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Vulnerabilities

Security incident · CVE-2025-40918

Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely.

Published Jul 16, 2025 · catalog updated Nov 4, 2025 · EHUELS Authen::SASL::Perl::DIGEST_MD5

Check this week

CVE-2025-40918 is not in CISA KEV. FIRST estimates a 45.00% chance of exploitation in the next 30 days. Check whether you run EHUELS Authen::SASL::Perl::DIGEST_MD5.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
45.00%
Remediation
Advisory link
Affected products
vendor EHUELS Authen::SASL::Perl::DIGEST_MD5 2.04 ≤2.1800

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor EHUELS Authen::SASL::Perl::DIGEST_MD5 2.04 ≤2.18002.04 ≤2.1800

How to fix CVE-2025-40918

  • Recommended remediation

    A patch or advisory reference is linked. Open the original publisher for availability by product version.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-40918 is not in CISA KEV. FIRST estimates a 45.00% chance of exploitation in the next 30 days. Check whether you run EHUELS Authen::SASL::Perl::DIGEST_MD5.

Which versions are affected?

Compare what you have installed with EHUELS Authen::SASL::Perl::DIGEST_MD5 2.04 ≤2.1800 2.04 ≤2.1800. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 45.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 16, 2025 · EUVD

    Detected

    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 cryptogra

  2. Nov 4, 2025 · EUVD

    Updated

    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 cryptogra

Sources

  • EUVDVulnerability recordEUVD-2025-21696

    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 ti

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 4, 2025. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.