Vulnerability-Lookup

ubuntu-cve-2026-9641

Vulnerability from osv_ubuntu

Published

2026-06-12 16:16

Modified

2026-06-17 04:26

Summary

Details

Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations. The default algorithm is HMAC-SHA1, which should only be used for legacy systems. These versions default to using 1000 iterations. Depending on the chosen algorithm, 220,000 to 1,400,000 iterations should be used.

Severity

5.3 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-9641	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-9641	REPORT
	https://lists.security.metacpan.org/cve-announce/…	REPORT
	https://cheatsheetseries.owasp.org/cheatsheets/Pa…	REPORT
	https://metacpan.org/release/ARODLAND/Crypt-PBKDF…	REPORT
	http://www.openwall.com/lists/oss-security/2026/06/12/5	REPORT
	http://www.openwall.com/lists/oss-security/2026/06/13/1	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-pbkdf2-perl",
            "binary_version": "0.160410-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libcrypt-pbkdf2-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-pbkdf2-perl@0.160410-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.150900-1",
        "0.160410-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-pbkdf2-perl",
            "binary_version": "0.161520-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libcrypt-pbkdf2-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-pbkdf2-perl@0.161520-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.161520-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-pbkdf2-perl",
            "binary_version": "0.161520-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libcrypt-pbkdf2-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-pbkdf2-perl@0.161520-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.161520-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-pbkdf2-perl",
            "binary_version": "0.161520-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libcrypt-pbkdf2-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-pbkdf2-perl@0.161520-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.161520-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-pbkdf2-perl",
            "binary_version": "0.161520-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libcrypt-pbkdf2-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-pbkdf2-perl@0.161520-2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.161520-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-pbkdf2-perl",
            "binary_version": "0.161520-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libcrypt-pbkdf2-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-pbkdf2-perl@0.161520-2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.161520-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcrypt-pbkdf2-perl",
            "binary_version": "0.161520-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libcrypt-pbkdf2-perl",
        "purl": "pkg:deb/ubuntu/libcrypt-pbkdf2-perl@0.161520-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.161520-2"
      ]
    }
  ],
  "aliases": [],
  "details": "Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations. The default algorithm is HMAC-SHA1, which should only be used for legacy systems. These versions default to using 1000 iterations. Depending on the chosen algorithm, 220,000 to 1,400,000 iterations should be used.",
  "id": "UBUNTU-CVE-2026-9641",
  "modified": "2026-06-17T04:26:58Z",
  "published": "2026-06-12T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-9641"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-9641"
    },
    {
      "type": "REPORT",
      "url": "https://lists.security.metacpan.org/cve-announce/msg/40933040/"
    },
    {
      "type": "REPORT",
      "url": "https://cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html#pbkdf2"
    },
    {
      "type": "REPORT",
      "url": "https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/12/5"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/13/1"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-9641"
  ]
}

CVE-2026-9641 (GCVE-0-2026-9641)

Vulnerability from cvelistv5 – Published: 2026-06-12 14:57 – Updated: 2026-06-14 14:46

Title

Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations

Summary

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-12 17:46 UTC

CWE

CWE-916 - Use of Password Hash With Insufficient Computational Effort

Assigner

CPANSec redhat root

References

7 references

URL	Tags
https://cheatsheetseries.owasp.org/cheatsheets/Pa…	technical-description
https://metacpan.org/release/ARODLAND/Crypt-PBKDF…	release-notes
http://www.openwall.com/lists/oss-security/2026/06/12/5
http://www.openwall.com/lists/oss-security/2026/06/13/1
http://www.openwall.com/lists/oss-security/2026/06/14/1
http://www.openwall.com/lists/oss-security/2026/06/14/2
http://www.openwall.com/lists/oss-security/2026/06/14/3

Impacted products

1 product

Vendor	Product	Version
ARODLAND	Crypt::PBKDF2	Affected: 0 , < 0.261630 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-9641",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-12T17:46:14.634769Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-12T17:46:30.101Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-06-14T14:46:24.576Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/12/5"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/13/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/14/1"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/14/2"
          },
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/14/3"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Crypt-PBKDF2",
          "product": "Crypt::PBKDF2",
          "repo": "https://github.com/arodland/Crypt-PBKDF2",
          "vendor": "ARODLAND",
          "versions": [
            {
              "lessThan": "0.261630",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations.\n\nThe default algorithm is HMAC-SHA1, which should only be used for legacy systems.\n\nThese versions default to using 1000 iterations.\n\nDepending on the chosen algorithm, 220,000 to 1,400,000 iterations should be used."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-916",
              "description": "CWE-916 Use of Password Hash With Insufficient Computational Effort",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-12T14:57:30.534Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html#pbkdf2"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to version 0.261630 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations",
      "workarounds": [
        {
          "lang": "en",
          "value": "Change the default algorithm to something stronger, such as \"HMACSHA2\", and the output_len accordingly (32 for SHA256).\n\nThe number of iterations should also be increased (600,000 for SHA256, for example)."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-9641",
    "datePublished": "2026-06-12T14:57:30.534Z",
    "dateReserved": "2026-05-26T18:44:37.132Z",
    "dateUpdated": "2026-06-14T14:46:24.576Z",
    "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.