Vulnerability-Lookup

SUSE-SU-2026:4280-1

Vulnerability from csaf_suse - Published: 2026-09-22 08:32 - Updated: 2026-09-23 08:31

Summary

Security update for perl-Authen-SASL

Severity

Important

Notes

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

Description of the patch: This update for perl-Authen-SASL fixes the following issue: - CVE-2026-86219: replayed authentication responses accepted due to unverified nonce in `server_step` (bsc#1279806).

Patchnames: SUSE-2026-4280,SUSE-SLE-SERVER-12-SP5-LTSS-2026-4280,SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-4280

CVE-2026-86219

7.4 (High)


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

Affected products

Recommended 5 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise High Performance Computing 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5-LTSS:perl-Authen-SASL-0:2.16-5.6.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch	—	Vendor Fix

Threats

Impact important

References

8 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://www.suse.com/support/update/announcement/…	self
https://bugzilla.suse.com/1279806	self
https://www.suse.com/security/cve/CVE-2026-86219/	self
https://www.suse.com/security/cve/CVE-2026-86219	external
https://bugzilla.suse.com/1279806	external

JSON

To clipboard

{
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      "text": "important"
    },
    "category": "csaf_security_advisory",
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        "title": "Description of the patch"
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        },
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      },
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        },
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        "relates_to_product_reference": "SUSE Linux Enterprise High Performance Computing 12 SP5"
      },
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        "full_product_name": {
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        },
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        "relates_to_product_reference": "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5"
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-86219",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-86219"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified nonce in server_step.\n\nserver_start generates a fresh nonce and sends it in the challenge, and nothing later compares that value against the nonce the client returns. server_step derives the expected digest from the client\u0027s own parameters, so a response verifies whenever its digest matches the nonce it carries. The count table it also checks is keyed on the client-supplied nonce and starts empty in each new server object, so a captured first response, carrying `nc=00000001`, passes that too. RFC 2831 defines the nonce in the response as the value the server sent in the preceding challenge.\n\nAn attacker who observes one successful `qop=auth` exchange can replay the captured response against a later session for the same service, host, realm and user, and authenticate as that user without knowing the password.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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        ]
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          "url": "https://www.suse.com/security/cve/CVE-2026-86219"
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          "category": "external",
          "summary": "SUSE Bug 1279806 for CVE-2026-86219",
          "url": "https://bugzilla.suse.com/1279806"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise High Performance Computing 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch",
            "SUSE Linux Enterprise Server 12 SP5-LTSS:perl-Authen-SASL-0:2.16-5.6.1.noarch",
            "SUSE Linux Enterprise Server 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch",
            "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise High Performance Computing 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch",
            "SUSE Linux Enterprise Server 12 SP5-LTSS:perl-Authen-SASL-0:2.16-5.6.1.noarch",
            "SUSE Linux Enterprise Server 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch",
            "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch",
            "SUSE Linux Enterprise Server for SAP Applications 12 SP5:perl-Authen-SASL-0:2.16-5.6.1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-09-22T08:32:16Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-86219"
    }
  ]
}

CVE-2026-86219 (GCVE-0-2026-86219)

Vulnerability from cvelistv5 – Published: 2026-09-06 17:46 – Updated: 2026-09-08 18:54

Title

Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified nonce in server_step

Summary

Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified nonce in server_step. server_start generates a fresh nonce and sends it in the challenge, and nothing later compares that value against the nonce the client returns. server_step derives the expected digest from the client's own parameters, so a response verifies whenever its digest matches the nonce it carries. The count table it also checks is keyed on the client-supplied nonce and starts empty in each new server object, so a captured first response, carrying `nc=00000001`, passes that too. RFC 2831 defines the nonce in the response as the value the server sent in the preceding challenge. An attacker who observes one successful `qop=auth` exchange can replay the captured response against a later session for the same service, host, realm and user, and authenticate as that user without knowing the password.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 18:54 UTC

CWE

CWE-294 - Authentication Bypass by Capture-replay

Assigner

CPANSec CNA under the redhat root

CNA scorecard C 61/100 over 364 records in the last 180 days details

References

6 references

URL	Tags
https://metacpan.org/release/EHUELS/Authen-SASL-2…
https://metacpan.org/release/EHUELS/Authen-SASL-2…
https://datatracker.ietf.org/doc/html/rfc2831#sec…
https://github.com/perl-authen-sasl/perl-authen-s…	patch
https://metacpan.org/release/EHUELS/Authen-SASL-2…	release-notes
https://www.cve.org/CVERecord?id=CVE-2025-40918	related

Impacted products

1 product

Vendor	Product	Version
		Affected: 0 , < 2.2100 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-86219",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T18:54:38.530817Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-08T18:54:55.841Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "Authen::SASL::Perl::DIGEST_MD5"
          ],
          "packageName": "Authen-SASL",
          "packageURL": "pkg:cpan/Authen-SASL",
          "programFiles": [
            "lib/Authen/SASL/Perl/DIGEST_MD5.pm"
          ],
          "programRoutines": [
            {
              "name": "Authen::SASL::Perl::DIGEST_MD5::server_step"
            },
            {
              "name": "Authen::SASL::Perl::DIGEST_MD5::server_start"
            }
          ],
          "repo": "https://github.com/perl-authen-sasl/perl-authen-sasl",
          "versions": [
            {
              "lessThan": "2.2100",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified nonce in server_step.\n\nserver_start generates a fresh nonce and sends it in the challenge, and nothing later compares that value against the nonce the client returns. server_step derives the expected digest from the client\u0027s own parameters, so a response verifies whenever its digest matches the nonce it carries. The count table it also checks is keyed on the client-supplied nonce and starts empty in each new server object, so a captured first response, carrying `nc=00000001`, passes that too. RFC 2831 defines the nonce in the response as the value the server sent in the preceding challenge.\n\nAn attacker who observes one successful `qop=auth` exchange can replay the captured response against a later session for the same service, host, realm and user, and authenticate as that user without knowing the password."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-115",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-115 Authentication Bypass"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-294",
              "description": "CWE-294 Authentication Bypass by Capture-replay",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-06T17:46:30.340Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/EHUELS/Authen-SASL-2.2000/source/lib/Authen/SASL/Perl/DIGEST_MD5.pm#L203-222"
        },
        {
          "url": "https://metacpan.org/release/EHUELS/Authen-SASL-2.2000/source/lib/Authen/SASL/Perl/DIGEST_MD5.pm#L410-414"
        },
        {
          "url": "https://datatracker.ietf.org/doc/html/rfc2831#section-2.1.2"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/perl-authen-sasl/perl-authen-sasl/commit/94337367030612842924f697cead29964a96448d.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/EHUELS/Authen-SASL-2.2100/changes"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-40918"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Authen-SASL 2.2100 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Authen::SASL::Perl::DIGEST_MD5 versions before 2.2100 for Perl accept replayed authentication responses via unverified nonce in server_step",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-86219",
    "datePublished": "2026-09-06T17:46:30.340Z",
    "dateReserved": "2026-09-06T00:13:35.358Z",
    "dateUpdated": "2026-09-08T18:54:55.841Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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Publication & reservation Sightings KEV catalogs Other timestamps

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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.

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