gsd-2021-23991
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
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.
Aliases
Aliases
CVE-2021-23991


To clipboard 

{
   GSD: {
      alias: "CVE-2021-23991",
      description: "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.",
      id: "GSD-2021-23991",
      references: [
         "https://www.suse.com/security/cve/CVE-2021-23991.html",
         "https://www.debian.org/security/2021/dsa-4897",
         "https://access.redhat.com/errata/RHSA-2021:1201",
         "https://access.redhat.com/errata/RHSA-2021:1193",
         "https://access.redhat.com/errata/RHSA-2021:1192",
         "https://access.redhat.com/errata/RHSA-2021:1190",
         "https://ubuntu.com/security/CVE-2021-23991",
         "https://advisories.mageia.org/CVE-2021-23991.html",
         "https://security.archlinux.org/CVE-2021-23991",
         "https://linux.oracle.com/cve/CVE-2021-23991.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2021-23991",
         ],
         details: "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.",
         id: "GSD-2021-23991",
         modified: "2023-12-13T01:23:29.659104Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "security@mozilla.org",
            ID: "CVE-2021-23991",
            STATE: "PUBLIC",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "Thunderbird",
                              version: {
                                 version_data: [
                                    {
                                       version_affected: "<",
                                       version_value: "78.9.1",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "Mozilla",
                  },
               ],
            },
         },
         data_format: "MITRE",
         data_type: "CVE",
         data_version: "4.0",
         description: {
            description_data: [
               {
                  lang: "eng",
                  value: "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.",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://www.mozilla.org/security/advisories/mfsa2021-13/",
                  refsource: "MISC",
                  url: "https://www.mozilla.org/security/advisories/mfsa2021-13/",
               },
               {
                  name: "https://bugzilla.mozilla.org/show_bug.cgi?id=1673240",
                  refsource: "MISC",
                  url: "https://bugzilla.mozilla.org/show_bug.cgi?id=1673240",
               },
            ],
         },
      },
      "mozilla.org": {
         CVE_data_meta: {
            ASSIGNER: "security@mozilla.org",
            ID: "CVE-2021-23991",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "Thunderbird",
                              version: {
                                 version_data: [
                                    {
                                       version_affected: "<",
                                       version_value: "78.9.1",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "Mozilla",
                  },
               ],
            },
         },
         data_format: "MITRE",
         data_type: "CVE",
         data_version: "4.0",
         description: {
            description_data: [
               {
                  lang: "eng",
                  value: "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.",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  url: "https://www.mozilla.org/security/advisories/mfsa2021-13/",
               },
               {
                  url: "https://bugzilla.mozilla.org/show_bug.cgi?id=1673240",
               },
            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "78.9.1",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "security@mozilla.org",
               ID: "CVE-2021-23991",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     value: "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.",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "NVD-CWE-Other",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://www.mozilla.org/security/advisories/mfsa2021-13/",
                     refsource: "MISC",
                     tags: [
                        "Release Notes",
                        "Vendor Advisory",
                     ],
                     url: "https://www.mozilla.org/security/advisories/mfsa2021-13/",
                  },
                  {
                     name: "https://bugzilla.mozilla.org/show_bug.cgi?id=1673240",
                     refsource: "MISC",
                     tags: [
                        "Exploit",
                        "Issue Tracking",
                        "Vendor Advisory",
                     ],
                     url: "https://bugzilla.mozilla.org/show_bug.cgi?id=1673240",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "HIGH",
                  accessVector: "NETWORK",
                  authentication: "NONE",
                  availabilityImpact: "NONE",
                  baseScore: 4,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "PARTIAL",
                  vectorString: "AV:N/AC:H/Au:N/C:P/I:P/A:N",
                  version: "2.0",
               },
               exploitabilityScore: 4.9,
               impactScore: 4.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "MEDIUM",
               userInteractionRequired: true,
            },
            baseMetricV3: {
               cvssV3: {
                  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",
               },
               exploitabilityScore: 1.6,
               impactScore: 5.2,
            },
         },
         lastModifiedDate: "2021-07-08T15:50Z",
         publishedDate: "2021-06-24T14:15Z",
      },
   },
}


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