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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-40919 Detail

Description

Authen::DigestMD5 versions 0.01 through 0.02 for Perl generate the cnonce insecurely. The cnonce (client nonce) is generated from an MD5 hash of the PID, the epoch time and the built-in rand function. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. According to RFC 2831, "The cnonce-value is an opaque quoted string value provided by the client and used by both client and server to avoid chosen plaintext attacks, and to provide mutual authentication. The security of the implementation depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy."


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://datatracker.ietf.org/doc/html/rfc2831 CPANSec
https://metacpan.org/release/SALVA/Authen-DigestMD5-0.01/source/DigestMD5.pm#L126 CPANSec

Weakness Enumeration

CWE-ID CWE Name Source
CWE-340 Generation of Predictable Numbers or Identifiers CPANSec  
CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) CPANSec  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-40919
NVD Published Date:
07/16/2025
NVD Last Modified:
07/16/2025
Source:
CPANSec