CVE-2025-40918 (GCVE-0-2025-40918)
Vulnerability from cvelistv5 – Published: 2025-07-16 14:00 – Updated: 2025-11-04 21:10
VLAI
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-16 20:48 UTC
CWE
Assigner
CPANSec
CNA
References
6 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| EHUELS | Authen::SASL::Perl::DIGEST_MD5 |
Affected:
2.04 , ≤ 2.1800
(custom)
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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