CVE-2025-40918 (GCVE-0-2025-40918)

Vulnerability from cvelistv5 – Published: 2025-07-16 14:00 – Updated: 2025-11-04 21:10
VLAI
Title
Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely
Summary
Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates 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.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-16 20:48 UTC
CWE
  • CWE-340 - Generation of Predictable Numbers or Identifiers
  • CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 61/100 over 363 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
EHUELS Authen::SASL::Perl::DIGEST_MD5 Affected: 2.04 , ≤ 2.1800 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.