoder for Perl versions 4.000 through 4.009_002 embeds a vulnerable version of the Zstandard (zstd) library affected by CVE-2019-11922. This is a race condition in one-pass compression functions that allows an attacker to write bytes out of bounds when an output buffer smaller than the recommended size is used, potentially leading to memory corruption or denial of service.
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>= 4.000, < 4.010CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/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 installed Sereal::Encoder versionRun 'perl -MSereal::Encoder -e "print Sereal::Encoder::VERSION"' or check via cpan/cpanm listingAffected if Version is 4.000 through 4.009 (inclusive)
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Verify Perl module installationConfirm Sereal::Encoder is installed: 'perl -MSereal::Encoder -e 1' returns without errorAffected if Module exists but version is in the vulnerable range
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Confirm embedded zstd presenceInspect Sereal::Encoder installation directory for bundled zstd library files (typically in lib/ or along with Encoder.pm)Affected if Embedded zstd library exists within Sereal::Encoder bundle
If Sereal::Encoder version is 4.000 through 4.009 and uses the bundled zstd library for compression, the environment is affected by CVE-2024-14031.
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 · scoped4.010
Upgrade Sereal::Encoder to version 4.010 or later which embeds Zstandard >= 1.3.8, or ensure proper buffer sizing when using one-pass compression functions if upgrade is not feasible.
Sereal::Encoder >= 4.010
- Upgrade Sereal::Encoder to version 4.010 or later using your Perl package manager (e.g., cpanm Sereal::Encoder or cpan Sereal::Encoder)
- Verify the installed version by running 'perl -MSereal::Encoder -e 'print $Sereal::Encoder::VERSION'
- Restart any services or processes that use Sereal::Encoder to ensure the new version is loaded
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation2.0 h
- Testing3.0 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 $2,832.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-14031 — 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-2024-14031 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
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