Vulnerability-Lookup

FKIE_CVE-2021-26911

Vulnerability from fkie_nvd - Published: 2021-02-17 21:15 - Updated: 2026-06-17 03:43

Severity

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

Summary

core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.

References

URL	Tags
cve@mitre.org	http://www.openwall.com/lists/oss-security/2021/02/17/3	Mailing List, Patch, Third Party Advisory
cve@mitre.org	https://apps.apple.com/us/app/canary-mail/id1236045954	Product, Third Party Advisory
cve@mitre.org	https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/	Exploit, Third Party Advisory
cve@mitre.org	https://census-labs.com/news/category/advisories/	Third Party Advisory
cve@mitre.org	https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018	Patch, Third Party Advisory
cve@mitre.org	https://www.openwall.com/lists/oss-security/2021/02/17/3	Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/02/17/3	Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://apps.apple.com/us/app/canary-mail/id1236045954	Product, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/	Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://census-labs.com/news/category/advisories/	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.openwall.com/lists/oss-security/2021/02/17/3	Mailing List, Patch, Third Party Advisory

Impacted products

Vendor	Product	Version
canarymail	canary_mail	3.20
canarymail	canary_mail	3.21
libmailcore	mailcore2	0.6.4

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:canarymail:canary_mail:3.20:*:*:*:*:iphone_os:*:*",
              "matchCriteriaId": "8A0F96F5-488B-485C-93D9-0DFE7DD732C4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:canarymail:canary_mail:3.21:*:*:*:*:iphone_os:*:*",
              "matchCriteriaId": "A3D232FE-4500-4FD5-B7B0-901134B488E2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:libmailcore:mailcore2:0.6.4:*:*:*:*:*:*:*",
              "matchCriteriaId": "973E27F1-AE98-4C43-BE54-C4A453EEF046",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode."
    },
    {
      "lang": "es",
      "value": "El archivo core/imap/MCIMAPSession.cpp en Canary Mail versiones anteriores a 3.22, tiene una Falta de Comprobaci\u00f3n de Certificado SSL para IMAP en modo STARTTLS"
    }
  ],
  "id": "CVE-2021-26911",
  "lastModified": "2026-06-17T03:43:59.270",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-02-17T21:15:12.900",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2021/02/17/3"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://apps.apple.com/us/app/canary-mail/id1236045954"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://census-labs.com/news/category/advisories/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018"
    },
    {
      "source": "cve@mitre.org",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2021/02/17/3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://apps.apple.com/us/app/canary-mail/id1236045954"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://census-labs.com/news/category/advisories/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
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      "url": "https://www.openwall.com/lists/oss-security/2021/02/17/3"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-26911 (GCVE-0-2021-26911)

Vulnerability from cvelistv5 – Published: 2021-02-17 20:54 – Updated: 2024-08-03 20:33

Summary

core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

6 references

URL	Tags
https://apps.apple.com/us/app/canary-mail/id1236045954	x_refsource_MISC
https://census-labs.com/news/category/advisories/	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/…	x_refsource_MISC
https://census-labs.com/news/2021/02/17/canary-ma…	x_refsource_MISC
https://github.com/canarymail/mailcore2/commit/45…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2021/02/17/3	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

To clipboard

{
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      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:33:41.331Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            ],
            "url": "https://apps.apple.com/us/app/canary-mail/id1236045954"
          },
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            "url": "https://census-labs.com/news/category/advisories/"
          },
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            "url": "https://www.openwall.com/lists/oss-security/2021/02/17/3"
          },
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            ],
            "url": "https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018"
          },
          {
            "name": "[oss-security] 20210217 CVE-2021-26911: Canary Mail with IMAP STARTTLS missing certificate validation",
            "tags": [
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            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/02/17/3"
          }
        ],
        "title": "CVE Program Container"
      }
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    "cna": {
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  "dataVersion": "5.1"
}

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.

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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FKIE_CVE-2021-26911

CVE-2021-26911 (GCVE-0-2021-26911)

Tags

Sightings

Nomenclature

Related by attack behaviour