Vulnerability-Lookup

FKIE_CVE-2021-28374

Vulnerability from fkie_nvd - Published: 2021-03-15 05:15 - Updated: 2026-06-17 03:46

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library creates a /run/courier/authdaemon directory with weak permissions, allowing an attacker to read user information. This may include a cleartext password in some configurations. In general, it includes the user's existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash).

References

URL	Tags
cve@mitre.org	https://bugs.debian.org/984810	Mailing List, Vendor Advisory
cve@mitre.org	https://lists.debian.org/debian-lts-announce/2021/04/msg00011.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugs.debian.org/984810	Mailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2021/04/msg00011.html	Mailing List, Third Party Advisory

Impacted products

	Vendor	Product	Version
	debian	courier-authlib	*
	debian	debian_linux	9.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:debian:courier-authlib:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F9841CEE-3EF1-46EF-AB0D-0574062A7FC3",
              "versionEndExcluding": "0.71.1-2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library creates a /run/courier/authdaemon directory with weak permissions, allowing an attacker to read user information. This may include a cleartext password in some configurations. In general, it includes the user\u0027s existence, uid and gids, home and/or Maildir directory, quota, and some type of password information (such as a hash)."
    },
    {
      "lang": "es",
      "value": "El paquete Debian courier-authlib versiones anteriores a 0.71.1-2 para Courier Authentication Library, crea un directorio /run/courier/authdaemon con permisos d\u00e9biles, permitiendo a un atacante leer la informaci\u00f3n del usuario.\u0026#xa0;Esto puede incluir una contrase\u00f1a de texto sin cifrar en algunas configuraciones.\u0026#xa0;En general, incluye la existencia del usuario, uid y gids, directorio de inicio y/o Maildir, cuota y alg\u00fan tipo de informaci\u00f3n de contrase\u00f1a (como un hash)"
    }
  ],
  "id": "CVE-2021-28374",
  "lastModified": "2026-06-17T03:46:17.893",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-03-15T05:15:12.467",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://bugs.debian.org/984810"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/04/msg00011.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://bugs.debian.org/984810"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/04/msg00011.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-28374 (GCVE-0-2021-28374)

Vulnerability from cvelistv5 – Published: 2021-03-15 04:51 – Updated: 2024-08-03 21:40

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://bugs.debian.org/984810	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T21:40:14.154Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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              "x_transferred"
            ],
            "url": "https://bugs.debian.org/984810"
          },
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            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/04/msg00011.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
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          "vendor": "n/a",
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      ],
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        }
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      "problemTypes": [
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      "providerMetadata": {
        "dateUpdated": "2021-04-14T09:06:18.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
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          "url": "https://bugs.debian.org/984810"
        },
        {
          "name": "[debian-lts-announce] 20210414 [SECURITY] [DLA 2625-1] courier-authlib security update",
          "tags": [
            "mailing-list",
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          ],
          "url": "https://lists.debian.org/debian-lts-announce/2021/04/msg00011.html"
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      ],
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          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-28374",
          "STATE": "PUBLIC"
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        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
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                      }
                    }
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                "vendor_name": "n/a"
              }
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          }
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    "datePublished": "2021-03-15T04:51:56.000Z",
    "dateReserved": "2021-03-15T00:00:00.000Z",
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}

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.