CVE-2024-58040
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 · uneditedCrypt::RandomEncryption for Perl version 0.01 uses insecure rand() function during encryption.
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 · moderate confidenceThe Crypt::RandomEncryption Perl module version 0.01 uses the insecure rand() function for generating random numbers during encryption operations. Since rand() is a predictable PRNG not designed for cryptography, attackers could potentially predict or recover encryption keys and decrypt sensitive data.
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= \CVSS 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
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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 if Crypt::RandomEncryption module is installedRun 'perl -MCrypt::RandomEncryption -e 'print "installed\n"'' or check via 'cpan -l | grep RandomEncryption'Affected if The module is installed and being used in your environment
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Determine installed version of Crypt::RandomEncryptionRun 'perl -MCrypt::RandomEncryption -e 'print $Crypt::RandomEncryption::VERSION'' or check the module file directlyAffected if Version 0.01 is installed (the only affected version)
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Inspect module source for rand() usageLocate the module file via 'perldoc -l Crypt::RandomEncryption' then search for 'rand' in the source code with 'grep rand /path/to/RandomEncryption.pm'Affected if The module source code contains calls to rand() function
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Check if your code invokes Crypt::RandomEncryption encryption functionsSearch your Perl codebase for 'use Crypt::RandomEncryption' or 'Crypt::RandomEncryption->new' patternsAffected if Your code calls the module's encryption methods, triggering the vulnerable rand() calls
You are affected if Crypt::RandomEncryption version 0.01 is installed and your code uses the module's encryption functions, which internally rely on the predictable rand() for key generation.
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 dataReplace all instances of rand() with a cryptographically secure random number generator such as Bytes::Random::Secure, Math::Random::Secure, or Perl's built-in Bytes::Random::XS, and verify the encryption output is unpredictable.
- Consultation2.0 h
- Implementation4.0 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-2024-58040 — 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-2024-58040 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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