CVE-2024-58040
📋 TL;DR
CVE-2024-58040 is a critical vulnerability in Crypt::RandomEncryption for Perl version 0.01 that uses the insecure rand() function for cryptographic operations. This allows attackers to predict or manipulate encryption outputs, potentially decrypting sensitive data or bypassing security controls. Any Perl application using this specific module version is affected.
💻 Affected Systems
- Crypt::RandomEncryption for Perl
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of encrypted data, allowing attackers to decrypt sensitive information, forge encrypted messages, or bypass authentication mechanisms that rely on this encryption.
Likely Case
Partial decryption of encrypted data, enabling attackers to extract sensitive information or manipulate encrypted communications in predictable ways.
If Mitigated
Limited impact if encryption is used for non-critical data or with additional security layers, though the fundamental cryptographic weakness remains.
🎯 Exploit Status
Exploitation requires understanding of the specific encryption implementation but doesn't require authentication if the vulnerable module is exposed through an application interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://security.metacpan.org/docs/guides/random-data-for-security.html
Restart Required: Yes
Instructions:
1. Remove Crypt::RandomEncryption version 0.01 from your Perl environment. 2. Replace with a secure cryptographic module like Crypt::CBC with Crypt::Random::Secure. 3. Restart any applications using the module. 4. Re-encrypt any data previously encrypted with the vulnerable module.
🔧 Temporary Workarounds
Replace with secure random source
allModify the module source to use Crypt::Random::Secure instead of rand()
perl -pi -e 's/\brand\b/Crypt::Random::Secure::irand/g' /path/to/RandomEncryption.pm
Disable module usage
allTemporarily disable or block usage of the vulnerable module
mv /path/to/Crypt/RandomEncryption.pm /path/to/Crypt/RandomEncryption.pm.disabled
🧯 If You Can't Patch
- Isolate systems using the vulnerable module from untrusted networks
- Implement additional encryption layer using a secure cryptographic library
🔍 How to Verify
Check if Vulnerable:
Check if Crypt::RandomEncryption version 0.01 is installed: perl -MCrypt::RandomEncryption -e 'print $Crypt::RandomEncryption::VERSION'Check Version:
perl -MCrypt::RandomEncryption -e 'print $Crypt::RandomEncryption::VERSION'Verify Fix Applied:
Verify the module is removed or replaced: perl -e 'use Crypt::RandomEncryption; print "VULNERABLE" if $Crypt::RandomEncryption::VERSION eq "0.01"'📡 Detection & Monitoring
Log Indicators:
- Failed decryption attempts with predictable patterns
- Unusual encryption/decryption timing patterns
Network Indicators:
- Repeated encrypted payloads with minor variations
- Predictable encryption outputs
SIEM Query:
source="application.log" AND "Crypt::RandomEncryption" AND version="0.01"