CVE Alert: CVE-2025-40918
Vulnerability Summary: CVE-2025-40918
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.
Affected Endpoints:
No affected endpoints listed.
Published Date:
7/16/2025, 2:15:25 PM
⚠️ CVSS Score:
Exploit Status:
Not ExploitedReferences:
- https://datatracker.ietf.org/doc/html/rfc2831
- https://github.com/gbarr/perl-authen-sasl/pull/22
- https://metacpan.org/dist/Authen-SASL/source/lib/Authen/SASL/Perl/DIGEST_MD5.pm#L263
- https://security.metacpan.org/patches/A/Authen-SASL/2.1800/CVE-2025-40918-r1.patch
Recommended Action:
No proposed action available. Please refer to vendor documentation for updates.
A considerable amount of time and effort goes into maintaining this website, creating backend automation and creating new features and content for you to make actionable intelligence decisions. Everyone that supports the site helps enable new functionality.
If you like the site, please support us on “Patreon” or “Buy Me A Coffee” using the buttons below
To keep up to date follow us on the below channels.
