Vulnerability DatabaseCVE-2025-2814
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CVE-2025-2814
April 12, 2025
Crypt::CBC versions between 1.21 and 3.05 for Perl may use the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions. This issue affects operating systems where "/dev/urandom'" is unavailable.  In that case, Crypt::CBC will fallback to use the insecure rand() function.
Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (4)
https://security.metacpan.org/docs/guides/random-data-for-security.html
https://perldoc.perl.org/functions/rand
https://github.com/lstein/Lib-Crypt-CBC/commit/37111f7cd894bcec46156ba7f40a49c126ebf535.patch
https://metacpan.org/dist/Crypt-CBC/source/lib/Crypt/CBC.pm#L777
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CVSS v4
Base Score:
5.1
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
CWE-338
Generation of Predictable IV with CBC Mode
CWE-329
Insufficient Entropy
CWE-331
EPSS
Base Score:
0.12