CVE-2025-40918

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.

References

Affected packages

Git / github.com/perl-authen-sasl/perl-authen-sasl

Affected ranges

Type

GIT

Repo

https://github.com/perl-authen-sasl/perl-authen-sasl

Events

Introduced

34dd9210ae68ef745168fdcbe0b590cb6a3fb8b1

Last affected

e456840b47c3b9ec8527c28eb954c2e548f27708

Database specific

{
    "versions": [
        {
            "introduced": "2.04"
        },
        {
            "last_affected": "2.1800"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40918.json"