Vulnerability-Lookup

OPENSUSE-SU-2026:20480-1

Vulnerability from csaf_opensuse - Published: 2026-04-09 10:58 - Updated: 2026-09-17 17:29

Summary

Security update for perl-Authen-SASL

Severity

Moderate

Notes

Title of the patch: Security update for perl-Authen-SASL

Description of the patch: This update for perl-Authen-SASL fixes the following issues: Changes in perl-Authen-SASL: - CVE-2025-40918: use Crypt:URandom for generating nonces (bsc#1246623)

Patchnames: openSUSE-Leap-16.0-495

CVE-2025-40918

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

Recommended 5 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:perl-Authen-SASL-0:2.170.0-160000.3.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:perl-Crypt-URandom-0:0.550.0-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:perl-Crypt-URandom-0:0.550.0-160000.1.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:perl-Crypt-URandom-0:0.550.0-160000.1.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:perl-Crypt-URandom-0:0.550.0-160000.1.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

7 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1246623	self
https://www.suse.com/security/cve/CVE-2025-40918/	self
https://www.suse.com/security/cve/CVE-2025-40918	external
https://bugzilla.suse.com/1246623	external
https://bugzilla.suse.com/1279806	external

JSON

To clipboard

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          "text": "Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely.\n\nThe 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.\n\nAccording 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\n depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy.",
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}

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

Vulnerability from cvelistv5 – Published: 2025-07-16 14:00 – Updated: 2025-11-04 21:10

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 redhat root

References

6 references

URL	Tags
https://metacpan.org/release/EHUELS/Authen-SASL-2…
https://metacpan.org/dist/Authen-SASL/source/lib/…
https://datatracker.ietf.org/doc/html/rfc2831
https://security.metacpan.org/patches/A/Authen-SA…	patch
https://github.com/gbarr/perl-authen-sasl/pull/22	issue-tracking
http://www.openwall.com/lists/oss-security/2025/07/16/5

Impacted products

1 product

Vendor	Product	Version
EHUELS	Authen::SASL::Perl::DIGEST_MD5	Affected: 2.04 , ≤ 2.1800 (custom)

Show details on NVD website

JSON

To clipboard

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              "attackVector": "NETWORK",
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        "title": "CISA ADP Vulnrichment"
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      "providerMetadata": {
        "dateUpdated": "2025-08-07T09:08:47.396Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/EHUELS/Authen-SASL-2.1900/changes"
        },
        {
          "url": "https://metacpan.org/dist/Authen-SASL/source/lib/Authen/SASL/Perl/DIGEST_MD5.pm#L263"
        },
        {
          "url": "https://datatracker.ietf.org/doc/html/rfc2831"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://security.metacpan.org/patches/A/Authen-SASL/2.1800/CVE-2025-40918-r1.patch"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/gbarr/perl-authen-sasl/pull/22"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eUsers should upgrade to version 2.1900 or later.\u003c/div\u003e"
            }
          ],
          "value": "Users should upgrade to version 2.1900 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2025-40918",
    "datePublished": "2025-07-16T14:00:12.777Z",
    "dateReserved": "2025-04-16T09:05:34.361Z",
    "dateUpdated": "2025-11-04T21:10:18.064Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

OPENSUSE-SU-2026:20480-1

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

Tags

Sightings

Nomenclature

Related by attack behaviour