FKIE_CVE-2021-23991

Vulnerability from fkie_nvd - Published: 2021-06-24 14:15 - Updated: 2024-11-21 05:52
Severity ?
6.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Summary
If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.
References
security@mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1673240Exploit, Issue Tracking, Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2021-13/Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.mozilla.org/show_bug.cgi?id=1673240Exploit, Issue Tracking, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2021-13/Release Notes, Vendor Advisory
Impacted products
Vendor Product Version
mozilla thunderbird *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "717003F7-C1B4-4A52-A10F-13DB37ED1FCE",
              "versionEndExcluding": "78.9.1",
              "vulnerable": true
            }
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "If a Thunderbird user has previously imported Alice\u0027s OpenPGP key, and Alice has extended the validity period of her key, but Alice\u0027s updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice\u0027s key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird \u003c 78.9.1."
    },
    {
      "lang": "es",
      "value": "Si un usuario de Thunderbird ha importado previamente la clave OpenPGP de Alice, y Alice ha ampliado el periodo de validez de su clave, pero la clave actualizada de Alice a\u00fan no ha sido importada, un atacante puede enviar un correo electr\u00f3nico conteniendo una versi\u00f3n dise\u00f1ada de la clave de Alice con una subclave no v\u00e1lida, Thunderbird podr\u00eda posteriormente intentar usar la subclave no v\u00e1lida, y producir\u00e1 un fallo al enviar el correo electr\u00f3nico cifrado a Alice. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 78.9.1"
    }
  ],
  "id": "CVE-2021-23991",
  "lastModified": "2024-11-21T05:52:09.950",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "HIGH",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:N",
          "version": "2.0"
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        "exploitabilityScore": 4.9,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
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        "type": "Primary",
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    "cvssMetricV31": [
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          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
          "version": "3.1"
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        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2021-06-24T14:15:09.197",
  "references": [
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      "source": "security@mozilla.org",
      "tags": [
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1673240"
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      "tags": [
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      "url": "https://www.mozilla.org/security/advisories/mfsa2021-13/"
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  "sourceIdentifier": "security@mozilla.org",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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